Providers Brian Greenspan, RN to Marsha Greenstein, PH.D.
300 individual NPIs in the federal registry, part 8,283 of 24,427 of the A to Z by surname. Each row is the registry's record: the name and credential, the NPI, the primary specialty, the practice city and the year the NPI was issued. 111 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| Brian Greenspan, RN | 1639022452 | Adult Health Nurse Practitioner | Portland, OR | 2026 |
| Brittany Greenspan, NNP | 1265918015 | Critical Care Neonatal Nurse Practitioner | Gainesville, GA | 2018 |
| Bruce Greenspan, M.D. | 1992805568 | Specialist | Bethlehem, PA | 2006 |
| Bryna Greenspan, PA | 1811966039 | Physician Assistant | North Adams, MA | 2006 |
| Cara Greenspan, RD, LDN | 1710505904 | Obesity and Weight Management Nutrition Registered Dietitian | Philadelphia, PA | 2020 |
| Carol Greenspan, MD | 1134159080 | Anesthesiology Physician | Indianapolis, IN | 2006 |
| Caroline Greenspan, DPT | 1356163596 | Physical Therapist | Denver, CO | 2024 |
| Carolyn Greenspan, LICSW | 1114551652 | Clinical Social Worker | Washington, DC | 2020 |
| Carrie Greenspan, MD | 1396890596 | Obstetrics & Gynecology Physician | Coral Springs, FL | 2007 |
| Carter Greenspan, ATC, LAT | 1356702260 | Athletic Trainer | Orlando, FL | 2016 |
| Chaim Greenspan, RN | 1407285703 | Registered Nurse | Brooklyn, NY | 2013 |
| Chaya Greenspan, MS OTRL | 1609995679 | Pediatric Occupational Therapist | Teaneck, NJ | 2007 |
| Chelsea Greenspan, PA | 1194231449 | Physician Assistant | Charlottesville, VA | 2017 |
| Cole Greenspan | 1982004651 | Student in an Organized Health Care Education/Training Program | Potomac, MD | 2014 |
| Cynthia Greenspan, LCSW | 1225275175 | Clinical Social Worker | Alexandria, VA | 2009 |
| Daniel Greenspan, MD | 1881857332 | Diagnostic Radiology Physician | Newnan, GA | 2008 |
| Danielle Greenspan | 1427424001 | Marriage & Family Therapist | Citrus Heights, CA | 2015 |
| David Greenspan, M.D. | 1306894126 | Geriatric Psychiatry Physician | Philadelphia, PA | 2006 |
| David Greenspan, MD | 1316918865 | Obstetrics & Gynecology Physician | Phoenix, AZ | 2006 |
| David Greenspan, D.C. | 1952335242 | Chiropractor | Asheville, NC | 2006 |
| Deborah Greenspan, DSC | 1841228285 | Oral and Maxillofacial Surgery (Dentist) | San Francisco, CA | 2006 |
| Debra Greenspan, NP | 1225045701 | Adult Health Nurse Practitioner | Nashville, TN | 2006 |
| Diana Greenspan | 1639569544 | Specialist | Islip, NY | 2015 |
| Doug Greenspan, D.C. | 1033295050 | Chiropractor | Ozone Park, NY | 2006 |
| Douglas Greenspan, DDS | 1790797306 | Dentist | Gaithersburg, MD | 2006 |
| Drew Greenspan, BCBA | 1437986734 | Behavior Analyst | Lawrenceville, NJ | 2024 |
| Edward Greenspan | 1417116898 | Optician | Bronx, NY | 2008 |
| Elicia Greenspan, LCSW | 1275876658 | Clinical Social Worker | Indianapolis, IN | 2013 |
| Elisheva Greenspan | 1396414751 | Occupational Therapist | Denver, CO | 2021 |
| Ellen Greenspan, PH.D. | 1124165709 | Psychologist | Merrick, NY | 2007 |
| Elliott Greenspan, D.O. | 1003803966 | Internal Medicine Physician | Bloomfield Hills, MI | 2005 |
| Emily Greenspan, MD | 1659327427 | Dermatology Physician | New Hyde Park, NY | 2006 |
| Eric Greenspan, DDS | 1194946400 | Dentist | Brooklyn, NY | 2007 |
| Eric Greenspan, D.C. | 1295094308 | Chiropractor | Canton, MA | 2012 |
| Erica Greenspan, LICSW, LCSW-C | 1083120455 | Clinical Social Worker | Silver Spring, MD | 2017 |
| Erin Greenspan, ND | 1285108365 | Naturopath | Santa Fe, NM | 2019 |
| Erin Greenspan, M.A., L.A.C. | 1790032811 | Professional Counselor | Lincoln Park, NJ | 2012 |
| Gail Greenspan, M.D. | 1093760563 | Psychiatry Physician | Phila, PA | 2006 |
| Gary Greenspan, MD | 1164468120 | Internal Medicine Physician | Warrensville Hts, OH | 2006 |
| Gary Greenspan, MD | 1992704498 | Pulmonary Disease Physician | Dunedin, FL | 2005 |
| Gerald Greenspan, MA | 1902128796 | Marriage & Family Therapist | Los Angeles, CA | 2010 |
| Hannah Greenspan, LMHC | 1255045506 | Mental Health Counselor | Mount Kisco, NY | 2023 |
| Harold Greenspan, M.D. | 1457326076 | Internal Medicine Physician | Chestnut Hill, MA | 2006 |
| Heather Greenspan, M.D. | 1346561990 | Psychiatry Physician | Durham, NC | 2010 |
| Hollis Greenspan | 1578901823 | Clinical Social Worker | Westfield, MA | 2013 |
| Howard Greenspan, DC | 1053440339 | Chiropractor | Brooklyn, NY | 2007 |
| Irwin Greenspan, MD | 1730241621 | Ophthalmology Physician | Bayside, NY | 2006 |
| Ivan Greenspan, PSY.D. | 1013154301 | Clinical Psychologist | Sherman Oaks, CA | 2009 |
| Jack Greenspan, DDS | 1497962120 | General Practice Dentistry | Cheshire, CT | 2007 |
| Jack Greenspan, MD | 1548233620 | Diagnostic Radiology Physician | Zanesville, OH | 2006 |
| Jackie Greenspan | 1447802350 | Social Worker | Beverly Hills, CA | 2019 |
| Jacob Greenspan, D.P.M. | 1194725523 | Podiatrist | Northbrook, IL | 2005 |
| Jacob Greenspan, DO | 1215631957 | Student in an Organized Health Care Education/Training Program | San Antonio, TX | 2023 |
| Jacob Greenspan, MD | 1992445399 | Student in an Organized Health Care Education/Training Program | Bronx, NY | 2022 |
| James Greenspan, MD | 1366432734 | Neurological Surgery Physician | Glens Falls, NY | 2005 |
| Jamie Greenspan, MSW, LCSW, LCADC | 1497726087 | Clinical Social Worker | Fort Dix, NJ | 2006 |
| Jason Greenspan, M.D. | 1780626697 | Emergency Medicine Physician | Tarzana, CA | 2006 |
| Jay Greenspan, PT | 1033173026 | Specialist | Emerson, NJ | 2006 |
| Jay Greenspan, MD | 1639234594 | Neonatal-Perinatal Medicine Physician | Philadelphia, PA | 2006 |
| Jeffrey Greenspan, D.O. | 1356376479 | Gastroenterology Physician | Philadelphia, PA | 2006 |
| Jeffrey Greenspan, MD | 1780602847 | Emergency Medicine Physician | Indianapolis, IN | 2006 |
| Jessica Greenspan | 1215653332 | Behavior Technician | Elk Grove, CA | 2022 |
| Joel Greenspan, MD | 1235206475 | Specialist | New Rochelle, NY | 2006 |
| Joel Greenspan, M.D. | 1417907205 | Infectious Disease Physician | Port Washington, NY | 2006 |
| Joel Greenspan, M.D. | 1821248097 | Public Health & General Preventive Medicine Physician | Atlanta, GA | 2008 |
| Joshua Greenspan, MD | 1215978861 | Gastroenterology Physician | Paramus, NJ | 2006 |
| Joshua Greenspan, M.D. | 1962457218 | Pain Medicine (Anesthesiology) Physician | Portsmouth, NH | 2006 |
| Julia Greenspan, ND - NATUROPATHIC DO | 1083738330 | Naturopath | Amhurst, NH | 2007 |
| Julie Greenspan | 1922786177 | Speech-Language Pathologist | Monticello, NY | 2023 |
| Katelyn Greenspan, MA, LMFT | 1225515430 | Marriage & Family Therapist | San Pedro, CA | 2018 |
| Kevin Greenspan, D.C. | 1942258611 | Chiropractor | Black Mountain, NC | 2006 |
| Kiefer Greenspan | 1629573464 | Psychiatry Physician | Irvine, CA | 2018 |
| Kristin Greenspan, RD | 1245269828 | Registered Dietitian | New York, NY | 2006 |
| Larry Greenspan, OPTICIAN | 1124143367 | Optician | Cedarhurst, NY | 2007 |
| Lauren Greenspan, RDN | 1396120887 | Registered Dietitian | Rahway, NJ | 2015 |
| Layla Greenspan, OTR/L | 1770958340 | Occupational Therapist | Lakewood, NJ | 2015 |
| Leah Greenspan, DO | 1952310757 | Neonatal-Perinatal Medicine Physician | Silver Spring, MD | 2006 |
| Leslie Greenspan, MD | 1881623379 | Psychiatry Physician | Madison, WI | 2006 |
| Linda Greenspan, D.O. | 1528099462 | Family Medicine Physician | Burgaw, NC | 2006 |
| Lola Greenspan, MFT | 1952513426 | Marriage & Family Therapist | Los Angeles, CA | 2007 |
| Louis Greenspan, PT | 1598735425 | Physical Therapist | Far Rockaway, NY | 2006 |
| Louise Greenspan, MD | 1487732012 | Pediatric Endocrinology Physician | San Francisco, CA | 2006 |
| Lynn Greenspan | 1851492565 | Optometrist | Philadelphia, PA | 2006 |
| Marie Greenspan, PHD, MSCP | 1184616765 | Prescribing (Medical) Psychologist | Albuquerque, NM | 2005 |
| Mark Greenspan, MSPT | 1801965074 | Physical Therapist | Roswell, GA | 2006 |
| Marlene Greenspan, LCSW | 1376682831 | Clinical Social Worker | Gainesville, FL | 2007 |
| Matthew Greenspan, M.D. | 1063505568 | Diagnostic Radiology Physician | Southfield, MI | 2006 |
| Maxwell Greenspan, LCSW | 1447502844 | Clinical Social Worker | Philadelphia, PA | 2012 |
| Mechelle Greenspan, L.AC. | 1841531654 | Acupuncturist | Los Angeles, CA | 2013 |
| Melanie Greenspan, MS, CF-SLP | 1518484575 | Speech-Language Pathologist | Chicago, IL | 2017 |
| Melissa Greenspan, APRN | 1699230508 | Family Nurse Practitioner | Colorado Springs, CO | 2019 |
| Melissa Greenspan, MD | 1750368080 | Family Medicine Physician | Huntington, MA | 2005 |
| Melvin Greenspan, D.D.S., | 1184837171 | Endodontics | Manhattan Beach, CA | 2007 |
| Michael Greenspan, MD | 1164442802 | Psychiatry Physician | Glen Oaks, NY | 2006 |
| Michael Greenspan | 1689028409 | Pharmacist | Fairfield, CT | 2016 |
| Michael Greenspan, MD | 1942520127 | Gastroenterology Physician | Elmhurst, IL | 2010 |
| Michal Greenspan, SLP | 1952254518 | Speech-Language Pathologist | Brooklyn, NY | 2026 |
| Michelle Greenspan, BCBA | 1558549527 | Behavior Analyst | Las Cruces, NM | 2008 |
| Michelle Greenspan, D.C. | 1740253467 | Chiropractor | Asheville, NC | 2006 |
| Mindy Greenspan, PT | 1982636254 | Physical Therapist | Livingston, NJ | 2006 |
| Mitchell Greenspan, MD | 1275533218 | Cardiovascular Disease Physician | Sellersville, PA | 2005 |
| Molly Greenspan | 1962214445 | Physical Therapist | Philadelphia, PA | 2025 |
| Monte Greenspan, L.C.S.W. | 1295958189 | Mental Health Counselor | Whittier, CA | 2007 |
| Nadia Greenspan, LPC NCC | 1972968311 | Addiction (Substance Use Disorder) Counselor | Des Plaines, IL | 2015 |
| Nancy Greenspan, LMSW | 1912010174 | Clinical Social Worker | Seaford, NY | 2006 |
| Neil Greenspan, M.D. | 1023007556 | Gastroenterology Physician | Providence, RI | 2005 |
| Neil Greenspan, MD | 1386663938 | Clinical Pathology/Laboratory Medicine Physician | Cleveland, OH | 2006 |
| Nikki Greenspan | 1093414534 | Emergency Medicine Physician | Jbsa Ft Sam Houston, TX | 2023 |
| Noah Greenspan, DPT | 1841359098 | Physical Therapist | New York, NY | 2006 |
| Pam Greenspan, AU.D. | 1275663858 | Audiologist | Ardsley, NY | 2007 |
| Patricia Greenspan, OTR/L | 1922373307 | Occupational Therapist | Bellerose, NY | 2012 |
| Peter Greenspan, MD | 1295725885 | Pediatrics Physician | Waltham, MA | 2005 |
| Peter Greenspan, M.D. | 1396718227 | Obstetrics & Gynecology Physician | Kansas City, MO | 2006 |
| Philip Greenspan, MD | 1568543288 | Pulmonary Disease Physician | Fairfield, CT | 2006 |
| Phyllis Greenspan, MSW | 1285774018 | Clinical Social Worker | Waltham, MA | 2007 |
| Phyllis Greenspan, SLP | 1669613659 | Speech-Language Pathologist | Brooklyn, NY | 2009 |
| Rachel Greenspan, LCPC | 1003030958 | Professional Counselor | Chicago, IL | 2007 |
| Rachel Greenspan, MS, RD, CDN | 1275998379 | Registered Dietitian | Bronx, NY | 2015 |
| Rachel Greenspan, PHD | 1639795958 | Psychoanalyst | Kingston, NY | 2020 |
| Rebecca Greenspan, DO | 1831727114 | Physical Medicine & Rehabilitation Physician | Boston, MA | 2020 |
| Rebekah Greenspan, MD | 1902791809 | Internal Medicine Physician | Saint Louis, MO | 2025 |
| Rena Greenspan, MSED | 1659632560 | Specialist | Far Rockaway, NY | 2012 |
| Renata Greenspan, MD | 1780668756 | Anatomic Pathology & Clinical Pathology Physician | Washington, DC | 2005 |
| Rhoda Greenspan, MSW, LICSW | 1902807761 | Clinical Social Worker | Newton, MA | 2005 |
| Richard Greenspan, RPH | 1538374079 | Pharmacist | Rutland, VT | 2007 |
| Richard Greenspan, D.D.S. | 1740319086 | General Practice Dentistry | Sarasota, FL | 2007 |
| Rivka Greenspan, MSED | 1114355153 | Specialist | Brooklyn, NY | 2013 |
| Robert Greenspan, MD | 1811995467 | Nephrology Physician | Fairfax, VA | 2005 |
| Robin Greenspan, MD | 1023012382 | Diagnostic Radiology Physician | Pittsburgh, PA | 2005 |
| Robin Greenspan, D.D.S. | 1306028881 | Dentist | Cockeysville, MD | 2007 |
| Roman Greenspan, MD | 1265499594 | Family Medicine Physician | West Point, NY | 2006 |
| Ronald Greenspan, O.D. | 1194714121 | Optometrist | Chicago Heights, IL | 2005 |
| Ronald Greenspan, DDS | 1407076532 | Orthodontics and Dentofacial Orthopedics Dentistry | San Diego, CA | 2007 |
| Ronald Greenspan, DDS | 1992917124 | Orthodontics and Dentofacial Orthopedics Dentistry | Haddon Township, NJ | 2007 |
| Samuel Greenspan, B.A. | 1760753883 | Occupational Therapist | Portland, OR | 2012 |
| Sandra Greenspan, PA | 1790820892 | Physician Assistant | Wixom, MI | 2007 |
| Sarah Greenspan | 1205189628 | Registered Nurse | Brooklyn, NY | 2012 |
| Sarah Greenspan, OTR/L | 1811207376 | Occupational Therapist | Lakewood, NJ | 2010 |
| Sarah Greenspan, LMHC | 1922614247 | Mental Health Counselor | Rutland, VT | 2020 |
| Sasha Greenspan | 1114388147 | Clinical Social Worker | White Plains, NY | 2016 |
| Scott Greenspan, M.H.C. | 1326399031 | Mental Health Counselor | Brockton, MA | 2012 |
| Scott Greenspan, MD | 1427049071 | Family Medicine Physician | San Juan Capistrano, CA | 2005 |
| Scott Greenspan, PH.D. | 1891132676 | Psychologist | Boston, MA | 2013 |
| Seth Greenspan | 1407559636 | Student in an Organized Health Care Education/Training Program | Stony Brook, NY | 2023 |
| Shaina Greenspan, RD | 1073051421 | Registered Dietitian | Seattle, WA | 2017 |
| Sheldon Greenspan, O.D. | 1346243193 | Optometrist | Parsippany, NJ | 2005 |
| Sheldon Greenspan, MD | 1508836370 | Adult Medicine Physician | Williston Park, NY | 2006 |
| Sheldon Greenspan, D. D. S. | 1619167293 | General Practice Dentistry | Elmwood Park, NJ | 2007 |
| Stacy Greenspan, DO | 1336124825 | Diagnostic Radiology Physician | Colorado Springs, CO | 2005 |
| Stephanie Greenspan, M.S., R.D. | 1164705067 | Registered Dietitian | Teaneck, NJ | 2011 |
| Stephanie Greenspan | 1295512481 | Behavior Technician | Santa Rosa, CA | 2023 |
| Stephanie Greenspan, PT | 1376557686 | Physical Therapist | Oakland, CA | 2006 |
| Stephen Greenspan, M.D. | 1255366845 | Internal Medicine Physician | Philadelphia, PA | 2006 |
| Steven Greenspan, O.D., PH.D. | 1205951647 | Optometrist | Skokie, IL | 2007 |
| Susan Greenspan | 1174596076 | Specialist | Pittsburgh, PA | 2006 |
| Sydney Greenspan, OTR/L | 1245700392 | Occupational Therapist | Inman, SC | 2018 |
| Terry Greenspan | 1548306939 | Military Health Care Provider | Staten Island, NY | 2007 |
| Tricia Greenspan | 1831744630 | Behavior Technician | Farmington Hills, MI | 2019 |
| Warren Greenspan, M.D. | 1497816474 | Anesthesiology Physician | Long Beach, NY | 2006 |
| Arden Greenspan Goldberg, LCSW MSW | 1083817928 | Clinical Social Worker | New City, NY | 2007 |
| Emily Greenspan Johnson, LICSW | 1942689245 | Clinical Social Worker | Brockton, MA | 2015 |
| Alison Greenspon | 1487808945 | Speech-Language Pathologist | Old Bethpage, NY | 2008 |
| Andrew Greenspon, DO | 1295298057 | Student in an Organized Health Care Education/Training Program | Akron, OH | 2019 |
| Arnold Greenspon, M.D. | 1639193162 | Clinical Cardiac Electrophysiology Physician | Philadelphia, PA | 2006 |
| Arthur Greenspon, LADC | 1801166905 | Addiction (Substance Use Disorder) Counselor | New Canaan, CT | 2012 |
| Barbara Greenspon, M.A. | 1154355246 | Marriage & Family Therapist | Minneapolis, MN | 2006 |
| Carolyn Greenspon, LICSW | 1831263516 | Clinical Social Worker | Wellesley, MA | 2006 |
| Chelsea Greenspon, PSY.D. | 1811471519 | Clinical Psychologist | Philadelphia, PA | 2018 |
| Dayna Greenspon, LCSW | 1699375014 | Clinical Social Worker | Philadelphia, PA | 2020 |
| Fred Greenspon, D.D.S.0602 | 1316104938 | Dentist | Washington, DC | 2008 |
| James Greenspon, MD | 1861547952 | Family Medicine Physician | Lansing, IL | 2007 |
| Lee Greenspon, M.D. | 1164467122 | Pulmonary Disease Physician | Wynnewood, PA | 2006 |
| Nancy Greenspon, MD | 1891212999 | Anesthesiology Physician | Chicago, IL | 2017 |
| Pamela Greenspon, M.D. | 1245290774 | Pediatrics Physician | Las Vegas, NV | 2006 |
| Thomas Greenspon, PH.D. | 1396775235 | Marriage & Family Therapist | Minneapolis, MN | 2006 |
| Yosef Greenspon, MD | 1942364690 | Pediatric Surgery Physician | Tampa, FL | 2006 |
| Danielle Greenspon Wohlleben, M.A. CCC/SLP | 1033364559 | Speech-Language Pathologist | Rockville Centre, NY | 2008 |
| Binyamin Greenspoon | 1356762009 | Clinical Social Worker | Lakewood, NJ | 2013 |
| Gail Greenspoon, E.D.D. | 1043411788 | Psychologist | Boca Raton, FL | 2007 |
| Jaime Greenspoon, D.M.D. | 1710118930 | Student in an Organized Health Care Education/Training Program | Rochester, NY | 2009 |
| Jeffrey Greenspoon, MD | 1982604088 | Orthopaedic Surgery Physician | Bradenton, FL | 2005 |
| Joshua Greenspoon, MD | 1689103731 | Orthopaedic Surgery Physician | Bradenton, FL | 2017 |
| Katie Greenspoon, L.C.S.W | 1639472764 | Clinical Social Worker | Boca Raton, FL | 2010 |
| Lauren Greenspoon | 1811743487 | Counselor | Hattiesburg, MS | 2024 |
| Laurence Greenspoon, M.D. | 1922015163 | Family Medicine Physician | Vero Beach, FL | 2006 |
| Sevasti Greenspoon | 1205295458 | Family Nurse Practitioner | Chicago, IL | 2016 |
| Aaron Greenspun, MD | 1326784083 | Anesthesiology Physician | Boston, MA | 2022 |
| Abby Greenspun, MS, RD, CDN | 1205589751 | Registered Dietitian | Westport, CT | 2022 |
| Aida Greenspun, LCSW | 1477798874 | Clinical Social Worker | East Brunswick, NJ | 2008 |
| Benjamin Greenspun | 1871172056 | Student in an Organized Health Care Education/Training Program | New York, NY | 2021 |
| Daniel Greenspun, PH.D. | 1245511849 | Clinical Psychologist | New York, NY | 2011 |
| David Greenspun, M.D. | 1336248970 | Plastic Surgery Physician | Greenwich, CT | 2006 |
| Harry Greenspun, M.D. | 1104081694 | Anesthesiology Physician | Bethesda, MD | 2008 |
| Jack Greenspun | 1245315415 | Mental Health Counselor | Escondido, CA | 2006 |
| Jennifer Greenspun, LCSW-C | 1861953093 | Clinical Social Worker | Glen Burnie, MD | 2019 |
| Richard Greenspun, MD | 1417984600 | Internal Medicine Physician | Santa Monica, CA | 2006 |
| Ronald Greenspun, MFT | 1881711760 | Marriage & Family Therapist | Long Beach, CA | 2007 |
| Wendy Greenspun, PH.D. | 1336262617 | Clinical Psychologist | New York, NY | 2007 |
| Sabrina Greenspun-Levitt, OD | 1699891515 | Optometrist | Towson, MD | 2007 |
| Kenneth Greenstadt, D.D.S. | 1538140595 | Pediatric Dentistry | Torrance, CA | 2005 |
| William Greenstadt, PH.D. | 1922021559 | Psychoanalysis Psychologist | New York, NY | 2006 |
| Aaron Greenstein, MD | 1154856425 | Geriatric Psychiatry Physician | Denver, CO | 2017 |
| Adara Greenstein | 1023949872 | Case Manager/Care Coordinator | Springfield, VT | 2026 |
| Alexa Greenstein, NP | 1528503000 | Family Nurse Practitioner | New York, NY | 2016 |
| Alexander Greenstein, M.D. | 1457746794 | Orthopaedic Surgery Physician | Dallas, TX | 2015 |
| Alexander Greenstein, M.D. | 1992964035 | Surgery Physician | New York, NY | 2008 |
| Alexis Greenstein | 1558086439 | Adult Companion | Bismarck, ND | 2022 |
| Aliza Greenstein | 1730624503 | Speech-Language Pathologist | New York, NY | 2017 |
| Allison Greenstein | 1558845677 | Behavior Technician | Simi Valley, CA | 2018 |
| Andrew Greenstein, DMD | 1154485258 | Endodontics | King Of Prussia, PA | 2006 |
| Annette Greenstein, MD | 1982761821 | Obstetrics & Gynecology Physician | Farmington Hills, MI | 2007 |
| Barbara Greenstein, PH.D | 1861414245 | Clinical Psychologist | Alameda, CA | 2006 |
| Barry Greenstein, BA | 1699043489 | Case Manager/Care Coordinator | Chester, PA | 2011 |
| Basya Greenstein, MSED | 1770830143 | Behavior Analyst | Lakewood, NJ | 2012 |
| Batsheva Greenstein, MS.ED | 1326391210 | Specialist | New York, NY | 2012 |
| Benjamin Greenstein, D.M.D. | 1205934759 | Periodontics | Freehold, NJ | 2006 |
| Beth Greenstein, LCSW | 1598780595 | Clinical Social Worker | Pompano Beach, FL | 2006 |
| Bruce Greenstein | 1215006077 | Plastic Surgery Physician | Bronx, NY | 2006 |
| Bruce Greenstein, D.M.D. | 1235347824 | General Practice Dentistry | Miami, FL | 2007 |
| Bruce Greenstein, D.M.D. | 1619047487 | General Practice Dentistry | Denver, CO | 2006 |
| Caitlin Greenstein, DPT | 1790007490 | Physical Therapist | Cary, NC | 2010 |
| Caren Greenstein, M.D. | 1811930910 | Diagnostic Radiology Physician | White Plains, NY | 2006 |
| Carly Greenstein, DMD | 1831944750 | Dentist | Lawrence Township, NJ | 2024 |
| Carmen Greenstein, LCSW | 1407028749 | Clinical Social Worker | Mahopac, NY | 2008 |
| Cheryl Greenstein, P.A | 1467541060 | Physician Assistant | Springfield, MA | 2006 |
| Cyndi Greenstein | 1588857502 | School Counselor | Oakland, CA | 2007 |
| Daniel Greenstein, MD | 1053761288 | Emergency Medicine Physician | New Haven, CT | 2016 |
| Daniel Greenstein, D.D.S | 1255397360 | General Practice Dentistry | Halifax, MA | 2006 |
| Daniel Greenstein, D.D.S. | 1457571564 | Dentist | Ocala, FL | 2007 |
| Daniel Greenstein, M.S. | 1609228519 | Mental Health Counselor | West Hartford, CT | 2016 |
| Daniel Greenstein, PSY.D. | 1952137622 | Clinical Psychologist | Lincolnwood, IL | 2024 |
| David Greenstein, M.D. | 1205931789 | Dermatology Physician | Beverly, MA | 2006 |
| David Greenstein, MD | 1235246281 | Gastroenterology Physician | Atlanta, GA | 2006 |
| David Greenstein, EMT-P | 1376416081 | Paramedic | Tamarac, FL | 2025 |
| David Greenstein, O.D. , M. S. | 1376518332 | Optometrist | West Roxbury, MA | 2006 |
| David Greenstein | 1467105288 | Mental Health Counselor | McMinnville, OR | 2022 |
| David Greenstein | 1578023826 | Anesthesiology Physician | Los Angeles, CA | 2019 |
| David Greenstein, DPM | 1952227274 | Foot & Ankle Surgery Podiatrist | Miami, FL | 2026 |
| Debra Greenstein, M.D. | 1093779530 | Pediatrics Physician | Boulder, CO | 2006 |
| Dena Greenstein, MS EDU | 1184986044 | Specialist | Brooklyn, NY | 2012 |
| Donald Greenstein, MD | 1235181587 | Diagnostic Radiology Physician | Brockton, MA | 2006 |
| Eileen Greenstein | 1508129891 | Specialist | New City, NY | 2012 |
| Elizabeth Greenstein, M.D. | 1427085612 | Diagnostic Radiology Physician | River Vale, NJ | 2006 |
| Emily Greenstein, MD | 1053560763 | Pediatric Cardiology Physician | Worcester, MA | 2008 |
| Emily Greenstein, APRN, AGNP-C | 1205364403 | Nurse Practitioner | Fargo, ND | 2017 |
| Emily Greenstein | 1326145715 | Acupuncturist | Cambridge, MA | 2006 |
| Emma Greenstein | 1962178236 | Physical Therapy Assistant | Philadelphia, PA | 2021 |
| Ericka Greenstein, MSW | 1992725923 | Clinical Social Worker | Havertown, PA | 2006 |
| Erin Greenstein | 1124527882 | Occupational Therapist | Andover, MA | 2018 |
| Erwin Greenstein | 1972918621 | Pharmacist | Waltham, MA | 2014 |
| Eryn Greenstein, LPC | 1831422922 | Counselor | Greensboro, NC | 2009 |
| Eugene Greenstein, MD | 1487666087 | Clinical Cardiac Electrophysiology Physician | Winfield, IL | 2006 |
| Evelyn Greenstein, M.S.,CCC,SLP | 1205080330 | Speech-Language Pathologist | Brooklyn, NY | 2008 |
| Faigie Greenstein, DPT | 1528847035 | Physical Therapist | Orangeburg, NY | 2023 |
| Frances Greenstein, LPC, LMFT | 1336233568 | Counselor | Charlottesville, VA | 2006 |
| Francine Greenstein, MFT | 1700077146 | Marriage & Family Therapist | Las Vegas, NV | 2007 |
| Frederick Greenstein, M.D. | 1174583686 | Urology Physician | Brooklyn, NY | 2006 |
| Gale Greenstein | 1669831954 | Clinical Social Worker | Silver Spring, MD | 2016 |
| Gary Greenstein, M.D. | 1235111493 | Obstetrics & Gynecology Physician | Lakewood, NJ | 2005 |
| Gary Greenstein, D.C. | 1447251087 | Chiropractor | Woodbury, CT | 2005 |
| Gary Greenstein, DDS MS | 1992835029 | Periodontics | Freehold, NJ | 2007 |
| Gayle Greenstein, MED CCC-SLP | 1871616425 | Speech-Language Pathologist | Sharon, MA | 2007 |
| Haley Greenstein, LMT | 1548783418 | Massage Therapist | Portland, OR | 2017 |
| Ian Greenstein | 1952980633 | Pharmacist | Falmouth, ME | 2021 |
| Irene Greenstein, PT | 1235317199 | Physical Therapist | Brooklyn, NY | 2008 |
| Isaak Greenstein | 1780008094 | Optician | Dallas, TX | 2014 |
| Jamie Greenstein, MS, RD | 1932731163 | Registered Dietitian | Hawthorn Woods, IL | 2020 |
| Jane Greenstein, PH.D. | 1104186386 | Clinical Child & Adolescent Psychologist | Boston, MA | 2012 |
| Jay Greenstein, DC, PT, | 1154392694 | Chiropractor | Rockville, MD | 2006 |
| Jay Greenstein, MD | 1982615696 | General Practice Physician | Bakersfield, CA | 2006 |
| Jeffrey Greenstein, M.D. | 1790991164 | Neurology Physician | Philadelphia, PA | 2007 |
| Jeffrey Greenstein, DDS | 1831255579 | General Practice Dentistry | Pasadena, MD | 2006 |
| Jeffrey Greenstein | 1922372820 | Case Manager/Care Coordinator | San Diego, CA | 2012 |
| Jodi Greenstein, LICSW | 1669421673 | Clinical Social Worker | Golden Valley, MN | 2006 |
| Joette Greenstein, DO | 1841270758 | Family Medicine Physician | Newark, OH | 2006 |
| Jonathan Greenstein, PH.D. | 1316192891 | Psychologist | Tampa, FL | 2008 |
| Joseph Greenstein, RPH | 1053611954 | Pharmacist | Los Angeles, CA | 2010 |
| Joseph Greenstein, MD | 1588451330 | Student in an Organized Health Care Education/Training Program | Memphis, TN | 2025 |
| Joshua Greenstein, M.D. | 1104881457 | Nephrology Physician | Escondido, CA | 2006 |
| Joshua Greenstein, M.D. | 1164788980 | Emergency Medicine Physician | Staten Island, NY | 2012 |
| Joshua Greenstein, M.D. | 1396124111 | Diagnostic Radiology Physician | Chicago, IL | 2015 |
| Justin Greenstein, PH.D. | 1396047858 | Clinical Psychologist | Chicago, IL | 2010 |
| Karen Greenstein, LMFT | 1245958735 | Counselor | Tamarac, FL | 2022 |
| Karena Greenstein, O.D. | 1306127998 | Optometrist | Dallas, TX | 2011 |
| Kathryn Greenstein, PARAMEDIC | 1750201091 | Paramedic | Amherst, VA | 2026 |
| Kaylee Greenstein | 1437545548 | Occupational Therapist | Stafford, TX | 2015 |
| Lael Greenstein, M.D. | 1164867701 | Family Medicine Physician | Malden, MA | 2013 |
| Lawrence Greenstein, LCSW | 1447688635 | Clinical Social Worker | Trenton, NJ | 2013 |
| Lewis Greenstein, M.D. | 1164419651 | Anesthesiology Physician | Escondido, CA | 2005 |
| Lisa Greenstein, MPH, LSW | 1285198374 | Clinical Social Worker | Chatham, NJ | 2019 |
| Lisa Greenstein | 1760996417 | Dentist | Denver, CO | 2017 |
| Marc Greenstein, DO | 1154383743 | Urology Physician | Atlanta, GA | 2006 |
| Marc Greenstein, MD | 1164402764 | Internal Medicine Physician | Pembroke Pines, FL | 2006 |
| Marc Greenstein, DO | 1346354404 | Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician | Rochester, NY | 2006 |
| Marc Greenstein, LAC. | 1740720986 | Acupuncturist | Rocky Point, NY | 2017 |
| Mark Greenstein, D.M.D. | 1003971938 | General Practice Dentistry | Clinton, MD | 2006 |
| Mark Greenstein, CO | 1497179899 | Orthotist | Spring, TX | 2014 |
| Mark Greenstein, MD | 1881692721 | Developmental - Behavioral Pediatrics Physician | Hartford, CT | 2005 |
| Mark Greenstein, R.PH. | 1962615740 | Pharmacist | Rochester, NY | 2007 |
| Marsha Greenstein, PH.D. | 1407950439 | Psychologist | Waban, MA | 2006 |
Source: CMS National Plan and Provider Enumeration System (NPPES) (download.cms.gov). A listing is not a recommendation: check a license with the state board (license lookups).