Providers John Duffy, D.C. to Michael Duffy, PA
300 individual NPIs in the federal registry, part 5,858 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. 97 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| John Duffy, D.C. | 1942481627 | Chiropractor | Waltham, MA | 2007 |
| Jordan Duffy, PT, DPT | 1558555383 | Physical Therapist | Bel Air, MD | 2007 |
| Joseph Duffy, M.D. | 1033117171 | Family Medicine Physician | Wayne, NJ | 2005 |
| Joseph Duffy, M.D. | 1386897544 | Pulmonary Disease Physician | Columbus, OH | 2008 |
| Joseph Duffy, R. PH. | 1548913007 | Ambulatory Care Pharmacist | Novi, MI | 2022 |
| Joseph Duffy, M.D. | 1639220155 | Diagnostic Radiology Physician | Bellevue, WA | 2007 |
| Joseph Duffy, M.D. | 1770563769 | Rheumatology Physician | Rochester, MN | 2006 |
| Joseph Duffy, D. C. | 1780680157 | Chiropractor | Cherryville, NC | 2005 |
| Joseph Duffy, SLP | 1821226515 | Speech-Language Pathologist | Rochester, MN | 2009 |
| Josephine Duffy, CRNA | 1386684538 | Nurse Practitioner | Sarasota, FL | 2006 |
| Joshua Duffy, M.S. | 1285041368 | Specialist | Melville, NY | 2014 |
| Joshua Duffy, D.M.D., M.S. | 1508230012 | General Practice Dentistry | Loris, SC | 2015 |
| Joshua Duffy, DC | 1538363338 | Chiropractor | Hawthorne, NJ | 2007 |
| Joslyn Duffy | 1215763396 | Behavior Technician | Toledo, OH | 2024 |
| Judith Duffy, APRN BC | 1033327838 | Adult Health Nurse Practitioner | Boston, MA | 2007 |
| Julia Duffy, RDH | 1073899894 | Dental Hygienist | Portland, OR | 2011 |
| Julia Duffy, FNP-BC | 1083460265 | Family Medicine Physician | Atlanta, GA | 2024 |
| Julia Duffy | 1205650074 | Obstetrics & Gynecology Physician | Boston, MA | 2024 |
| Julia Duffy, LMHC | 1730033325 | Mental Health Counselor | Melrose, MA | 2026 |
| Julia Duffy, APRN | 1790716413 | Family Nurse Practitioner | Fairfield, CT | 2006 |
| Juliah Duffy, MS, OTR/L | 1801424361 | Occupational Therapist | Palm Coast, FL | 2020 |
| Julianne Duffy, PA-C | 1053646141 | Surgical Physician Assistant | Syracuse, NY | 2009 |
| Julie Duffy | 1194949420 | Mental Health Counselor | Cambridge, MA | 2007 |
| Julie Duffy | 1285408922 | Occupational Therapy Assistant | Vancouver, WA | 2023 |
| Julie Duffy, LPC | 1679959316 | Professional Counselor | Greenville, WI | 2015 |
| Julie Duffy, RDH, PHDH | 1780319343 | Dental Hygienist | Quincy, IL | 2022 |
| Julie Duffy | 1871194787 | Behavior Technician | King Of Prussia, PA | 2020 |
| Jurate Duffy, M.D. | 1790003671 | Hospitalist Physician | Port Angeles, WA | 2010 |
| Justin Duffy, PA-C | 1174918809 | Physician Assistant | McHenry, IL | 2015 |
| Justin Duffy | 1740024082 | Speech-Language Pathologist | Baltimore, MD | 2024 |
| Justine Duffy | 1336686864 | Physical Therapist | Hamilton, NJ | 2017 |
| Kaela Duffy | 1053149815 | Acute Care Nurse Practitioner | Center Valley, PA | 2024 |
| Kaitlin Duffy, DPT | 1730657727 | Physical Therapist | Boston, MA | 2018 |
| Kaitlyn Duffy, NMD | 1700493152 | Naturopath | Tempe, AZ | 2020 |
| Kalean Duffy, BA | 1275051278 | Counselor | Indiana, PA | 2017 |
| Kandee Duffy | 1023721958 | Behavior Technician | Baltimore, MD | 2023 |
| Kara Duffy, PA-C | 1336270438 | Physician Assistant | Portland, ME | 2007 |
| Kara Duffy, M.S., CF-SLP | 1376996405 | Speech-Language Pathologist | Leawood, KS | 2016 |
| Karen Duffy, MFTI | 1144551789 | Marriage & Family Therapist | Petaluma, CA | 2010 |
| Karen Duffy, REGISTERED DIETITIAN | 1154303030 | Registered Dietitian | Saint Augustine, FL | 2005 |
| Karen Duffy, MD | 1174543516 | General Practice Physician | Madison, TN | 2006 |
| Karen Duffy, CNP | 1457373615 | Family Nurse Practitioner | Cuyahoga Falls, OH | 2006 |
| Karen Duffy | 1588294581 | Acute Care Nurse Practitioner | Charlottesville, VA | 2020 |
| Karen Duffy, R.N.,M.S.,ANP,GCNS | 1811099716 | Adult Health Nurse Practitioner | Victor, NY | 2006 |
| Karen Duffy, CCC-SLP | 1861064933 | Speech-Language Pathologist | Grand Rapids, MI | 2021 |
| Karen Duffy, LPC, NCC | 1932424918 | Professional Counselor | Rochester Hills, MI | 2010 |
| Karin Duffy, PA-C | 1780638643 | Physician Assistant | Columbia, SC | 2006 |
| Karol Duffy, NP | 1225606338 | Family Nurse Practitioner | South Riding, VA | 2021 |
| Kate Duffy | 1457804064 | Speech-Language Pathologist | Lincoln, MA | 2016 |
| Kate Duffy | 1588205322 | Physical Therapist | Charlotte, NC | 2019 |
| Katharine Duffy | 1194587931 | Student in an Organized Health Care Education/Training Program | Bronx, NY | 2024 |
| Katherine Duffy, AUD | 1407376080 | Audiologist | Bel Air, MD | 2017 |
| Katherine Duffy, LCSW | 1437205622 | Clinical Social Worker | Belmar, NJ | 2007 |
| Katherine Duffy, R.N. | 1588910004 | Registered Nurse | Lowell, MA | 2012 |
| Katherine Duffy, PA-C | 1598482689 | Physician Assistant | New York, NY | 2022 |
| Katherine Duffy, M.A. | 1619263316 | Speech-Language Pathologist | Venice, CA | 2011 |
| Katherine Duffy | 1710619820 | Behavior Technician | Saint Paul, MN | 2022 |
| Katherine Duffy, M.D. | 1740216357 | Psychiatry Physician | Rochester, NY | 2006 |
| Katherine Duffy | 1851469969 | Mental Health Counselor | Richmond, IN | 2006 |
| Katherine Duffy, DDS | 1851519037 | General Practice Dentistry | Kalamazoo, MI | 2007 |
| Katherine Duffy, M.D. | 1881012433 | Family Medicine Physician | Los Angeles, CA | 2014 |
| Katherine Duffy | 1932863537 | Behavior Analyst | Rockville, MD | 2021 |
| Katherine Duffy | 1952726184 | Clinical Social Worker | Valhalla, NY | 2014 |
| Kathleen Duffy, MSS, LSW | 1104477645 | Clinical Social Worker | Philadelphia, PA | 2019 |
| Kathleen Duffy, PA-C | 1154301141 | Physician Assistant | Boise, ID | 2006 |
| Kathleen Duffy, SLP | 1285031864 | Speech-Language Pathologist | Fall River, MA | 2014 |
| Kathleen Duffy, PH.D. | 1326283813 | Psychologist | Summit, WI | 2008 |
| Kathleen Duffy, LAC. | 1417587742 | Acupuncturist | Austin, TX | 2020 |
| Kathleen Duffy, MSW, LICSW | 1619452521 | Clinical Social Worker | Minnetonka, MN | 2018 |
| Kathleen Duffy, RD., LDN | 1659771897 | Registered Dietitian | Oak Park, IL | 2014 |
| Kathleen Duffy | 1821722307 | Physical Therapy Assistant | Hampton, NH | 2022 |
| Kathleen Duffy, P.A.-C | 1851708291 | Physician Assistant | Clive, IA | 2014 |
| Kathleen Duffy, CERTIFIED SURGICAL F | 1962529800 | Surgical Physician Assistant | Port St Lucie, FL | 2007 |
| Kathleen Rose Duffy | 1518022359 | Counselor | Plymouth, MA | 2006 |
| Kathryn Duffy, LCSW | 1306105614 | Counselor | Jenkintown, PA | 2012 |
| Kathryn Duffy, RN | 1356082705 | Registered Nurse | Parma, OH | 2022 |
| Kathryn Duffy, LAC | 1891233631 | Acupuncturist | New York, NY | 2017 |
| Kathryn Duffy, DPT | 1932410503 | Physical Therapist | Sewickley, PA | 2010 |
| Kathy Duffy, COTA | 1912419532 | Occupational Therapy Assistant | Vernon, NJ | 2017 |
| Katie Duffy, PHYSICIAN ASSISTANT | 1184053860 | Physician Assistant | Dallas, TX | 2013 |
| Katie Duffy, OTR L | 1720186331 | Occupational Therapist | Golden Valley, MN | 2006 |
| Katie Duffy | 1962882662 | Clinical Social Worker | Raleigh, NC | 2015 |
| Katlyn Duffy, CRNP | 1053040311 | Family Nurse Practitioner | Lansdale, PA | 2022 |
| Katrina Duffy, PA-C | 1225988439 | Physician Assistant | Springfield, MO | 2026 |
| Kaylee Duffy, OTR/L | 1750273017 | Occupational Therapist | Township Of Washington, NJ | 2025 |
| Kaylin Duffy | 1871484550 | Behavior Analyst | Oceanside, NY | 2025 |
| Keira Duffy | 1265985329 | Occupational Therapist | Cary, NC | 2016 |
| Keith Duffy, M.D. | 1770779050 | MOHS-Micrographic Surgery Physician | Salt Lake City, UT | 2007 |
| Kelleigh Duffy | 1972025146 | Behavior Analyst | Natick, MA | 2017 |
| Kelli Duffy, COTA | 1447665617 | Occupational Therapy Assistant | Dearborn, MI | 2014 |
| Kellie Duffy, PA-C | 1982140646 | Medical Physician Assistant | Philadelphia, PA | 2017 |
| Kelly Duffy, RN | 1578948576 | Registered Nurse | Lockport, NY | 2015 |
| Kelly Duffy, MD | 1801187059 | Pediatrics Physician | Advance, NC | 2011 |
| Kelly Duffy, DPT | 1861094252 | Physical Therapist | Hilliard, OH | 2020 |
| Kelsey Duffy, PA-C | 1568127140 | Physician Assistant | Saint Louis, MO | 2021 |
| Kendra Duffy | 1891449260 | Developmental Therapist | Palm Harbor, FL | 2022 |
| Kendra Duffy | 1891663621 | Behavior Technician | Virginia Beach, VA | 2025 |
| Kenneth Duffy, M.D. | 1164421970 | Family Medicine Physician | Seiling, OK | 2005 |
| Kenneth Duffy | 1437561743 | Homemaker | Hialeah, FL | 2014 |
| Kenneth Duffy, P.T. | 1619292661 | Physical Therapist | Spring Hill, FL | 2010 |
| Kent Duffy, MD | 1508827452 | Neurological Surgery Physician | White Plains, NY | 2006 |
| Kerri Duffy, LPN | 1629703467 | Licensed Practical Nurse | Norwalk, OH | 2022 |
| Kerriann Duffy, M.S.,CCC-SLP | 1992939649 | Speech-Language Pathologist | Stamford, CT | 2009 |
| Kerry Duffy, PT | 1326187063 | Physical Therapist | Charlotte, NC | 2007 |
| Kerry Duffy, PA-S1 | 1619792934 | Student in an Organized Health Care Education/Training Program | Alhambra, CA | 2024 |
| Keven Duffy, LCSW | 1265814115 | Clinical Social Worker | New York, NY | 2015 |
| Kevin Duffy, PAC | 1164412565 | Physician Assistant | Lansing, MI | 2005 |
| Kevin Duffy | 1245629294 | Nurse's Aide | Newark, DE | 2015 |
| Kevin Duffy, AUD | 1245756253 | Audiologist | Missoula, MT | 2017 |
| Kevin Duffy | 1265254247 | Mental Health Counselor | Paramus, NJ | 2024 |
| Kevin Duffy, ATC | 1285877928 | Athletic Trainer | Brooklyn, NY | 2009 |
| Kevin Duffy, CDCA | 1508580952 | Addiction (Substance Use Disorder) Counselor | Brookpark, OH | 2022 |
| Kevin Duffy | 1518020007 | Physical Therapist | Oak Brook, IL | 2006 |
| Kevin Duffy | 1518488956 | Addiction (Substance Use Disorder) Counselor | Pittsburgh, PA | 2017 |
| Kevin Duffy, PSY.D. | 1578616603 | School Psychologist | Tonawanda, NY | 2007 |
| Kevin Duffy, D.D.S. | 1578719456 | Orthodontics and Dentofacial Orthopedics Dentistry | Broken Arrow, OK | 2008 |
| Kevin Duffy, M.D. | 1639743529 | Emergency Medicine Physician | Philadelphia, PA | 2021 |
| Kevin Duffy, MD | 1790907673 | Cardiovascular Disease Physician | Philadelphia, PA | 2007 |
| Kevin Duffy, PA | 1831754175 | Physician Assistant | Charlotte, NC | 2019 |
| Kevin Duffy, PT, DPT | 1851812770 | Physical Therapist | New Orleans, LA | 2017 |
| Kieran Duffy | 1386400422 | Behavior Technician | Salt Lake City, UT | 2024 |
| Kiersten Duffy, PA-C | 1851155634 | Physician Assistant | Highlands Ranch, CO | 2024 |
| Kimberly Duffy, FNP-BC | 1043543820 | Family Nurse Practitioner | Philadelphia, PA | 2009 |
| Kimberly Duffy, RDN, LD, CPT | 1336870336 | Registered Dietitian | White Bear Lake, MN | 2022 |
| Kimberly Duffy, MD | 1649731324 | Family Medicine Physician | Shirley, NY | 2019 |
| Kimberly Duffy, LPC | 1659066819 | Mental Health Counselor | San Antonio, TX | 2023 |
| Korbin Duffy, DC | 1841958865 | Chiropractor | Yellville, AR | 2021 |
| Kris Duffy, MA CCC/SLP-L | 1073985628 | Speech-Language Pathologist | McHenry, IL | 2015 |
| Kristen Duffy | 1073819132 | Peer Specialist | Riverside, CA | 2011 |
| Kristen Duffy, RN | 1194506998 | Registered Nurse | Poughkeepsie, NY | 2023 |
| Kristen Duffy, C.R.N.P. | 1205190618 | Adult Health Nurse Practitioner | Sacramento, CA | 2012 |
| Kristen Duffy, D.O. | 1598152316 | Internal Medicine Physician | Columbus, OH | 2015 |
| Kristen Duffy | 1720773138 | Mental Health Counselor | Yonkers, NY | 2023 |
| Kristie Duffy | 1053177196 | Community Health Worker | Cleveland, OH | 2024 |
| Kristin Duffy, PT | 1023554904 | Physical Therapist | Chillicothe, IL | 2017 |
| Kristin Duffy, PA-C | 1992015978 | Medical Physician Assistant | Sellersville, PA | 2010 |
| Kristina Duffy, MD | 1184695348 | Neurology Physician | Mobile, AL | 2006 |
| Kristyn Duffy, MSW | 1366061046 | Clinical Social Worker | Colorado Springs, CO | 2020 |
| Kyle Duffy | 1073929568 | Dentist | Orlando, FL | 2014 |
| Kyle Duffy | 1114336716 | Dentist | Mesa, AZ | 2014 |
| Kyle Duffy | 1972346518 | Optometrist | Tucson, AZ | 2024 |
| Lacey Duffy, APRN | 1386163327 | Family Nurse Practitioner | Mooreland, OK | 2017 |
| Lara Duffy, A.P.N. | 1033562236 | Nurse Practitioner | Lakewood, NJ | 2016 |
| Launa Duffy, LCPC | 1710516315 | Mental Health Counselor | Pocomoke City, MD | 2020 |
| Laura Duffy, L.M.T. | 1003244534 | Mechanotherapist | Washington, NJ | 2013 |
| Laura Duffy, MS | 1114020278 | Addiction (Substance Use Disorder) Counselor | Brookfield, CT | 2006 |
| Laura Duffy, PA | 1164570073 | Physician Assistant | San Diego, CA | 2007 |
| Laura Duffy, FNP | 1427502335 | Family Nurse Practitioner | Greenfield, MA | 2016 |
| Laura Duffy, MS | 1487434890 | Nutritionist | Colorado Springs, CO | 2023 |
| Laura Duffy, M.D. | 1568483998 | Psychiatry Physician | San Francisco, CA | 2006 |
| Laura Duffy, APN | 1598130379 | Pediatric Nurse Practitioner | Chicago, IL | 2015 |
| Laura Duffy, MA, LPC, LCADC | 1689260101 | Mental Health Counselor | Paramus, NJ | 2020 |
| Laura Duffy, PA-C | 1720288087 | Surgical Physician Assistant | San Diego, CA | 2007 |
| Laurel Duffy, MSOT, OTR/L | 1629670757 | Occupational Therapist | Delray Beach, FL | 2020 |
| Laurel Duffy | 1841982121 | Adult Health Nurse Practitioner | Plymouth, MA | 2023 |
| Lauren Duffy, DPT | 1306219647 | Physical Therapist | Chandler, AZ | 2015 |
| Lauren Duffy, PMHNP | 1346874898 | Psychiatric/Mental Health Nurse Practitioner | Wilmington, NC | 2020 |
| Lauren Duffy | 1447185277 | Mental Health Counselor | Chicago, IL | 2026 |
| Lauren Duffy, PA-C | 1497122964 | Medical Physician Assistant | Hanover, PA | 2015 |
| Lauren Duffy, MS, RDN | 1598372906 | Registered Dietitian | Sea Girt, NJ | 2020 |
| Lauren Duffy, DNP, APRN, FNP-C | 1639892078 | Family Nurse Practitioner | Tampa, FL | 2022 |
| Lauren Duffy, NP | 1811153125 | Family Nurse Practitioner | Memphis, TN | 2008 |
| Lauren Duffy, MA, LMHC | 1861831448 | Mental Health Counselor | Shrewsbury, MA | 2013 |
| Lauren Duffy, PA | 1902504087 | Medical Physician Assistant | Wausau, WI | 2023 |
| Lauren Duffy, MA, LPC | 1912561705 | Professional Counselor | Tucson, AZ | 2019 |
| Lauren Duffy, DPT | 1942600143 | Physical Therapist | Virginia Beach, VA | 2014 |
| Lauren Duffy | 1952005498 | Family Nurse Practitioner | Chino Hills, CA | 2023 |
| Lauren Duffy, MA, CCC-SLP | 1972269363 | Speech-Language Pathologist | Cedar Knolls, NJ | 2021 |
| Laurie Duffy, M.S. | 1386709731 | Audiologist-Hearing Aid Fitter | Warwick, RI | 2006 |
| Lawrence Duffy, D.M.D. | 1447306386 | General Practice Dentistry | Orlando, FL | 2007 |
| Liam Duffy, MD | 1902369820 | Otolaryngology Physician | Rapid City, SD | 2019 |
| Lian Duffy | 1730756735 | Community Health Worker | San Francisco, CA | 2021 |
| Lillian Duffy | 1932776689 | Clinical Social Worker | Aurora, CO | 2021 |
| Linda Duffy, LCSW | 1013053909 | Clinical Social Worker | Oakham, MA | 2007 |
| Linda Duffy, RPT | 1689155517 | Physical Therapist | Wareham, MA | 2018 |
| Linda Duffy, PA-C | 1831280114 | Physician Assistant | Wilmington, DE | 2006 |
| Lindsay Duffy, B.A. | 1629372271 | Clinical Psychologist | Northbrook, IL | 2010 |
| Lindsey Duffy, FNP | 1295211134 | Primary Care Nurse Practitioner | New Orleans, LA | 2018 |
| Lindsey Duffy, PT, DPT | 1578006656 | Physical Therapist | Brunswick, GA | 2016 |
| Lisa Duffy | 1316114176 | Pediatric Nurse Practitioner | Boston, MA | 2008 |
| Lisa Duffy, BSN, RN, CLC | 1316731169 | Lactation Consultant (Non-RN) | Marrero, LA | 2025 |
| Lisa Duffy, CRNP | 1508086398 | Family Nurse Practitioner | Edwardsville, PA | 2007 |
| Lisa Duffy, CCNS | 1609722271 | Registered Nurse | Leominster, MA | 2026 |
| Lisa Duffy, RN | 1639919350 | Community Health Registered Nurse | Charlotte, NC | 2024 |
| Logan Duffy | 1700619467 | Physical Therapist | Indian Trail, NC | 2024 |
| Lori Duffy, LICSW | 1851353973 | Clinical Social Worker | North Kingstown, RI | 2006 |
| Lucelita Duffy, PT | 1083836571 | Physical Therapist | River Forest, IL | 2007 |
| Lucie Duffy | 1992573836 | Student in an Organized Health Care Education/Training Program | Atlanta, GA | 2023 |
| Lydia Duffy, LICSW | 1285577338 | Clinical Social Worker | Birmingham, AL | 2026 |
| Lynn Duffy, LCSW | 1396339172 | Clinical Social Worker | Greensboro, NC | 2021 |
| Lynn Duffy, M.D. | 1790759124 | Pediatric Gastroenterology Physician | Fairfax, VA | 2006 |
| Lynn Duffy, PSY.D., LCPC, NCC, | 1902909823 | Mental Health Counselor | Pocomoke City, MD | 2006 |
| Lynn Duffy | 1952284903 | Behavior Technician | Monrovia, CA | 2025 |
| Lynne Duffy | 1548727597 | Student in an Organized Health Care Education/Training Program | Milford, CT | 2019 |
| Madison Duffy | 1083505499 | Registered Nurse | Arvada, CO | 2025 |
| Malia Duffy, RN | 1437293420 | Registered Nurse | Boston, MA | 2007 |
| Malika Duffy, MSW, LCSWA | 1427750868 | Clinical Social Worker | Concord, NC | 2023 |
| Mara Duffy, LCSW-C | 1699333930 | Clinical Social Worker | Annapolis, MD | 2019 |
| Mararet Duffy, RN, BSN,CDE | 1740473388 | Diabetes Educator Registered Nurse | Brockton, MA | 2007 |
| Marcus Duffy, DO | 1669316600 | Student in an Organized Health Care Education/Training Program | Cheyenne, WY | 2026 |
| Marcy Duffy, LPC, CACD, CCDPD | 1982914180 | Counselor | Scranton, PA | 2010 |
| Mardelyn Duffy, LPN | 1609114479 | Licensed Practical Nurse | Poughkeepsie, NY | 2013 |
| Margaret Duffy | 1104650878 | Mental Health Counselor | Easthampton, MA | 2024 |
| Margaret Duffy, P.A. - C | 1154366391 | Physician Assistant | Seattle, WA | 2006 |
| Margaret Duffy | 1376241257 | Behavior Technician | Columbia, MD | 2023 |
| Margaret Duffy, MD | 1518233881 | Nephrology Physician | Allentown, PA | 2012 |
| Margaret Duffy, ARNP | 1841293503 | Nurse Practitioner | Marshalltown, IA | 2005 |
| Margot Duffy | 1194439885 | Women's Health Nurse Practitioner | Chicago, IL | 2023 |
| Maria Duffy, LCPC | 1437463270 | Professional Counselor | Portland, ME | 2010 |
| Maria Duffy, C.N.M. | 1912117565 | Advanced Practice Midwife | Doylestown, PA | 2007 |
| Maribeth Duffy, MD | 1770669657 | Family Medicine Physician | Tacoma, WA | 2006 |
| Mariko Duffy | 1093335580 | Behavior Technician | Cottonwood Heights, UT | 2020 |
| Marit Duffy, M.D. | 1598927063 | Diagnostic Radiology Physician | Annapolis, MD | 2008 |
| Mark Duffy, RCIS | 1124834486 | Technician/Technologist | Bristol, TN | 2024 |
| Mark Duffy, DMD | 1194255513 | General Practice Dentistry | Columbus, OH | 2017 |
| Mark Duffy, MD | 1235167537 | Ophthalmic Plastic and Reconstructive Surgery Physician | Green Bay, WI | 2006 |
| Marla Duffy, RN | 1982472296 | Registered Nurse | Saranac Lake, NY | 2023 |
| Marlene Duffy, D.C. | 1770619371 | Chiropractor | Las Vegas, NV | 2007 |
| Martha Duffy, RD | 1245247170 | Registered Dietitian | Portland, OR | 2006 |
| Martha Duffy, PT, DPT | 1245632611 | Orthopedic Physical Therapist | Cincinnati, OH | 2014 |
| Martha Duffy, M.D. | 1821417379 | Family Medicine Physician | Boston, MA | 2014 |
| Mary Duffy | 1043548720 | Pharmacist | Henderson, NC | 2009 |
| Mary Duffy | 1386972701 | Clinical Social Worker | Round Rock, TX | 2009 |
| Mary Duffy, RN | 1497028955 | Registered Nurse | Sparks, NV | 2012 |
| Mary Duffy, AA | 1619625233 | Anesthesiologist Assistant | Summit, WI | 2022 |
| Mary Duffy, M.D. | 1730330028 | Contractor | Chattanooga, TN | 2008 |
| Mary Duffy, DNPC, FNP | 1851534671 | Psychiatric/Mental Health Nurse Practitioner | Hoboken, NJ | 2009 |
| Mary Duffy, D.D.S. | 1891839858 | General Practice Dentistry | Iowa City, IA | 2007 |
| Mary Duffy, PHD | 1952116147 | Clinical Psychologist | White City, OR | 2025 |
| Mary Ann Duffy | 1003181876 | School Registered Nurse | Brooklyn, NY | 2012 |
| Mary Ann Duffy, LICSW | 1285781815 | Clinical Social Worker | Fall River, MA | 2007 |
| Mary Anne Duffy, D.C. | 1255391470 | Chiropractor | Lancaster, PA | 2006 |
| Mary-Therese Duffy, LCPC | 1205968518 | Professional Counselor | Raymond, ME | 2007 |
| Maryanne Duffy, MFT #26013 | 1942919717 | Mental Health Counselor | Lakewood, CA | 2022 |
| Marybeth Duffy | 1396215430 | Clinical Social Worker | West Roxbury, MA | 2018 |
| Marykay Duffy, L.M.H.C. | 1588857007 | Mental Health Counselor | Scituate, MA | 2007 |
| Matthew Duffy, PH.D. | 1174849483 | Clinical Psychologist | Arlington, MA | 2010 |
| Matthew Duffy, BCBA | 1528668779 | Behavior Analyst | Stuart, FL | 2020 |
| Matthew Duffy, RADT | 1922861897 | Addiction (Substance Use Disorder) Counselor | San Luis Obispo, CA | 2024 |
| Maura Duffy | 1023430949 | Behavior Analyst | Independence, OH | 2014 |
| Maureen Duffy, RN WHNP | 1114916269 | Nurse Practitioner | Palatine, IL | 2005 |
| Maureen Duffy, LMSW | 1225231509 | Clinical Social Worker | Blue Point, NY | 2007 |
| Maureen Duffy | 1235558396 | Clinical Social Worker | Rocky Hill, CT | 2014 |
| Maureen Duffy, RN APN C | 1386721074 | Psychiatric/Mental Health Clinical Nurse Specialist | Millville, NJ | 2006 |
| Maureen Duffy, PH.D. | 1649093147 | Marriage & Family Therapist | Miami Shores, FL | 2024 |
| Maureen Duffy, PT, ATP | 1720298714 | Physical Therapist | South Windsor, CT | 2007 |
| Maya Duffy, MD | 1649110644 | Student in an Organized Health Care Education/Training Program | Tampa, FL | 2026 |
| Maya Duffy, LCSW | 1760859136 | Social Worker | Trenton, FL | 2015 |
| Mayela Duffy | 1932061009 | Critical Care Medicine Registered Nurse | Brownsville, TX | 2025 |
| McKenna Duffy | 1225908197 | Speech-Language Pathologist | Chicago, IL | 2025 |
| McKenna Duffy | 1497690705 | Emergency Registered Nurse | New York, NY | 2026 |
| Meaghan Duffy, LPC-IT | 1871285429 | Mental Health Counselor | Fitchburg, WI | 2023 |
| Megan Duffy, CSW | 1023597606 | Case Manager/Care Coordinator | Baton Rouge, LA | 2018 |
| Megan Duffy | 1033938212 | Nurse Practitioner | Milan, MO | 2024 |
| Megan Duffy | 1053144774 | Speech-Language Pathologist | Annandale, VA | 2024 |
| Megan Duffy, CNMW | 1154389823 | Advanced Practice Midwife | Philadelphia, PA | 2006 |
| Megan Duffy | 1154712115 | Mental Health Counselor | San Jose, CA | 2015 |
| Megan Duffy | 1174270300 | Professional Counselor | Morrison, CO | 2022 |
| Megan Duffy | 1215573092 | Occupational Therapist | Sewickley, PA | 2019 |
| Megan Duffy | 1285136531 | Hearing Instrument Specialist | Farmville, VA | 2018 |
| Megan Duffy, ED.S. | 1538353842 | Marriage & Family Therapist | Verona, NJ | 2007 |
| Megan Duffy, R.N. | 1538495049 | Registered Nurse | Bend, OR | 2009 |
| Megan Duffy | 1700032414 | Speech-Language Pathologist | Keene, NH | 2008 |
| Megan Duffy, PHARMD | 1902784192 | Pharmacist | Gainesville, FL | 2025 |
| Megan Duffy, CRNP | 1922540459 | Pediatric Nurse Practitioner | Philadelphia, PA | 2016 |
| Megan Duffy, PA-C | 1952975799 | Physician Assistant | San Pedro, CA | 2021 |
| Meghan Duffy, M.A. | 1003252511 | Speech-Language Pathologist | Brooklyn, NY | 2013 |
| Meghan Duffy, RN | 1285475046 | Critical Care Medicine Registered Nurse | New York, NY | 2024 |
| Meghan Duffy, DPT | 1437603537 | Pediatric Physical Therapist | Savannah, GA | 2016 |
| Meghan Duffy, OTR/L | 1700057627 | Occupational Therapist | Chicago, IL | 2008 |
| Meghan Duffy, MSED | 1700148012 | Specialist | New York, NY | 2012 |
| Meghan Duffy | 1912575804 | Social Worker | Joliet, IL | 2021 |
| Melinda Duffy, PHARMD | 1326673732 | Pharmacist | Sheboygan Falls, WI | 2020 |
| Melissa Duffy | 1265735310 | Speech-Language Pathologist | Charleston, WV | 2010 |
| Melissa Duffy, NP | 1457503013 | Pediatric Nurse Practitioner | Huntington, NY | 2008 |
| Melissa Duffy, PA-C | 1528369584 | Physician Assistant | Chicago, IL | 2010 |
| Melissa Duffy, LMT | 1639792161 | Massage Therapist | Maywood, NJ | 2020 |
| Mellisa Duffy, MSW | 1720542079 | Clinical Social Worker | Tacoma, WA | 2019 |
| Meredith Duffy, AU.D. | 1285914044 | Audiologist | Charleston, SC | 2011 |
| Meredith Duffy, MD | 1831300243 | Gynecologic Oncology Physician | Camden, NJ | 2007 |
| Mia Duffy | 1275429011 | Psychologist | Cincinnati, OH | 2025 |
| Michael Duffy | 1073241675 | Registered Dietitian | Phoenix, AZ | 2022 |
| Michael Duffy, PHARMD | 1083109490 | Pharmacist | Cleveland, OH | 2018 |
| Michael Duffy, D.M.D | 1083922785 | Dentist | Wilmington, DE | 2010 |
| Michael Duffy, BS | 1194162123 | Addiction (Substance Use Disorder) Counselor | Red Bank, NJ | 2013 |
| Michael Duffy | 1194966911 | Behavior Analyst | San Diego, CA | 2009 |
| Michael Duffy, OTRL,CHT | 1215050869 | Occupational Therapist | Shallotte, NC | 2007 |
| Michael Duffy, MD | 1255335964 | Anesthesiology Physician | Syracuse, NY | 2005 |
| Michael Duffy | 1295404333 | School Psychologist | Washington, DC | 2021 |
| Michael Duffy, PT, DPT | 1326634114 | Physical Therapist | Eugene, OR | 2020 |
| Michael Duffy, D.C. | 1346283272 | Chiropractor | Charlotte, NC | 2006 |
| Michael Duffy, ED.D., L.L.P. | 1356367049 | Clinical Psychologist | Fort Gratiot, MI | 2006 |
| Michael Duffy, MD | 1497878060 | Orthopaedic Surgery of the Spine Physician | Mansfield, TX | 2007 |
| Michael Duffy, DO | 1619380920 | Family Medicine Physician | Aliquippa, PA | 2014 |
| Michael Duffy, O.D. | 1639138670 | Optometrist | Eureka, KS | 2006 |
| Michael Duffy, M.D. | 1689635328 | Specialist | Beverly Hills, CA | 2006 |
| Michael Duffy, M.D. | 1700848041 | Specialist | Jacksonville, FL | 2006 |
| Michael Duffy, PT | 1790146033 | Physical Therapist | Fairlawn, OH | 2016 |
| Michael Duffy, MD | 1790742898 | Family Medicine Physician | Twin Falls, ID | 2006 |
| Michael Duffy, PA | 1801839188 | Physician Assistant | Oakland, CA | 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).