Providers Dorothy Callahan to Katie Callahan, FNP
300 individual NPIs in the federal registry, part 3,167 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. 83 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| Dorothy Callahan | 1134636087 | Physical Therapy Assistant | Albany, NY | 2018 |
| Dorothy Callahan | 1932987625 | Case Manager/Care Coordinator | Oklahoma City, OK | 2023 |
| Douglas Callahan, MD | 1043312812 | Psychiatry Physician | Conway, AR | 2006 |
| Douglas Callahan, D.O. | 1265540355 | Family Medicine Physician | St George, UT | 2006 |
| Duane Callahan, DDS | 1770633190 | General Practice Dentistry | Sandy, UT | 2007 |
| Eddy Callahan, PH.D. | 1891244547 | Marriage & Family Therapist | San Diego, CA | 2016 |
| Edith Callahan | 1073166542 | Sports Medicine (Physical Medicine & Rehabilitation) Physician | Timonium, MD | 2019 |
| Edna Callahan | 1770677619 | Personal Care Attendant | Ellendale, MN | 2006 |
| Edward Callahan, MD | 1255828166 | General Practice Physician | Palm Bay, FL | 2018 |
| Edward Callahan | 1417323536 | Hearing Instrument Specialist | West Hartford, CT | 2015 |
| Edward Callahan, PH.D. | 1467438051 | Clinical Psychologist | Sacramento, CA | 2005 |
| Edward Callahan, PHARM.D | 1497974042 | Pharmacist | Carson, CA | 2007 |
| Edward Callahan, MD | 1770537029 | Emergency Medicine Physician | Milwaukee, WI | 2006 |
| Eileen Callahan, PH.D. | 1356331623 | Clinical Psychologist | Coronado, CA | 2005 |
| Eileen Callahan, MD | 1396711776 | Geriatric Medicine (Internal Medicine) Physician | New York, NY | 2006 |
| Elaina Callahan | 1811673346 | General Practice Dentistry | Romeoville, IL | 2023 |
| Elaine Callahan, MD | 1366498396 | Internal Medicine Physician | Roseburg, OR | 2006 |
| Elisabeth Callahan, LCSW | 1548453756 | Clinical Social Worker | Pleasant Hill, CA | 2007 |
| Elizabeth Callahan | 1104541861 | Marriage & Family Therapist | Bakersfield, CA | 2022 |
| Elizabeth Callahan, PA-C | 1124219233 | Physician Assistant | Burlington, MA | 2007 |
| Elizabeth Callahan, MD | 1275049512 | Behavior Technician | Vancouver, WA | 2017 |
| Elizabeth Callahan, BSW, CCM | 1386787760 | Case Manager/Care Coordinator | Boone, NC | 2007 |
| Elizabeth Callahan, DO | 1417585704 | Physical Medicine & Rehabilitation Physician | Naperville, IL | 2020 |
| Elizabeth Callahan, M.D., LLC | 1477548808 | Specialist | University Park, FL | 2005 |
| Elizabeth Callahan | 1528713351 | Behavior Analyst | Somerset, NJ | 2022 |
| Elizabeth Callahan, PA | 1578855565 | Physician Assistant | West Islip, NY | 2011 |
| Elizabeth Callahan, APRN | 1629748579 | Family Nurse Practitioner | Columbia, SC | 2021 |
| Elizabeth Callahan | 1659539864 | Mental Health Counselor | El Cajon, CA | 2008 |
| Elizabeth Callahan, OTR/L | 1720725757 | Pediatric Occupational Therapist | Rochester, NH | 2022 |
| Elizabeth Callahan, PHD | 1760756084 | Mental Health Counselor | Rocky Mount, VA | 2012 |
| Elizabeth Callahan, NURSE PRACTITIONER | 1841924271 | Nurse Practitioner | Princeton, NJ | 2022 |
| Ella Callahan | 1285233312 | Homemaker | Beckley, WV | 2020 |
| Elle Callahan, MSW | 1568116648 | Social Worker | East Lansing, MI | 2022 |
| Ellen Callahan, CPNP | 1184065443 | Pediatric Nurse Practitioner | Andover, MA | 2013 |
| Ellen Callahan, D.M.D. | 1790778462 | General Practice Dentistry | Oceanside, CA | 2005 |
| Elliott Callahan, MD | 1659804128 | Anesthesiology Physician | Oakland, CA | 2017 |
| Elvira Callahan, DPM | 1588647879 | Primary Podiatric Medicine Podiatrist | Forest Hills, NY | 2005 |
| Emily Callahan | 1255293973 | Behavior Technician | Danvers, MA | 2025 |
| Emily Callahan, M.S., CCC-SLP | 1356742514 | Speech-Language Pathologist | Mount Vernon, OH | 2014 |
| Emily Callahan, ARNP | 1619676558 | Psychiatric/Mental Health Nurse Practitioner | Seattle, WA | 2023 |
| Emily Callahan, AGACNP, RN | 1710348560 | Acute Care Nurse Practitioner | Bridgeport, CT | 2016 |
| Emily Callahan | 1730764903 | Clinical Social Worker | Saco, ME | 2021 |
| Emily Callahan, M.S. | 1760631659 | Student in an Organized Health Care Education/Training Program | Fall River, MA | 2008 |
| Emily Callahan, LCSW | 1770948143 | Clinical Social Worker | Rockledge, FL | 2015 |
| Emily Callahan | 1952928244 | Genetic Counselor (M.S.) | Sylvania, OH | 2020 |
| Emily Callahan | 1962959239 | Developmental Therapist | Milford, MA | 2016 |
| Emma Callahan, RDH | 1447932413 | Dental Hygienist | Warrensburg, NY | 2023 |
| Emma Callahan, MSN RN DNP | 1588359095 | Nurse Practitioner | Suwanee, GA | 2023 |
| Emma Callahan | 1669358735 | Physical Therapist | South Orange, NJ | 2025 |
| Eric Callahan, PT, DPT | 1487153086 | Physical Therapist | Waverly, IA | 2018 |
| Eric Callahan, ATC | 1891718458 | Athletic Trainer | Fort Wayne, IN | 2006 |
| Erica Callahan | 1427927847 | Developmental Therapist | Whitinsville, MA | 2025 |
| Erica Callahan, PA-C | 1487039129 | Medical Physician Assistant | Hartford, CT | 2015 |
| Erica Callahan, L.M.S.W. | 1649701061 | Social Worker | Hartford, CT | 2017 |
| Erica Callahan, D.C | 1679775290 | Chiropractor | Seneca Falls, NY | 2007 |
| Erica Callahan | 1821462649 | Nurse's Aide | Brookpark, OH | 2015 |
| Erica Callahan | 1912080300 | Certified Registered Nurse Anesthetist | Pittsburgh, PA | 2006 |
| Erika Callahan | 1134489404 | Home Health Aide | Washington, DC | 2012 |
| Erin Callahan | 1063956605 | Behavior Technician | Portage, MI | 2016 |
| Erin Callahan, DO | 1194585711 | Student in an Organized Health Care Education/Training Program | Burlington, VT | 2024 |
| Erin Callahan, ANP, RN | 1215131156 | Psychiatric/Mental Health Nurse Practitioner | Anchorage, AK | 2007 |
| Erin Callahan, ATC, ROT | 1417094053 | Athletic Trainer | San Francisco, CA | 2007 |
| Erin Callahan, CNM | 1437111945 | Advanced Practice Midwife | Westlake, OH | 2006 |
| Erin Callahan, OTR | 1497514822 | Occupational Therapist | Oyster Bay, NY | 2024 |
| Erin Callahan | 1649763228 | School Social Worker | Richmond, VA | 2018 |
| Erin Callahan, DC | 1659918043 | Chiropractor | Chesapeake, VA | 2019 |
| Erin Callahan, M.S., CF-SLP | 1740857713 | Speech-Language Pathologist | Woodbridge, VA | 2021 |
| Erin Callahan, LCSW-C | 1942877337 | Clinical Social Worker | Annapolis, MD | 2021 |
| Erin Callahan, PT | 1962764258 | Physical Therapist | Plainfield, IL | 2012 |
| Erin Callahan, LCPC | 1982542304 | Professional Counselor | Park Ridge, IL | 2026 |
| Ernest Callahan | 1649344912 | Other Technician | Miami Beach, FL | 2006 |
| Ethan Callahan, RBT | 1114869450 | Behavior Technician | Greenville, SC | 2026 |
| Eva Callahan | 1225518525 | Licensed Vocational Nurse | Canyon Lake, TX | 2018 |
| Evan Callahan, DPT | 1003614736 | Physical Therapist | Louisville, KY | 2025 |
| Evan Callahan, DO | 1184309122 | Internal Medicine Physician | Erie, PA | 2023 |
| Evyn Callahan | 1922725464 | Student in an Organized Health Care Education/Training Program | Storrs, CT | 2022 |
| Fahimah Callahan, RD | 1710145958 | Registered Dietitian | Lytle, TX | 2008 |
| Fallon Callahan | 1609358050 | Pharmacist | Madison, CT | 2018 |
| Faye Callahan | 1174279434 | Attendant Care Provider | Spearfish, SD | 2022 |
| Flinton Callahan, M.D. | 1063411817 | Ophthalmology Physician | Leesburg, VA | 2005 |
| Frances Callahan | 1407469620 | Clinical Social Worker | Lutherville Timonium, MD | 2020 |
| Gayle Callahan, PHD | 1538262191 | School Psychologist | Peoria, IL | 2006 |
| Gayle Callahan, RPH | 1780895391 | Pharmacist | Sarasota, FL | 2007 |
| Gemma Callahan | 1598691065 | Behavior Analyst | Warrenville, IL | 2026 |
| Genevieve Callahan, L.C.S.W. | 1962415497 | Clinical Social Worker | Palo Alto, CA | 2006 |
| Georgiana Callahan, LICSW | 1235895434 | Clinical Social Worker | Chelsea, MA | 2021 |
| Georgiana Callahan | 1851679245 | Addiction (Substance Use Disorder) Counselor | Salt Lake City, UT | 2011 |
| Gerald Callahan, SUDRC | 1972384402 | Case Manager/Care Coordinator | San Francisco, CA | 2023 |
| Geraldine Callahan, NP | 1669865473 | Nurse Practitioner | Nashua, NH | 2015 |
| Gina Callahan, RPA-C | 1063474070 | Physician Assistant | Endicott, NY | 2006 |
| Glenn Callahan, DPM | 1922195353 | Podiatrist | Yonkers, NY | 2006 |
| Grace Callahan | 1477443059 | Speech-Language Pathologist | Kansas City, MO | 2025 |
| Grace Callahan, MD | 1528760592 | Student in an Organized Health Care Education/Training Program | Boston, MA | 2023 |
| Grace Callahan | 1679435333 | Attendant Care Provider | Lincoln, NE | 2025 |
| Gregory Callahan, BOCO | 1497944946 | Other Technician | Baltimore, MD | 2007 |
| Gwen Callahan, LMT | 1033573340 | Massage Therapist | Portland, OR | 2016 |
| Gwen Callahan, PA C | 1487836961 | Physician Assistant | Warrenton, VA | 2007 |
| Gwendolyn Callahan | 1205095429 | Mental Health Counselor | Derry, NH | 2008 |
| Hailey Callahan | 1285352542 | Behavior Technician | Adrian, MI | 2022 |
| Hailey Callahan, RCP | 1407641566 | Certified Respiratory Therapist | Seattle, WA | 2025 |
| Hailey Callahan | 1750871737 | Behavior Technician | Roscoe, IL | 2018 |
| Haley Callahan, MSW, LCSW | 1134551427 | Clinical Social Worker | Kula, HI | 2013 |
| Haley Callahan | 1144172131 | Chore Provider | Omaha, NE | 2026 |
| Haley Callahan | 1154969632 | Physician Assistant | North Andover, MA | 2019 |
| Haley Callahan, MA, ALC, NCC | 1568130870 | Counselor | Huntsville, AL | 2021 |
| Hanly Callahan | 1689297194 | Professional Counselor | Austin, TX | 2020 |
| Hannah Callahan | 1174080345 | Technician/Technologist | Poplar Bluff, MO | 2019 |
| Hannah Callahan | 1497129555 | Case Manager/Care Coordinator | Dalton, GA | 2015 |
| Hannah Callahan, LPC | 1689471252 | Professional Counselor | Austin, TX | 2025 |
| Heather Callahan | 1447766431 | Clinical Social Worker | Queens Village, NY | 2017 |
| Heather Callahan | 1760378590 | Chore Provider | Scottsbluff, NE | 2025 |
| Heather Callahan, PA-C | 1770039927 | Medical Physician Assistant | Warrenton, VA | 2016 |
| Heather Callahan, RN | 1770415291 | Emergency Registered Nurse | Memphis, TN | 2026 |
| Heidi Callahan, ATC | 1063442614 | Athletic Trainer | Dallas, GA | 2006 |
| Heidi Callahan, PCW II | 1184974727 | Case Manager/Care Coordinator | Laughlin, NV | 2012 |
| Heidi Callahan, P.A. | 1699778811 | Physician Assistant | Salisbury, MD | 2005 |
| Helen Callahan, CRNP | 1215937883 | Nurse Practitioner | Tucson, AZ | 2005 |
| Hilary Callahan | 1265520068 | Physical Therapist | Tampa, FL | 2006 |
| Hope Callahan, LSW | 1225453863 | Social Worker | Cleveland, OH | 2014 |
| Ian Callahan, MFT | 1457444002 | Mental Health Counselor | Puyallup, WA | 2006 |
| Immanuel Callahan | 1376252536 | Intellectual & Developmental Disabilities Psychologist | Cleveland, OH | 2022 |
| Irina Callahan, R.N. | 1861863110 | Registered Nurse | Dorchester, MA | 2015 |
| Irma Callahan | 1811312440 | Acupuncturist | East Northport, NY | 2014 |
| Ivy Callahan, RBT | 1811568074 | Behavior Technician | Perham, MN | 2021 |
| Jack Callahan, OTR/L | 1417721044 | Occupational Therapist | Fort Wayne, IN | 2023 |
| Jack Callahan, LCPC | 1952100257 | Mental Health Counselor | Burr Ridge, IL | 2025 |
| Jaclyn Callahan, LCSW | 1033718804 | Clinical Social Worker | Caruthersville, MO | 2020 |
| Jaclyn Callahan, MA, LMHC | 1194995027 | Professional Counselor | Bellevue, WA | 2008 |
| Jaclyn Callahan, APRN | 1558793125 | Obstetrics & Gynecology Nurse Practitioner | Rogers, AR | 2013 |
| Jacob Callahan, MS, ATC, CES | 1215551551 | Athletic Trainer | San Diego, CA | 2020 |
| Jacob Callahan | 1811794191 | Case Manager/Care Coordinator | Seaside, OR | 2025 |
| Jacob Callahan, RN | 1821776071 | Psychiatric/Mental Health Nurse Practitioner | Wheat Ridge, CO | 2023 |
| Jacqueline Callahan | 1154068724 | Student in an Organized Health Care Education/Training Program | Newark, DE | 2022 |
| Jacquelyn Callahan, MD | 1396373213 | Emergency Medicine Physician | Corpus Christi, TX | 2020 |
| Jade Callahan, MSW | 1568935211 | Social Worker | Lanham, MD | 2019 |
| Jake Callahan, DPT, PT | 1528876208 | Physical Therapist | Dublin, VA | 2024 |
| James Callahan, MD | 1003873753 | Pediatric Emergency Medicine (Pediatrics) Physician | Philadelphia, PA | 2006 |
| James Callahan, D.M.D. | 1225072879 | General Practice Dentistry | Los Angeles, CA | 2006 |
| James Callahan, M.D. | 1245236264 | Diagnostic Radiology Physician | Mercerville, NJ | 2005 |
| James Callahan, M.D. | 1346568193 | Hospitalist Physician | Douglasville, GA | 2010 |
| James Callahan, DC | 1447264056 | Chiropractor | Amesbury, MA | 2006 |
| James Callahan, R.N.F.A. | 1619013315 | Registered Nurse First Assistant | Portland, OR | 2007 |
| James Callahan, OTR/CHT | 1649419953 | Hand Occupational Therapist | Spring, TX | 2009 |
| James Callahan, M.D. | 1750311098 | Neurological Surgery Physician | Anderson, IN | 2006 |
| James Callahan, DDS | 1770529091 | General Practice Dentistry | Pensacola, FL | 2006 |
| James Callahan, DDS | 1912177064 | General Practice Dentistry | Plymouth, MA | 2008 |
| James Callahan, D.P.M. | 1932462371 | Foot & Ankle Surgery Podiatrist | Virginia Beach, VA | 2012 |
| James Callahan, DMD | 1992741235 | General Practice Dentistry | Pensacola, FL | 2006 |
| Jamie Callahan | 1821691593 | Nurse Practitioner | Denver, CO | 2020 |
| Jamie Callahan, PA | 1912519398 | Physician Assistant | Dallas, TX | 2020 |
| Janasia Callahan | 1851050785 | Case Manager/Care Coordinator | Hammond, LA | 2021 |
| Janelle Callahan | 1548728975 | Massage Therapist | Hamburg, NY | 2019 |
| Janet Callahan, LISW | 1528047198 | Clinical Social Worker | Dubuque, IA | 2006 |
| Janet Callahan, PT | 1699894915 | Physical Therapist | Boston, MA | 2007 |
| Janet Callahan, PMHNP-BC. NP | 1720076953 | Psychiatric/Mental Health Nurse Practitioner | Phoenix, AZ | 2005 |
| Janice Callahan, FNP | 1003224155 | Family Nurse Practitioner | Franklin, TN | 2014 |
| Janis Callahan | 1952872665 | Registered Nurse | Portage, MI | 2018 |
| Jason Callahan | 1013210889 | Mental Health Counselor | Manchester, CT | 2010 |
| Jay Callahan, PHD, LCSW | 1093779498 | Clinical Social Worker | Chicago, IL | 2006 |
| Jay Callahan, LPCC, LADC | 1578081758 | Mental Health Counselor | Saint Paul, MN | 2017 |
| Jazmine Callahan | 1346724697 | Clinical Social Worker | Ogden, UT | 2018 |
| Jean Callahan, FNP-C | 1508419607 | Nurse Practitioner | Wareham, MA | 2019 |
| Jeanette Callahan, MD | 1558345470 | Pediatrics Physician | Cambridge, MA | 2005 |
| Jeffery Callahan | 1407264799 | Marriage & Family Therapist | Murrieta, CA | 2014 |
| Jena Callahan, RBT | 1558285817 | Behavior Technician | Dallas, TX | 2026 |
| Jenna Callahan, LPCC | 1124432240 | Professional Counselor | Somerset, KY | 2014 |
| Jenna Callahan, APRN | 1679938971 | Family Nurse Practitioner | Woonsocket, RI | 2015 |
| Jennah Callahan | 1508671546 | Behavior Technician | Brentwood, CA | 2025 |
| Jennifer Callahan, PSY.D | 1013354166 | Clinical Psychologist | Westlake Village, CA | 2013 |
| Jennifer Callahan | 1104999143 | Pharmacy Technician | Cape Charles, VA | 2006 |
| Jennifer Callahan, MD | 1114417664 | Family Medicine Physician | Rapid City, SD | 2018 |
| Jennifer Callahan, APRN | 1316672116 | Family Nurse Practitioner | Batesville, AR | 2022 |
| Jennifer Callahan, FNP-C | 1417338856 | Family Nurse Practitioner | Fredericksburg, TX | 2015 |
| Jennifer Callahan | 1417768821 | Licensed Practical Nurse | Battle Creek, MI | 2025 |
| Jennifer Callahan, NP | 1467761551 | Nurse Practitioner | Burlington, MA | 2010 |
| Jennifer Callahan, MSP, CCC-SLP | 1639629462 | Speech-Language Pathologist | Greenville, SC | 2016 |
| Jennifer Callahan, CRNA | 1730136623 | Certified Registered Nurse Anesthetist | Sioux Falls, SD | 2006 |
| Jennifer Callahan, MA CCC-LSLP | 1811211402 | Speech-Language Pathologist | Franklinville, NY | 2010 |
| Jennifer Callahan | 1932807690 | Peer Specialist | Commerce, OK | 2023 |
| Jennifer Callahan, LMP | 1972895274 | Massage Therapist | Bremerton, WA | 2011 |
| Jennifer Callahan, PH.D. | 1992917579 | Psychologist | Denton, TX | 2007 |
| Jeremiah Callahan | 1144186024 | Family Nurse Practitioner | Gilbert, AZ | 2026 |
| Jeremy Callahan, PA-C | 1073439196 | Physician Assistant | Pittston, PA | 2026 |
| Jeri Callahan, APRN | 1144763301 | Family Nurse Practitioner | Fort Myers, FL | 2016 |
| Jerry Callahan, RPH | 1316257199 | Pharmacist | Elsberry, MO | 2010 |
| Jerry Callahan | 1710523378 | Addiction (Substance Use Disorder) Counselor | Seattle, WA | 2019 |
| Jesse Callahan, RN | 1518508555 | Registered Nurse | Bay Pines, FL | 2019 |
| Jessica Callahan, M.S., CCC-SLP | 1295214286 | Speech-Language Pathologist | Tallahassee, FL | 2018 |
| Jessica Callahan | 1316743156 | Behavior Technician | Richmond, IN | 2025 |
| Jessica Callahan, MS, RD, LD, CLS | 1447977525 | Registered Dietitian | Lithopolis, OH | 2022 |
| Jessica Callahan, FNP-C | 1659070324 | Family Nurse Practitioner | Gainesville, GA | 2023 |
| Jessica Callahan | 1659070498 | Mental Health Counselor | Denver, CO | 2023 |
| Jessica Callahan | 1770834558 | Chiropractor | West Linn, OR | 2012 |
| Jessica Callahan, LPC-S | 1841587110 | Professional Counselor | Richardson, TX | 2011 |
| Jessica Callahan, L.C.P.C. | 1962778068 | Professional Counselor | Manhattan, IL | 2012 |
| Jillian Callahan | 1730976309 | Behavior Technician | Monrovia, CA | 2025 |
| Jimmy Callahan, FNP-C | 1215969209 | Family Nurse Practitioner | Fort Worth, TX | 2006 |
| Joan Callahan, LICSW | 1659554319 | Mental Health Counselor | Gloucester, MA | 2007 |
| Joanne Callahan | 1205904307 | Family Nurse Practitioner | Hyannis, MA | 2006 |
| Jodi Callahan, LPC, LCAS | 1386915148 | Mental Health Counselor | Winston Salem, NC | 2012 |
| Jodie Callahan, OTR/L | 1881951812 | Pediatric Occupational Therapist | Springfield, VA | 2012 |
| Joel Callahan, M.D | 1235116880 | Neurology Physician | Arden, NC | 2005 |
| Joel Callahan, M.D. | 1699752246 | Gastroenterology Physician | Meridian, MS | 2005 |
| Joellyn Callahan | 1114897444 | Behavior Technician | Olathe, KS | 2025 |
| Johanna Callahan, LMSW | 1093387268 | Social Worker | Urbandale, IA | 2021 |
| John Callahan, BSW, MPA, CCM | 1003061045 | Case Manager/Care Coordinator | Carolina Beach, NC | 2008 |
| John Callahan, D.D.S., M.S. | 1043347438 | Orthodontics and Dentofacial Orthopedics Dentistry | Fayetteville, NY | 2007 |
| John Callahan | 1306345772 | Mental Health Counselor | Cleveland, OH | 2018 |
| John Callahan, PH.D. | 1346264421 | Clinical Psychologist | Hartford, CT | 2006 |
| John Callahan, R.PH. | 1497097885 | Pharmacist | Saint Louis, MO | 2013 |
| John Callahan, MD | 1568454528 | Hospitalist Physician | Syracuse, NY | 2005 |
| John Callahan, PA-C | 1588646962 | Physician Assistant | Pensacola, FL | 2005 |
| John Callahan, BS | 1609092600 | Counselor | Saginaw, MI | 2007 |
| John Callahan, M. D. | 1609988393 | Family Medicine Physician | Aurora, NC | 2006 |
| John Callahan, LCSW-R | 1700959921 | Clinical Social Worker | Goshen, NY | 2006 |
| John Callahan, PTA/COTA | 1750689303 | Physical Therapy Assistant | Concord, NH | 2011 |
| John Callahan, M.D. | 1851704480 | Pediatrics Physician | Dubuque, IA | 2014 |
| John Callahan, D.P.M. | 1861496804 | Podiatrist | Salem, OR | 2005 |
| John Callahan, MD | 1952338048 | Orthopaedic Hand Surgery Physician | Amherst, NY | 2006 |
| Jolene Callahan, FNP-C | 1295496180 | Family Nurse Practitioner | Pensacola, FL | 2022 |
| Jonathan Callahan, HIS | 1144007907 | Hearing Instrument Specialist | Bristol, CT | 2023 |
| Jonathan Callahan, D.C. | 1447276134 | Chiropractor | York, NE | 2006 |
| Jonathan Callahan, DDS | 1770008088 | General Practice Dentistry | Beaumont, TX | 2017 |
| Jonnie Callahan | 1598391872 | Behavior Technician | Jackson, MO | 2020 |
| Jordan Callahan, NDTR | 1386599868 | Registered Dietetic Technician | Arlington, TX | 2026 |
| Jordan Callahan, CPM-TN | 1629351465 | Midwife | Nashville, TN | 2011 |
| Jordan Callahan | 1932698859 | Case Manager/Care Coordinator | Akron, OH | 2018 |
| Joseph Callahan, M.D. | 1023332541 | Obstetrics & Gynecology Physician | Henderson, NC | 2010 |
| Joseph Callahan, ATC | 1104870849 | Athletic Trainer | Glen Cove, NY | 2006 |
| Joseph Callahan, RBT | 1215633953 | Behavior Technician | New Port Richey, FL | 2023 |
| Joseph Callahan, LPN (MILITARY MEDIC) | 1689481400 | Independent Duty Corpsman | Wimauma, FL | 2024 |
| Joseph Callahan, CRNA | 1962446534 | Certified Registered Nurse Anesthetist | Fargo, ND | 2006 |
| Joseph Callahan, M.D. | 1992714240 | Anesthesiology Physician | Fremont, CA | 2006 |
| Julia Callahan, CRNA | 1174845986 | Certified Registered Nurse Anesthetist | Sacramento, CA | 2010 |
| Julia Callahan, COTA | 1184181885 | Occupational Therapy Assistant | Waldorf, MD | 2019 |
| Julia Callahan | 1184298382 | Speech-Language Pathologist | Aurora, IL | 2021 |
| Julia Callahan, MS, RD, LD | 1710344569 | Registered Dietitian | Duluth, GA | 2016 |
| Julia Callahan, MSN, FNP-BC | 1922999663 | Family Nurse Practitioner | Trenton, MI | 2025 |
| Julie Callahan, MA, NCC | 1033478805 | School Counselor | Albemarle, NC | 2012 |
| Julie Callahan, SLP | 1598972093 | Speech-Language Pathologist | Grafton, ND | 2007 |
| Julie Callahan | 1700594132 | Peer Specialist | Columbus, OH | 2022 |
| Julie Callahan, M.S., BCBA | 1720365190 | Behavior Analyst | Norwell, MA | 2011 |
| Justin Callahan, MS | 1235811514 | Mental Health Counselor | Springfield, IL | 2023 |
| Justin Callahan, LCSW | 1700595139 | Clinical Social Worker | Riviera Beach, FL | 2022 |
| Kaitlin Callahan | 1285423723 | Marriage & Family Therapist | Thousand Oaks, CA | 2025 |
| Kaitlin Callahan, RDN | 1760925192 | Registered Dietitian | Tucson, AZ | 2016 |
| Kaitlyn Callahan | 1134646193 | Mental Health Counselor | Westampton, NJ | 2017 |
| Kaitlyn Callahan, MS, CCC-SLP | 1316827827 | Speech-Language Pathologist | Golden, CO | 2025 |
| Kaitlyn Callahan | 1497602825 | Behavior Technician | Palo Alto, CA | 2026 |
| Kaitlyn Callahan, CSWI | 1639054158 | Social Worker | Rangely, CO | 2025 |
| Kaitlynn Callahan | 1487371795 | Behavior Technician | Monrovia, CA | 2022 |
| Kallie Callahan | 1225909344 | Student in an Organized Health Care Education/Training Program | Louisville, KY | 2025 |
| Kaneisha Callahan | 1295583243 | Case Manager/Care Coordinator | Toledo, OH | 2024 |
| Kara Callahan, MD | 1528563533 | Family Medicine Physician | Dayton, OH | 2018 |
| Kara Callahan, MD | 1578901344 | Family Medicine Physician | Lewiston, ME | 2013 |
| Kara Callahan, BS, AAC | 1629570148 | Counselor | Everett, WA | 2018 |
| Karen Callahan, RN | 1104556430 | Gerontology Registered Nurse | Romeo, MI | 2022 |
| Karen Callahan, MD | 1154371508 | Child & Adolescent Psychiatry Physician | Birmingham, AL | 2006 |
| Karen Callahan | 1376050765 | Peer Specialist | Batavia, NY | 2018 |
| Karen Callahan, ARNP | 1538671672 | Nurse Practitioner | Lady Lake, FL | 2017 |
| Karen Callahan, F.N.P. | 1932124443 | Nurse Practitioner | Yuba City, CA | 2006 |
| Karen Callahan, D.D.S. | 1942217724 | Dentist | Sterling, VA | 2006 |
| Kari Callahan, MPT | 1255341848 | Physical Therapist | Berlin, CT | 2006 |
| Karis Callahan, MSW, LICSW | 1730324286 | Clinical Social Worker | Washington, DC | 2008 |
| Karla Callahan, FNP | 1083162986 | Family Nurse Practitioner | Salem, MO | 2016 |
| Kasey Callahan | 1548043946 | Massage Therapist | Marion, IL | 2023 |
| Kate Callahan, PT | 1063403178 | Geriatric Physical Therapist | Springfield, MA | 2005 |
| Kate Callahan, PA-C | 1154727741 | Physician Assistant | Houston, TX | 2014 |
| Katelyn Callahan, PT | 1083255947 | Physical Therapist | Scappoose, OR | 2019 |
| Katharine Callahan, MD | 1891119319 | Neonatal-Perinatal Medicine Physician | Philadelphia, PA | 2014 |
| Katherine Callahan, MD | 1164009221 | Neurological Surgery Physician | Salt Lake City, UT | 2021 |
| Katherine Callahan, DO | 1215296926 | Family Medicine Physician | Lafayette, CO | 2012 |
| Katherine Callahan, LCSW-C | 1598852212 | Clinical Social Worker | Easton, MD | 2006 |
| Katherine Callahan, RN, MSN, CNS, FNP-BC | 1780766972 | Family Nurse Practitioner | Lapel, IN | 2006 |
| Katherine Callahan, PHARMD | 1932800109 | Pharmacist | Bay Pines, FL | 2023 |
| Katherine Callahan, M.D. | 1942567920 | Anatomic Pathology & Clinical Pathology Physician | Albuquerque, NM | 2012 |
| Kathleen Callahan, PA-C | 1033766902 | Physician Assistant | Phoenix, AZ | 2019 |
| Kathleen Callahan, M.S., CCC-SLP | 1144572397 | Speech-Language Pathologist | Foxboro, MA | 2012 |
| Kathleen Callahan, LICSW | 1164730024 | Clinical Social Worker | Jamaica Plain, MA | 2010 |
| Kathleen Callahan, LCSW | 1225382781 | Clinical Social Worker | Aspen, CO | 2012 |
| Kathleen Callahan | 1306717087 | Social Worker | Cambridge, MA | 2025 |
| Kathleen Callahan, LMT | 1346701083 | Massage Therapist | Towson, MD | 2019 |
| Kathleen Callahan | 1356788343 | Speech/Language/Hearing Specialist/Technologist | Rockville Centre, NY | 2013 |
| Kathleen Callahan, R.D. | 1376682450 | Registered Dietitian | Albany, NY | 2007 |
| Kathleen Callahan, MS ED | 1386769396 | Other Technician | Bristol, TN | 2007 |
| Kathleen Callahan, COTA L | 1396964219 | Occupational Therapy Assistant | Norwood, MA | 2007 |
| Kathleen Callahan, CRNA | 1528172020 | Certified Registered Nurse Anesthetist | Greenville, SC | 2006 |
| Kathleen Callahan, CRNA | 1699815480 | Certified Registered Nurse Anesthetist | Framingham, MA | 2007 |
| Kathleen Callahan, PPS | 1700720554 | School Counselor | Santa Paula, CA | 2026 |
| Kathryn Callahan, MD | 1134914617 | Obstetrics & Gynecology Physician | Providence, RI | 2025 |
| Kathryn Callahan, M.D. | 1346396694 | Geriatric Medicine (Internal Medicine) Physician | Winston Salem, NC | 2007 |
| Kathryn Callahan, MS, RDN, LD | 1356992937 | Registered Dietitian | Boise, ID | 2019 |
| Kathryn Callahan | 1366256091 | Behavior Technician | Fort Wayne, IN | 2025 |
| Kathryn Callahan, LCSW, CASAC, CEAP | 1760698427 | Addiction (Substance Use Disorder) Counselor | Yonkers, NY | 2007 |
| Kathryn Callahan | 1942418777 | Physical Therapy Assistant | Newton, MA | 2007 |
| Kathy Callahan, LAPC | 1811328644 | Professional Counselor | Cumming, GA | 2013 |
| Kathy Ann Callahan, LCSW | 1710219332 | Clinical Social Worker | Wayne, NJ | 2010 |
| Katie Callahan | 1033051453 | Nutritionist | Roseville, CA | 2026 |
| Katie Callahan, DPT | 1184344483 | Physical Therapist | New Wilmington, PA | 2022 |
| Katie Callahan, FNP | 1437867926 | Family Nurse Practitioner | Reno, NV | 2022 |
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).