Providers Candace Obrien, LMSW to Marlene Obrien
300 individual NPIs in the federal registry, part 16,077 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. 81 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| Candace Obrien, LMSW | 1295201689 | Case Manager/Care Coordinator | Baton Rouge, LA | 2018 |
| Cara Obrien, MD | 1326224908 | Hospitalist Physician | Winston Salem, NC | 2008 |
| Carina Obrien | 1508421546 | Pharmacist | Pinole, CA | 2019 |
| Carleigh Obrien, LCSW | 1073035069 | Clinical Social Worker | Missoula, MT | 2017 |
| Carly Obrien, PHARMD | 1164113825 | Pharmacist | Iola, KS | 2023 |
| Carly Obrien, LCSW | 1508455031 | Clinical Social Worker | York, PA | 2021 |
| Carol Obrien, MSW LICSW | 1003852229 | Social Worker | Buffalo, MN | 2006 |
| Carol Obrien, PH.D. | 1619081841 | Clinical Psychologist | Largo, FL | 2006 |
| Casey Obrien, MA | 1063546943 | Counselor | Taunton, MA | 2007 |
| Casey Obrien | 1528862331 | Student in an Organized Health Care Education/Training Program | Lebanon, NH | 2025 |
| Casey Obrien, LCSW | 1992687628 | Clinical Social Worker | Coconut Creek, FL | 2025 |
| Catherine Obrien, PA | 1124836671 | Physician Assistant | Virginia Beach, VA | 2024 |
| Catherine Obrien, CMT | 1366740334 | Massage Therapist | Lawrence, KS | 2011 |
| Catherine Obrien, MA | 1497030415 | Marriage & Family Therapist | Newport Beach, CA | 2011 |
| Catherine Obrien, MA, LAC | 1659137727 | Professional Counselor | Paramus, NJ | 2024 |
| Charles Obrien, MD | 1053357137 | Emergency Medicine Physician | Huntington Beach, CA | 2006 |
| Charles Obrien, MD | 1124050182 | Pediatrics Physician | Deerfield, IL | 2006 |
| Charles Obrien, MD | 1275565582 | Neurology Physician | Philadelphia, PA | 2006 |
| Cheryl Obrien, MSW, LSW | 1821589235 | Mental Health Counselor | Lakewood, NJ | 2018 |
| Christine Obrien, LMT | 1215232657 | Massage Therapist | Espanola, NM | 2011 |
| Christine Obrien, DMD | 1255385860 | Dentist | West Warwick, RI | 2006 |
| Christine Obrien, L.C.P.C. | 1619300936 | Professional Counselor | Orland Park, IL | 2013 |
| Christine Obrien | 1881902195 | Addiction (Substance Use Disorder) Counselor | Glens Falls, NY | 2010 |
| Christopher Obrien, DPT | 1033412945 | Physical Therapist | Somerville, MA | 2010 |
| Christopher Obrien | 1083341317 | Chiropractor | Woodstock, GA | 2022 |
| Christopher Obrien | 1255181673 | Case Manager/Care Coordinator | Santa Rosa, CA | 2024 |
| Christopher Obrien | 1467115907 | Hearing Instrument Specialist | Mesa, AZ | 2021 |
| Cindy Obrien, APNP, NP-C | 1144669136 | Adult Health Nurse Practitioner | Wauwatosa, WI | 2013 |
| Claire Obrien | 1780420026 | Mental Health Counselor | Honokaa, HI | 2024 |
| Clare Obrien, MA LPC | 1487848271 | Professional Counselor | Gettysburg, PA | 2007 |
| Cody Obrien, PSC | 1770300204 | Peer Specialist | Yakima, WA | 2024 |
| Colleen Obrien, RDN, CDN | 1487162533 | Registered Dietitian | Rochester, NY | 2018 |
| Colleen Obrien, LCSW | 1902265812 | Clinical Social Worker | Saint Louis, MO | 2016 |
| Colleen Obrien | 1962244293 | Physical Therapy Assistant | Norton, MA | 2024 |
| Colleen Obrien, RN | 1972634574 | Registered Nurse | Ann Arbor, MI | 2007 |
| Concepcion Obrien, RN | 1558213025 | Case Management Registered Nurse | Sacramento, CA | 2026 |
| Conor Obrien, BCBA | 1235746116 | Behavior Analyst | Chattanooga, TN | 2020 |
| Corie Obrien, BA, COTA | 1750652970 | Occupational Therapist | Union City, NJ | 2012 |
| Craig Obrien, CRNA | 1023621927 | Registered Nurse | Lansing, MI | 2020 |
| Craig Obrien, MFT | 1720752397 | Marriage & Family Therapist | Stony Brook, NY | 2021 |
| Cynthia Obrien | 1154049120 | Personal Care Attendant | South Charleston, WV | 2022 |
| Cynthia Obrien, CRNP | 1912075359 | Nurse Practitioner | Largo, MD | 2006 |
| Dale Obrien, MD | 1326051954 | Family Medicine Physician | Pacific Grove, CA | 2006 |
| Dan Obrien, MSW | 1821289307 | Counselor | Rio Rancho, NM | 2007 |
| Daniel Obrien, D.O. | 1134578479 | Internal Medicine Physician | Peoria, IL | 2016 |
| Daniel Obrien, PA | 1255434155 | Medical Physician Assistant | Detroit, MI | 2006 |
| Daniel Obrien, DDS | 1255465985 | Dentist | Beavercreek, OH | 2007 |
| Daniel Obrien, MPA | 1447217054 | Physician Assistant | Manchester, NH | 2006 |
| Danielle Obrien, FNP-C | 1619800851 | Family Nurse Practitioner | Loveland, CO | 2026 |
| Danielle Obrien | 1639802697 | Specialist | Oceanside, NY | 2022 |
| Danna Obrien | 1912336256 | Rehabilitation Practitioner | Pahrump, NV | 2013 |
| Darin Obrien, CRNA | 1174667653 | Certified Registered Nurse Anesthetist | Boise, ID | 2007 |
| David Obrien | 1134772338 | Occupational Therapy Assistant | Oswego, NY | 2019 |
| David Obrien, OD | 1891977393 | Optometrist | Charleston, MS | 2007 |
| David Obrien, CRNA, ARNP | 1902035702 | Certified Registered Nurse Anesthetist | Fort Myers, FL | 2009 |
| Dawn Obrien, PA-C | 1316430978 | Physician Assistant | Savannah, GA | 2018 |
| Dawn Obrien, RPH | 1871875161 | Pharmacist | Neenah, WI | 2011 |
| Dawne Obrien, RN | 1477505170 | Registered Nurse | Cranston, RI | 2006 |
| Deborah Obrien, LSW | 1477738607 | Clinical Social Worker | Wooster, OH | 2008 |
| Deborah Obrien, RN,BSN | 1588874895 | Community Health Registered Nurse | Fort Collins, CO | 2007 |
| Deborah Obrien | 1912286303 | Addiction (Substance Use Disorder) Counselor | Tulsa, OK | 2011 |
| Debra Obrien, MD | 1780755447 | Pediatrics Physician | Shrewsbury, NJ | 2006 |
| Delaney Obrien | 1114878865 | Behavior Technician | Rockville, MD | 2026 |
| Denise Obrien, LMFT | 1003289414 | Marriage & Family Therapist | Guilford, VT | 2015 |
| Denise Obrien, RPH | 1689774705 | Pharmacist | Seattle, WA | 2006 |
| Dennis Obrien, RPH | 1609174911 | Pharmacist | Shippensburg, PA | 2011 |
| Dennis Obrien, DDS | 1760602791 | Dentist | Waukesha, WI | 2007 |
| Dennis Obrien, MD | 1811981699 | Neurology Physician | Billings, MT | 2005 |
| Dermot Obrien, M.D. | 1881648806 | Family Medicine Physician | Saginaw, MI | 2006 |
| Diana Obrien, PT MPT | 1720161243 | Physical Therapist | Jackson, WY | 2006 |
| Diane Obrien, MSW, LCSW | 1922438647 | Clinical Social Worker | Saint Louis, MO | 2013 |
| Dominika Obrien, APRN, FNP-BC | 1861071797 | Nurse Practitioner | Marlton, NJ | 2021 |
| Donald Obrien | 1538764717 | Community Health Worker | Sunland Park, NM | 2020 |
| Donna Obrien | 1083803803 | Registered Nurse | Baltimore, MD | 2007 |
| Donna Obrien, MSN | 1265405740 | Family Nurse Practitioner | Newport, RI | 2006 |
| Dora Obrien | 1326873076 | Behavior Technician | Monrovia, CA | 2024 |
| Dorothy Obrien | 1952001034 | Case Manager/Care Coordinator | Goshen, NY | 2023 |
| Douglas Obrien | 1235158239 | Physician Assistant | Greenbrae, CA | 2006 |
| Edward Obrien, MD | 1053379420 | Internal Medicine Physician | West Seneca, NY | 2006 |
| Edward Obrien | 1417738238 | Mental Health Counselor | Kingston, MA | 2023 |
| Edward Obrien, MD | 1891716254 | Critical Care Medicine (Anesthesiology) Physician | San Diego, CA | 2006 |
| Edward Obrien, LICSW | 1902195290 | Clinical Social Worker | Taunton, MA | 2011 |
| Edyle Obrien, LCSW | 1356534002 | Social Worker | East Hampton, NY | 2007 |
| Eileen Obrien | 1861970659 | Case Manager/Care Coordinator | Rochester, NY | 2018 |
| Elisha Obrien, CPC, AAC | 1619680477 | Case Manager/Care Coordinator | Spokane, WA | 2022 |
| Elizabeth Obrien, LMHC | 1003439092 | Mental Health Counselor | Arlington, MA | 2020 |
| Elizabeth Obrien, PTA | 1184688699 | Physical Therapy Assistant | Indianapolis, IN | 2006 |
| Elizabeth Obrien, LCSW | 1740716760 | Social Worker | Aquebogue, NY | 2017 |
| Elizabeth Obrien, M.D. | 1881650570 | Internal Medicine Physician | Carlinville, IL | 2006 |
| Elizabeth Obrien, MD | 1922454560 | Emergency Medicine Physician | Weymouth, MA | 2016 |
| Elizabeth Obrien | 1942955141 | Counselor | Elk Grove Village, IL | 2022 |
| Elle Obrien | 1174485460 | Behavior Technician | El Segundo, CA | 2025 |
| Ellen Obrien, LMT, CLC | 1417267675 | Lactation Consultant (Registered Nurse) | North Liberty, IA | 2010 |
| Ellen Obrien, M.A., MFT | 1427189430 | Marriage & Family Therapist | Lancaster, CA | 2007 |
| Ellen Obrien, MD | 1508321209 | Orthopaedic Surgery Physician | Janesville, WI | 2019 |
| Ellen Obrien, ANP | 1952465726 | Family Nurse Practitioner | Seward, AK | 2006 |
| Eloise Obrien, PH.D. | 1326240474 | Clinical Psychologist | Amherst, NY | 2007 |
| Emily Obrien | 1154265411 | Student in an Organized Health Care Education/Training Program | Baton Rouge, LA | 2026 |
| Emily Obrien, M.S., CCC-SLP | 1245490580 | Speech-Language Pathologist | Newton, MA | 2008 |
| Emma Obrien | 1245779248 | Counselor | Portsmouth, NH | 2017 |
| Erin Obrien | 1245678218 | Mental Health Counselor | Lawrence, MA | 2013 |
| Erin Obrien, OTD, OTR, OT/L | 1326910811 | Occupational Therapist | Sudbury, MA | 2025 |
| Erin Obrien, MSW | 1851501241 | Clinical Social Worker | Stockbridge, MA | 2007 |
| Ewa Obrien, DDS | 1699942367 | Dentist | Wallington, NJ | 2008 |
| Francis Obrien, MD | 1336148717 | Cardiovascular Disease Physician | New York, NY | 2005 |
| Frank Obrien, MD | 1215924162 | Orthopaedic Surgery Physician | Kingston, PA | 2005 |
| Frederick Obrien, M.D. | 1629129192 | Orthopaedic Surgery Physician | Fort Gordon, GA | 2007 |
| Gail Obrien, P.T. | 1346241577 | Physical Therapist | Bennington, VT | 2005 |
| Gary Obrien, LMHC CDP RN | 1316021835 | Mental Health Counselor | Puyallup, WA | 2006 |
| Grace Obrien, CRNA | 1295893246 | Certified Registered Nurse Anesthetist | Albany, NY | 2006 |
| Grant Obrien, M.D. | 1780374710 | Family Medicine Physician | Pittsburgh, PA | 2023 |
| Gregory Obrien | 1114793627 | Mental Health Counselor | Frankfort, IL | 2023 |
| Gregory Obrien | 1528798063 | Physical Therapy Assistant | Portland, OR | 2022 |
| Gregory Obrien, PT | 1679930234 | Physical Therapist | Wall Township, NJ | 2016 |
| Hailey Obrien | 1457018137 | Clinical Social Worker | Leonardtown, MD | 2021 |
| Hannah Obrien | 1073315255 | Student in an Organized Health Care Education/Training Program | Denver, CO | 2025 |
| Harriet Obrien, RN | 1831279140 | Registered Nurse | San Diego, CA | 2006 |
| Heather Obrien, RBT | 1043997828 | Behavior Technician | Fort Mill, SC | 2023 |
| Heather Obrien, LMT | 1134750946 | Massage Therapist | Spring Hill, FL | 2020 |
| Heather Obrien, CRNP | 1265900732 | Family Nurse Practitioner | York, PA | 2018 |
| Heather Obrien, COTA/L | 1922345818 | Occupational Therapy Assistant | West Brookfield, MA | 2013 |
| Heidi Obrien | 1235888900 | Case Manager/Care Coordinator | Bay Shore, NY | 2022 |
| Heidi Obrien | 1457025041 | Licensed Practical Nurse | Waverly, OH | 2021 |
| Henry Obrien, ED.S. | 1760716781 | School Psychologist | Lakeland, FL | 2009 |
| Isabel Obrien, MD, MPH | 1386387488 | Hospice and Palliative Medicine (Emergency Medicine) Physician | San Francisco, CA | 2022 |
| Isabella Obrien | 1407557333 | Personal Care Attendant | South Charleston, WV | 2023 |
| Jacob Obrien | 1184560872 | Behavior Technician | Marlborough, MA | 2026 |
| Jaela Obrien, DC | 1386572303 | Chiropractor | Maple Grove, MN | 2026 |
| Jake Obrien, D.D.S. | 1932557501 | Dentist | Shreveport, LA | 2016 |
| James Obrien, M.D. | 1144244161 | Pulmonary Disease Physician | Denver, CO | 2006 |
| James Obrien, M.D. | 1326233511 | Cardiovascular Disease Physician | Norwich, NY | 2007 |
| James Obrien, PRS | 1356064927 | Peer Specialist | Cleveland, OH | 2022 |
| James Obrien | 1609697762 | Case Manager/Care Coordinator | Lyons, NY | 2024 |
| James Obrien, M.D. | 1740284553 | Family Medicine Physician | Louisville, KY | 2005 |
| James Obrien, MD | 1750494175 | Family Medicine Physician | Bakersfield, CA | 2006 |
| James Obrien, CRNA MSN | 1811071335 | Certified Registered Nurse Anesthetist | Newport News, VA | 2006 |
| James Obrien, PT, DPT | 1942816921 | Physical Therapist | Chicago, IL | 2020 |
| James Obrien, D.D.S. | 1952546517 | Dentist | Bremerton, WA | 2008 |
| Jamie Obrien, LMSW | 1619364148 | Social Worker | Baton Rouge, LA | 2015 |
| Jamie Obrien | 1760244487 | Homemaker | Chagrin Falls, OH | 2024 |
| Jane Obrien, LCDC | 1134741341 | Addiction (Substance Use Disorder) Counselor | McKinney, TX | 2020 |
| Janet Obrien, P.T. | 1093938565 | Physical Therapist | Sarasota, FL | 2007 |
| Janet Obrien | 1114202033 | Counselor | Lawton, OK | 2011 |
| Janet Obrien, M.D. | 1467702399 | Internal Medicine Physician | Sacramento, CA | 2012 |
| Janis Obrien | 1437883543 | Behavior Technician | Colorado Springs, CO | 2022 |
| Jean Obrien, LCSW | 1265604854 | Clinical Social Worker | San Jose, CA | 2008 |
| Jean Obrien | 1376728311 | Occupational Therapist | Kennebunk, ME | 2008 |
| Jean Obrien, MD | 1902884075 | Diagnostic Radiology Physician | Beverly, MA | 2006 |
| Jeana Obrien, M.D. | 1942261896 | Pulmonary Disease Physician | Temple, TX | 2006 |
| Jeanne Obrien, RN | 1609299965 | Registered Nurse | Milwaukee, WI | 2014 |
| Jeff Obrien | 1336082452 | Homemaker | Amherst, OH | 2026 |
| Jeffrey Obrien | 1093501512 | Student in an Organized Health Care Education/Training Program | Boston, MA | 2025 |
| Jeffrey Obrien, DDS | 1225258254 | Dentist | Waukesha, WI | 2007 |
| Jeffrey Obrien, MD | 1487627758 | Orthopaedic Surgery Physician | Merritt Island, FL | 2006 |
| Jeffrey Obrien | 1508317330 | Family Nurse Practitioner | Auburn, NY | 2016 |
| Jennifer Obrien, RDH | 1124184643 | Dental Hygienist | Poughkeepsie, NY | 2006 |
| Jennifer Obrien | 1164310272 | Home Health Aide | Spencer, WV | 2025 |
| Jennifer Obrien, FNP-BC | 1184426033 | Family Nurse Practitioner | Morristown, NJ | 2025 |
| Jennifer Obrien, PH.D. | 1326607680 | Psychologist | Cambridge, MA | 2019 |
| Jennifer Obrien, LCSW | 1386364388 | Clinical Social Worker | Sugar Land, TX | 2022 |
| Jennifer Obrien | 1518785930 | Psychiatric/Mental Health Nurse Practitioner | Melrose, MA | 2024 |
| Jennifer Obrien | 1548046501 | School Registered Nurse | Wilmington, DE | 2023 |
| Jennifer Obrien, CNP | 1548243686 | Adult Health Nurse Practitioner | Columbus, OH | 2005 |
| Jennifer Obrien, MD | 1609876275 | Pediatrics Physician | Horsham, PA | 2005 |
| Jessica Obrien, LCDC III | 1235674763 | Addiction (Substance Use Disorder) Counselor | Whitehall, OH | 2016 |
| Jessica Obrien, CPNP | 1578035481 | Pediatric Nurse Practitioner | Rutherford, NJ | 2018 |
| Jessica Obrien | 1700491057 | Case Manager/Care Coordinator | Edgerton, WY | 2020 |
| Jessica Obrien | 1972481372 | Day Training/Habilitation Specialist | Petaluma, CA | 2025 |
| Jill Obrien, ANP-BC | 1295908259 | Adult Health Nurse Practitioner | Dixon, IL | 2008 |
| Jill Obrien, PHARMD | 1376826867 | Pharmacist | Gary, IN | 2011 |
| Jill Obrien, LAC, D.O.M. | 1891984308 | Acupuncturist | Peoria, AZ | 2007 |
| Jodie Obrien, LCSW | 1063283885 | Clinical Social Worker | Woodbury, NJ | 2024 |
| John Obrien, ED D | 1043314370 | Psychologist | Plymouth, MA | 2006 |
| John Obrien, CT | 1164055992 | Counselor | Gallipolis, OH | 2020 |
| John Obrien, MD | 1255445862 | Plastic Surgery Within the Head and Neck (Plastic Surgery) Physician | St Petersburg, FL | 2006 |
| John Obrien, PHARMACIST | 1376867192 | Pharmacist | Langhorne, PA | 2010 |
| John Obrien, PMHNP-BC | 1417710260 | Psychiatric/Mental Health Nurse Practitioner | Brooklyn, NY | 2024 |
| John Obrien, MD | 1467527655 | Family Medicine Physician | Liverpool, NY | 2006 |
| John Obrien, RVT | 1518074459 | Vascular Specialist/Technologist Cardiovascular | Bellingham, WA | 2006 |
| John Obrien, RPH | 1700150349 | Pharmacist | Hackettstown, NJ | 2012 |
| John Obrien, DC | 1801984877 | Chiropractor | Troy, NY | 2006 |
| John Obrien, M.D. | 1811980188 | Specialist | Atlanta, GA | 2005 |
| John Obrien, RN | 1902476005 | Administrator Registered Nurse | Passaic, NJ | 2021 |
| Jonathan Obrien, PA-C | 1639880644 | Physician Assistant | Phoenix, AZ | 2022 |
| Jose Obrien, COTA/L | 1700376761 | Occupational Therapy Assistant | Lincolnwood, IL | 2018 |
| Joselle Obrien, MD | 1437713658 | Student in an Organized Health Care Education/Training Program | Brooklyn, NY | 2019 |
| Joseph Obrien | 1396475760 | Developmental Therapist | Springfield, MA | 2022 |
| Josette Obrien, LMT | 1073202453 | Massage Therapist | East Meadow, NY | 2023 |
| Julia Obrien, DPT | 1053913996 | Physical Therapist | Louisville, CO | 2020 |
| Julianne Obrien | 1396355624 | Behavior Technician | Ashburn, VA | 2020 |
| Julie Obrien | 1154272003 | Occupational Therapist | Alexandria, MN | 2026 |
| Julie Obrien | 1477393551 | Mental Health Counselor | New Castle, PA | 2024 |
| Julie Obrien, OTA | 1508024084 | Occupational Therapy Assistant | Watertown, NY | 2008 |
| Julie Obrien, APRN | 1669551131 | Acute Care Nurse Practitioner | Salt Lake City, UT | 2006 |
| Julie Obrien, MED, LMHC | 1982732293 | Mental Health Counselor | Lexington, MA | 2007 |
| June Obrien, CDP | 1700020534 | Addiction (Substance Use Disorder) Counselor | Shelton, WA | 2009 |
| Justine Obrien | 1740830652 | Counselor | Oneida, NY | 2019 |
| Kaleigh Obrien | 1750194957 | Behavior Technician | Basehor, KS | 2025 |
| Kaley Obrien, RDH | 1700391505 | Dental Hygienist | Inchelium, WA | 2017 |
| Karen Obrien | 1356844211 | School Registered Nurse | North Charleston, SC | 2018 |
| Karen Obrien, MD | 1508870957 | Hospice and Palliative Medicine (Internal Medicine) Physician | Boston, MA | 2006 |
| Karrie Obrien | 1699643833 | Massage Therapist | Mission Viejo, CA | 2025 |
| Kate Obrien | 1508423575 | Physical Therapy Assistant | Philadelphia, PA | 2019 |
| Kate Obrien, RN | 1881824746 | Community Health Registered Nurse | Cortez, CO | 2009 |
| Katelyn Obrien | 1932795002 | Pediatrics Physician | Dalton, GA | 2020 |
| Katelynn Obrien | 1487293031 | Physician Assistant | Philadelphia, PA | 2019 |
| Katherine Obrien, MD | 1033159124 | Obstetrics & Gynecology Physician | Paramus, NJ | 2006 |
| Katherine Obrien, LMHC | 1255780151 | Mental Health Counselor | Boston, MA | 2016 |
| Katherine Obrien, RD | 1639044795 | Registered Dietitian | Tolland, CT | 2025 |
| Katherine Obrien, LCPC | 1639236169 | Addiction (Substance Use Disorder) Counselor | Blue Island, IL | 2007 |
| Katherine Obrien, CF-SLP | 1699254334 | Speech-Language Pathologist | Vienna, VA | 2018 |
| Katherine Obrien, OTR/L | 1891098844 | Occupational Therapist | Cedarburg, WI | 2010 |
| Kathleen Obrien | 1255025979 | Behavior Technician | Sacramento, CA | 2023 |
| Kathleen Obrien, MS RN NP CS | 1346341625 | Psychiatric/Mental Health Nurse Practitioner | Penn Yan, NY | 2006 |
| Kathleen Obrien, MD | 1427236975 | Emergency Medicine Physician | Reno, NV | 2008 |
| Kathleen Obrien, LPC | 1710400023 | Counselor | Round Rock, TX | 2017 |
| Kathleen Obrien, FNP | 1760268031 | Geriatric Medicine (Family Medicine) Physician | Manhasset, NY | 2023 |
| Kathleen Obrien, RN BSN | 1821120635 | School Registered Nurse | Tucson, AZ | 2007 |
| Kathleen Obrien, LMSW; CASACT | 1861801227 | Mental Health Counselor | New Windsor, NY | 2014 |
| Kathryn Obrien, MA, LCAT | 1265649917 | Art Therapist | New York, NY | 2007 |
| Kathryn Obrien, MD | 1407599269 | Family Medicine Physician | Merriam, KS | 2022 |
| Kathy Obrien, PA-C | 1073846606 | Physician Assistant | Norwalk, CT | 2009 |
| Katie Obrien, RN | 1972440485 | Emergency Registered Nurse | Santa Rosa, CA | 2026 |
| Kayla Obrien | 1275491342 | Behavior Analyst | Cincinnati, OH | 2026 |
| Kayla Obrien | 1518815380 | Behavior Technician | Arvada, CO | 2026 |
| Kelli Obrien, CNS CANDIDATE | 1063274124 | Nutritionist | Wilmington, DE | 2024 |
| Kellie Obrien | 1801710587 | Registered Nurse | Richfield, MN | 2026 |
| Kelly Obrien, P.A.C. | 1013226828 | Medical Physician Assistant | Aurora, CO | 2010 |
| Kelly Obrien | 1023513884 | Speech-Language Pathologist | Virginia Beach, VA | 2018 |
| Kelly Obrien | 1053084277 | Behavior Analyst | Costa Mesa, CA | 2021 |
| Kelly Obrien, DMD | 1154497873 | Dentist | Salt Lake City, UT | 2006 |
| Kelly Obrien, RD, NC | 1194042721 | General Practice Physician | Seattle, WA | 2010 |
| Kelly Obrien, LCSW, MCAP | 1407129703 | Clinical Social Worker | Navarre, FL | 2012 |
| Kelly Obrien, ACNP | 1629701776 | Acute Care Nurse Practitioner | Albuquerque, NM | 2022 |
| Ken Obrien | 1336800267 | Behavior Analyst | Costa Mesa, CA | 2022 |
| Kent Obrien, M.D. | 1427087006 | Emergency Medicine Physician | Maryville, TN | 2006 |
| Kerri Obrien | 1891455630 | Behavior Technician | Liberty, MO | 2021 |
| Kevin Obrien, MD | 1235157678 | Diagnostic Radiology Physician | Warren, MI | 2006 |
| Kevin Obrien, LCSW | 1275916645 | Clinical Social Worker | South River, NJ | 2015 |
| Kevin Obrien, LCSW | 1306962923 | Addiction (Substance Use Disorder) Counselor | Denver, CO | 2007 |
| Kevin Obrien, LCSW | 1316226863 | Clinical Social Worker | Santa Fe, NM | 2011 |
| Kevin Obrien, M.D. | 1477543536 | Ophthalmology Physician | Fall River, MA | 2005 |
| Kevin Obrien, MD | 1780610717 | Family Medicine Physician | Norman, OK | 2006 |
| Kevin Obrien, PA | 1801810676 | Surgical Physician Assistant | Indianapolis, IN | 2006 |
| Kevin Obrien, MD | 1992761019 | Plastic Surgery Physician | Birmingham, AL | 2006 |
| Kimberly Obrien, PA-C | 1164551289 | Surgical Physician Assistant | Tarboro, NC | 2007 |
| Kimberly Obrien, PHD, LICSW | 1275694309 | Clinical Social Worker | Walpole, MA | 2006 |
| Kimberly Obrien | 1912542390 | Peer Specialist | Cleveland, OH | 2019 |
| Kirby Obrien | 1679223184 | Homemaker | Dayton, OH | 2022 |
| Kirstie Obrien, CRNA | 1922007814 | Certified Registered Nurse Anesthetist | Slidell, LA | 2005 |
| Kristen Obrien, RD, LDN, CLC | 1497327399 | Registered Dietitian | Amherst, MA | 2021 |
| Kristen Obrien, M.D. | 1811922529 | Family Medicine Physician | Smithtown, NY | 2006 |
| Kristin Obrien | 1134507296 | Behavior Technician | Lunenburg, MA | 2015 |
| Kristin Obrien | 1144977208 | School Registered Nurse | Harahan, LA | 2022 |
| Kristin Obrien | 1386038230 | Specialist | Encinitas, CA | 2015 |
| Kristin Obrien | 1477078103 | Family Nurse Practitioner | Newport, RI | 2017 |
| Kristin Obrien, LCSW | 1629588678 | Clinical Social Worker | Westport, CT | 2017 |
| Kristine Obrien | 1003767856 | Behavior Technician | Humble, TX | 2026 |
| Kurt Obrien, MD | 1649272063 | Surgery Physician | New Iberia, LA | 2005 |
| Laura Obrien, OTR/L | 1093094450 | Pediatric Occupational Therapist | Park Ridge, IL | 2011 |
| Laura Obrien, LCSW-R | 1407283567 | Clinical Social Worker | New City, NY | 2013 |
| Lauren Obrien, MD | 1043447642 | Family Medicine Physician | Washington, PA | 2009 |
| Lauren Obrien, CRNA | 1124909668 | Certified Registered Nurse Anesthetist | Corpus Christi, TX | 2025 |
| Laurene Obrien, NP, PSYCH,MH | 1891795225 | Psychiatric/Mental Health Nurse Practitioner | Clifton Park, NY | 2005 |
| Lee Anne Obrien, MD | 1922093574 | Pediatrics Physician | Brentwood, TN | 2005 |
| Liam Obrien, CRNA | 1861326282 | Certified Registered Nurse Anesthetist | Bridgeport, CT | 2026 |
| Lily Obrien | 1952860082 | Behavior Technician | Concord, CA | 2019 |
| Lina Obrien, M.D. | 1982608386 | Colon & Rectal Surgery Physician | Overland Park, KS | 2005 |
| Lindsay Obrien | 1174096762 | Certified Registered Nurse Anesthetist | Philadelphia, PA | 2019 |
| Lindsay Obrien, RD, LD | 1477978211 | Registered Dietitian | Parkersburg, WV | 2014 |
| Lindsay Obrien, LCSW | 1982119814 | Clinical Social Worker | El Paso, TX | 2017 |
| Lindsey Obrien | 1710742689 | Certified Registered Nurse Anesthetist | Bristol, CT | 2024 |
| Lisa Obrien, APNP | 1174980098 | Family Nurse Practitioner | Franklin, WI | 2016 |
| Lisa Obrien | 1184300212 | Behavior Technician | Austin, TX | 2023 |
| Lisa Obrien, MS, LPC | 1215214978 | Professional Counselor | Portland, OR | 2011 |
| Lisa Obrien, PHARMACIST | 1538437843 | Pharmacist | Maplewood, MN | 2011 |
| Lisa Obrien | 1679035935 | Occupational Therapy Assistant | Daytona Beach, FL | 2019 |
| Lisa Obrien, RN | 1710842604 | Case Management Registered Nurse | Alvin, TX | 2025 |
| Lisbeth Obrien, PHARMD | 1164026241 | Pharmacist | Cranston, RI | 2020 |
| Loren Obrien | 1467247791 | Mental Health Counselor | Cherry Hill, NJ | 2025 |
| Loretta Obrien, MD | 1750379657 | Infectious Disease Physician | Livermore, CA | 2005 |
| Lori Obrien, R.N. | 1366409401 | Registered Nurse | Brookfield, WI | 2006 |
| Lynette Obrien, RN, OCN, BSN | 1164629960 | Registered Nurse | Cambridge, MA | 2007 |
| Lynn Obrien, NP | 1114996980 | Ambulatory Care Registered Nurse | San Francisco, CA | 2006 |
| Lynn Obrien, MD | 1164418000 | Family Medicine Physician | Fairfax, VA | 2005 |
| Lynn Obrien, MA/CCC-SLP | 1932985561 | Speech-Language Pathologist | Charles City, IA | 2023 |
| Mackenzie Obrien, LMHC-D | 1184190969 | Counselor | Albany, NY | 2018 |
| Mackenzie Obrien, NP | 1861123937 | Critical Care Pediatric Nurse Practitioner | Palo Alto, CA | 2022 |
| Madeline Obrien | 1811869878 | Behavior Technician | Concord, NC | 2025 |
| Maeghan Obrien, DO | 1992593271 | Student in an Organized Health Care Education/Training Program | Rochester, NY | 2025 |
| Mallory Obrien | 1821845769 | Physician Assistant | Savage, MN | 2024 |
| Margaret Obrien, LCPC | 1124205224 | Counselor | Wells, ME | 2008 |
| Margaret Obrien, CF-SLP | 1184407496 | Speech-Language Pathologist | O Fallon, MO | 2023 |
| Margaret Obrien | 1568850626 | Specialist | Huntington Station, NY | 2014 |
| Margaret Obrien | 1598223695 | Behavior Technician | Farmington Hills, MI | 2019 |
| Maria Obrien | 1245990860 | Behavior Analyst | West Springfield, MA | 2021 |
| Marianna Obrien | 1164131314 | Student in an Organized Health Care Education/Training Program | San Diego, CA | 2022 |
| Marianne Obrien, LICSW | 1407351943 | Clinical Social Worker | Wrentham, MA | 2018 |
| Mark Obrien, MD | 1841221348 | Internal Medicine Physician | Benton Harbor, MI | 2006 |
| Marlene Obrien | 1457234767 | Doula | Galloway, NJ | 2025 |
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).