Providers Michelle Callahan to Tyrone Callahan
300 individual NPIs in the federal registry, part 3,169 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 |
|---|---|---|---|---|
| Michelle Callahan | 1881228674 | Mental Health Counselor | Livonia, MI | 2020 |
| Michelle Callahan, LPC | 1992192397 | Professional Counselor | Allentown, PA | 2015 |
| Mikaela Callahan, OD | 1972397222 | Optometrist | Bradenton, FL | 2025 |
| Mike Callahan | 1942938378 | Counselor | Sacramento, CA | 2022 |
| Miles Callahan | 1699268284 | Occupational Therapist | Chicago, IL | 2018 |
| Mindee Callahan, LSW | 1164010120 | Social Worker | Hamilton, OH | 2021 |
| Miriam Callahan, MD | 1437739943 | Student in an Organized Health Care Education/Training Program | New York, NY | 2021 |
| Mitchell Callahan | 1629689377 | Certified Registered Nurse Anesthetist | Houma, LA | 2020 |
| Moira Callahan | 1881410850 | Mental Health Counselor | Wheaton, IL | 2024 |
| Molly Callahan, RN | 1275371189 | Registered Nurse | Saint Cloud, MN | 2024 |
| Molly Callahan | 1487548061 | Nurse Practitioner | Dodgeville, WI | 2025 |
| Molly Callahan, RN | 1659089068 | Pediatric Nurse Practitioner | Boston, MA | 2022 |
| Molly Callahan, LPC | 1760378202 | Professional Counselor | Prairie Village, KS | 2025 |
| Molly Callahan, MS | 1912417510 | Mental Health Counselor | Vancouver, WA | 2017 |
| Monica Callahan, OTD | 1467349852 | Pediatric Occupational Therapist | Aurora, CO | 2025 |
| Monika Callahan | 1871278374 | Peer Specialist | Lacey, WA | 2023 |
| Monique Callahan | 1265318166 | Behavior Technician | Rockville, MD | 2025 |
| Morgan Callahan, DO | 1639562622 | Plastic Surgery Physician | Marlton, NJ | 2015 |
| Morgan Callahan, BA | 1720840671 | Addiction (Substance Use Disorder) Counselor | Plymouth, MA | 2024 |
| Morgan Callahan | 1932593266 | Pain Medicine (Physical Medicine & Rehabilitation) Physician | Sarasota, FL | 2015 |
| Myfanwy Callahan, M.D. | 1538428685 | Internal Medicine Physician | Medford, MA | 2012 |
| Myla Callahan, CDCA, OCPSA | 1548940679 | Addiction (Substance Use Disorder) Counselor | Cambridge, OH | 2023 |
| Myra Callahan | 1003237264 | Case Manager/Care Coordinator | Kennett, MO | 2013 |
| Myraiah Callahan, B.A. | 1932575925 | Mental Health Counselor | Thornton, CO | 2015 |
| Nadine Callahan, M.D. | 1194015511 | Anesthesiology Physician | Atlanta, GA | 2011 |
| Nadine Callahan | 1669234068 | Personal Care Attendant | Las Vegas, NV | 2024 |
| Nadira Callahan | 1285577536 | Adult Companion | Urbana, OH | 2026 |
| Nadja Callahan, MSED | 1861756462 | Specialist | Briarwood, NY | 2012 |
| Nancy Callahan, LCSW MSW | 1639258213 | Clinical Social Worker | Teaneck, NJ | 2006 |
| Nancy Callahan | 1700442605 | Massage Therapist | Lewiston, ME | 2019 |
| Naomi Callahan | 1477061737 | Health Educator | Springboro, OH | 2018 |
| Natalie Callahan | 1285473637 | Student in an Organized Health Care Education/Training Program | Madison, WI | 2024 |
| Natasha Callahan | 1073286241 | Mental Health Counselor | Charlotte, NC | 2021 |
| Nathan Callahan | 1275452518 | Mental Health Counselor | Blackwood, NJ | 2026 |
| Nathan Callahan | 1477955953 | Orthopedic Physical Therapist | Novi, MI | 2014 |
| Neil Callahan, O.D. | 1568568277 | Optometrist | Hermitage, PA | 2006 |
| Nicholas Callahan, MPH DMD MD | 1083920227 | Oral & Maxillofacial Surgery (D.M.D.) | Chicago, IL | 2010 |
| Nicholas Callahan, DO | 1659783934 | Orthopaedic Surgery Physician | Mayfield Heights, OH | 2014 |
| Nicholas Callahan, MSN, CRNA | 1750901757 | Certified Registered Nurse Anesthetist | Grand Rapids, MI | 2020 |
| Nicole Callahan | 1356803324 | Behavior Technician | Tucson, AZ | 2019 |
| Nicole Callahan, RN | 1548800089 | Hemodialysis Registered Nurse | Maple Heights, OH | 2020 |
| Nicole Callahan, NP | 1760779706 | Nurse Practitioner | Rochester, MN | 2011 |
| Nicole Callahan, LMT | 1801405824 | Massage Therapist | St George, UT | 2020 |
| Nila Callahan | 1932888732 | Peer Specialist | Louisa, KY | 2023 |
| Nina Callahan, PA | 1083440325 | Medical Physician Assistant | East Northport, NY | 2024 |
| Nina Callahan, M.S., CF-SLP, TSSLD | 1871320127 | Speech-Language Pathologist | Saint Clair Shores, MI | 2024 |
| Nora Callahan | 1356229256 | Family Nurse Practitioner | El Paso, TX | 2025 |
| Nora Callahan, OTR | 1487876819 | Occupational Therapist | Hawthorne, NJ | 2007 |
| Norman Callahan, D.O. | 1851367783 | Gastroenterology Physician | Malvern, PA | 2006 |
| Octavia Callahan | 1326754953 | Health & Wellness Coach | Houston, TX | 2023 |
| Olivia Callahan, PA-C | 1134602352 | Physician Assistant | Alcoa, TN | 2018 |
| Orla Callahan | 1477889756 | Acupuncturist | Natick, MA | 2009 |
| Paige Callahan, LMHC | 1013523877 | Mental Health Counselor | Taunton, MA | 2020 |
| Patricia Callahan, MD | 1023010543 | Pediatrics Physician | Eugene, OR | 2005 |
| Patricia Callahan, CRNP | 1053481085 | Women's Health Nurse Practitioner | Philadelphia, PA | 2006 |
| Patricia Callahan, NP | 1215361704 | Obstetrics & Gynecology Nurse Practitioner | Santa Maria, CA | 2013 |
| Patricia Callahan, R.PH. | 1386836229 | Pharmacist | Cambridge, MA | 2007 |
| Patricia Callahan, MA | 1497024566 | Case Manager/Care Coordinator | Tulsa, OK | 2011 |
| Patricia Callahan | 1538931936 | Clinical Social Worker | Dallas, TX | 2023 |
| Patricia Callahan, PHARMD | 1770109712 | Pharmacist | Kansas City, MO | 2020 |
| Patricia Callahan, MED, CRC | 1902273543 | Mental Health Counselor | New York, NY | 2015 |
| Patricia Callahan, RPH | 1932295623 | Pharmacotherapy Pharmacist | Manchester, NH | 2006 |
| Patricia Callahan, LIC. AC. | 1962555953 | Acupuncturist | Cambridge, MA | 2007 |
| Patrick Callahan, LATC | 1235549767 | Athletic Trainer | Valley City, ND | 2014 |
| Patrick Callahan | 1285413567 | Behavior Technician | Largo, FL | 2023 |
| Patrick Callahan, PHYSICAL THERAPIST | 1376614875 | Physical Therapist | Redwood City, CA | 2006 |
| Patrick Callahan, MD | 1447218060 | Anesthesiology Physician | Chestertown, MD | 2006 |
| Patrick Callahan, M.D. | 1487616082 | Pediatric Cardiology Physician | Fairfax, VA | 2006 |
| Patrick Callahan, M.D. | 1497286926 | Family Medicine Physician | Everett, WA | 2017 |
| Patrick Callahan | 1669616405 | Anesthesiology Physician | Tampa, FL | 2009 |
| Patrick Callahan, PH.D. | 1740593441 | Clinical Psychologist | Fort Bragg, NC | 2010 |
| Patrick Callahan, LCSW | 1962264101 | Clinical Social Worker | Ashland, KY | 2024 |
| Patrick Callahan, M.D | 1972569481 | Anesthesiology Physician | Hoffman Estates, IL | 2006 |
| Patrina Callahan, BCBA | 1093180390 | Behavior Analyst | San Antonio, TX | 2015 |
| Patsy Callahan | 1598384976 | Home Health Aide | San Antonio, TX | 2020 |
| Patty Callahan, PHARMD | 1811329584 | Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist | Birmingham, AL | 2013 |
| Paul Callahan, PSY.D. | 1114062239 | Clinical Child & Adolescent Psychologist | Cambridge, MA | 2007 |
| Paul Callahan | 1164394821 | Professional Counselor | San Diego, CA | 2025 |
| Paul Callahan, D.M.D. | 1205044351 | Dentist | Garden City, NY | 2007 |
| Paul Callahan, ED.D | 1487370664 | Pastoral Counselor | Tampa, FL | 2022 |
| Paul Callahan, D.D.S. | 1922015882 | Dentist | Sterling, VA | 2006 |
| Paul Callahan, MD | 1972393650 | Student in an Organized Health Care Education/Training Program | Camden, NJ | 2025 |
| Paula Callahan, RN | 1043562424 | Registered Nurse | Whitesboro, NY | 2012 |
| Paula Callahan, LCSW. | 1134287972 | Clinical Social Worker | Albion, NY | 2006 |
| Peggy Callahan, MD | 1093732661 | Family Medicine Physician | West Allis, WI | 2006 |
| Peter Callahan, LGSW | 1205834389 | Clinical Social Worker | Martinsburg, WV | 2005 |
| Philip Callahan, LCSW-C | 1487775540 | Clinical Social Worker | Baltimore, MD | 2007 |
| Philip Callahan, DVM | 1588857254 | Veterinarian | Orlando, FL | 2007 |
| Phillip Callahan | 1760258743 | Community Health Worker | Burlington, VT | 2023 |
| Precious Callahan | 1518741826 | Behavior Technician | Douglasville, GA | 2023 |
| Princess Callahan | 1407453277 | Contractor | Ft Lauderdale, FL | 2020 |
| Rachael Callahan, PA-C | 1992097315 | Physician Assistant | Neenah, WI | 2011 |
| Rachel Callahan | 1073015376 | Physical Therapist | Chesaning, MI | 2018 |
| Rachel Callahan, BCBA | 1851808166 | Behavior Analyst | Rosenberg, TX | 2018 |
| Rachelle Callahan | 1447805858 | Physical Therapist | Garden City, NY | 2019 |
| Randi Callahan, M.D. | 1780621961 | Family Medicine Physician | Erlanger, KY | 2006 |
| Randy Callahan, P.A. | 1629246202 | Physician Assistant | Fresno, CA | 2008 |
| Raquel Callahan, BSN, R.N. | 1295144129 | Case Manager/Care Coordinator | Anchorage, AK | 2014 |
| Rebecca Callahan, MSN, WHCNP | 1073813960 | Women's Health Nurse Practitioner | New York, NY | 2010 |
| Rebecca Callahan | 1205223302 | Physical Therapist | Paterson, NJ | 2015 |
| Rebecca Callahan | 1215568399 | Contractor | Beaverton, OR | 2020 |
| Rebecca Callahan, LMSW | 1285380337 | Social Worker | Kansas City, KS | 2022 |
| Rebecca Callahan, PA-C | 1649880931 | Medical Physician Assistant | Baltimore, MD | 2020 |
| Rebecca Callahan, O.D., M.B.A. | 1659807741 | Optometrist | Milford, OH | 2017 |
| Rebecca Callahan, PHARM.D. | 1821835349 | Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist | Farragut, TN | 2024 |
| Rebecca Callahan, DO | 1992206932 | Pediatrics Physician | Louisville, KY | 2018 |
| Rebekah Callahan, LMFT | 1942504071 | Marriage & Family Therapist | Lake Stevens, WA | 2011 |
| Regina Callahan, L.M.T. | 1083873731 | Massage Therapist | Bend, OR | 2008 |
| Reilly Callahan, MA,MD | 1598603193 | Student in an Organized Health Care Education/Training Program | Abington, PA | 2026 |
| Rena Callahan, M.D. | 1487856779 | Internal Medicine Physician | Valencia, CA | 2007 |
| Renae Callahan | 1164016408 | Nurse Practitioner | Morton, IL | 2021 |
| Renee Callahan, MOT, OTR/L | 1720397623 | Occupational Therapist | Augusta, ME | 2010 |
| Reyia Callahan, MS | 1942809439 | Mental Health Counselor | Jacksonville, FL | 2020 |
| Rhanda Callahan, PHARMD | 1053076067 | Pharmacist | Port Allen, LA | 2021 |
| Richard Callahan, DDS | 1124124201 | Dentist | Lakewood, CO | 2006 |
| Richard Callahan, MD | 1215378336 | Child & Adolescent Psychiatry Physician | Aventura, FL | 2013 |
| Richard Callahan | 1346541950 | Counselor | Juneau, AK | 2010 |
| Richard Callahan, D.D.S. | 1457579054 | Orthodontics and Dentofacial Orthopedics Dentistry | Downers Grove, IL | 2007 |
| Richard Callahan, MSPA, PA-C | 1891785671 | Medical Physician Assistant | Burlington, VT | 2005 |
| Ricky Callahan | 1487442109 | Behavior Technician | Plantation, FL | 2025 |
| Riley Callahan | 1811798499 | Behavior Technician | Orlando, FL | 2025 |
| Riley Callahan, SW | 1831010198 | Social Worker | Erie, PA | 2026 |
| Rita Callahan | 1609699545 | Social Worker | Brockton, MA | 2024 |
| Robert Callahan, PT,DPT | 1063059608 | Physical Therapist | East Meadow, NY | 2019 |
| Robert Callahan, MD | 1174532865 | Family Medicine Physician | Des Moines, IA | 2006 |
| Robert Callahan, M.D. | 1235392366 | Emergency Medicine Physician | Springfield, OR | 2008 |
| Robert Callahan, D.O. | 1306248018 | Family Medicine Physician | Poulsbo, WA | 2014 |
| Robert Callahan | 1306643499 | Home Health Aide | Norwell, MA | 2025 |
| Robert Callahan, P.T.A. | 1508261199 | Physical Therapy Assistant | Hatboro, PA | 2014 |
| Robert Callahan, M.D. | 1528033180 | Family Medicine Physician | Virginia Beach, VA | 2006 |
| Robert Callahan, DDS | 1730232042 | General Practice Dentistry | Johnstown, PA | 2007 |
| Robert Callahan, PHARM. D. | 1831838143 | Pharmacist | Batesville, AR | 2022 |
| Robert Callahan, D.C. | 1841512860 | Chiropractor | Jacksonville, FL | 2010 |
| Robert Callahan, MD | 1881795383 | Surgery Physician | Carthage, TX | 2006 |
| Robert Callahan, MD | 1962491779 | Family Medicine Physician | Newark, DE | 2005 |
| Robin Callahan | 1194142786 | Case Manager/Care Coordinator | Kennett, MO | 2014 |
| Robin Callahan, DPT | 1669546958 | Physical Therapist | Tempe, AZ | 2006 |
| Robin Callahan | 1871414219 | Pediatric Occupational Therapist | Rocky River, OH | 2026 |
| Robyn Callahan, MSW, LICSW | 1184055824 | Clinical Social Worker | Federal Way, WA | 2013 |
| Rosalie Callahan | 1043412224 | Occupational Therapist | Ronkonkoma, NY | 2007 |
| Rosemary Callahan | 1922852508 | Counselor | Waukegan, IL | 2024 |
| Ross Callahan | 1598218778 | Counselor | Beverly, MA | 2016 |
| Roz Callahan | 1073384061 | Certified Registered Nurse Anesthetist | Greenville, SC | 2024 |
| Russell Callahan | 1932830395 | Student in an Organized Health Care Education/Training Program | Rapid City, SD | 2022 |
| Ruth Callahan, PCD | 1366771495 | Doula | New York, NY | 2009 |
| Ryan Callahan, M.D. | 1023271749 | Pediatric Cardiology Physician | Philadelphia, PA | 2008 |
| Ryan Callahan, DO | 1053250597 | Student in an Organized Health Care Education/Training Program | Gainesville, FL | 2026 |
| Ryan Callahan, DPM | 1265010284 | Podiatrist | Boston, MA | 2021 |
| Ryan Callahan, ATC, LAT | 1417121708 | Athletic Trainer | Cedar Falls, IA | 2008 |
| Ryan Callahan, A.P., L.M.T | 1669399150 | Acupuncturist | Gainesville, FL | 2026 |
| Ryan Callahan, MPH, PA-C | 1679083810 | Physician Assistant | Delray Beach, FL | 2017 |
| Ryan Callahan | 1871201855 | Physician Assistant | Billings, MT | 2022 |
| Ryan Callahan, D.O | 1962765222 | Orthopaedic Surgery Physician | Rupert, ID | 2012 |
| S Callahan, M.D. | 1619013703 | Internal Medicine Physician | Seattle, WA | 2007 |
| Sadie Callahan | 1750957106 | Personal Care Attendant | Hinton, WV | 2021 |
| Sage Callahan | 1598284036 | Counselor | Taylorsville, UT | 2017 |
| Sally Callahan, DPH | 1609406685 | Pharmacist | Yukon, OK | 2020 |
| Sam Callahan, DPT | 1366828402 | Physical Therapist | Evansville, IN | 2015 |
| Samantha Callahan | 1265210074 | Counselor | Bellevue, WA | 2023 |
| Samantha Callahan, DPT | 1730652835 | Physical Therapist | Chicago, IL | 2019 |
| Samantha Callahan, D.D.S. | 1851383848 | Dentist | Phoenix, AZ | 2005 |
| Samantha Callahan, LPC | 1942031067 | Professional Counselor | Lake Saint Louis, MO | 2024 |
| Sandra Callahan, LPN | 1619135662 | Licensed Practical Nurse | Butler, MO | 2008 |
| Sara Callahan, LPC | 1063843860 | Professional Counselor | Darien, CT | 2013 |
| Sara Callahan, LPTA | 1265090633 | Physical Therapy Assistant | Clarksville, VA | 2019 |
| Sara Callahan, FNP | 1942722533 | Family Nurse Practitioner | Charlestown, MA | 2017 |
| Sarah Callahan | 1093122863 | Developmental Therapist | Milford, MA | 2014 |
| Sarah Callahan | 1093428930 | Student in an Organized Health Care Education/Training Program | Pensacola, FL | 2023 |
| Sarah Callahan, LMSW | 1144890393 | Social Worker | Brooklyn, NY | 2021 |
| Sarah Callahan | 1184586810 | Behavior Technician | Brentwood, TN | 2025 |
| Sarah Callahan, LMSW | 1215436936 | Social Worker | Elmira, NY | 2018 |
| Sarah Callahan | 1255107660 | Mental Health Counselor | East Flat Rock, NC | 2023 |
| Sarah Callahan | 1366157844 | Massage Therapist | Anderson, CA | 2023 |
| Sarah Callahan, PT, DPT | 1437574837 | Pediatric Physical Therapist | Charlotte, NC | 2014 |
| Sarah Callahan, M.D. | 1831220557 | Diagnostic Radiology Physician | Louisville, KY | 2007 |
| Sarah Callahan | 1881944288 | Medical Physician Assistant | Falmouth, MA | 2012 |
| Sarah Callahan | 1972003713 | Licensed Vocational Nurse | Sherman, TX | 2018 |
| Savannah Callahan | 1467026757 | Behavior Technician | Enid, OK | 2021 |
| Scot Callahan, MD | 1023096427 | Otolaryngology Physician | Enterprise, AL | 2006 |
| Scot Callahan, MD, PHD | 1700527959 | Radiation Oncology Physician | Madison, WI | 2022 |
| Scott Callahan, PA-C | 1205892452 | Surgical Physician Assistant | Derby, CT | 2006 |
| Scott Callahan, CRNA | 1538122726 | Certified Registered Nurse Anesthetist | Ypsilanti, MI | 2006 |
| Scott Callahan, MD | 1790733194 | Pediatrics Physician | Cincinnati, OH | 2006 |
| Sean Callahan, M.D. | 1043505670 | Pulmonary Disease Physician | Greenville, SC | 2011 |
| Sean Callahan | 1083189393 | Professional Counselor | Portland, OR | 2018 |
| Sean Callahan, M.D. | 1194811828 | Family Medicine Physician | Oak Harbor, OH | 2006 |
| Sean Callahan | 1205594538 | Student in an Organized Health Care Education/Training Program | Colville, WA | 2021 |
| Sean Callahan | 1205695608 | Internal Medicine Physician | Maywood, IL | 2024 |
| Sean Callahan | 1336402940 | Pulmonary Disease Physician | Ann Arbor, MI | 2012 |
| Sean Callahan, MD | 1366641581 | Otolaryngology Physician | Fort Worth, TX | 2007 |
| Sean Callahan, R.P.T. | 1639191901 | Orthopedic Physical Therapist | Covina, CA | 2006 |
| Sean Callahan, LCDC | 1669853313 | Addiction (Substance Use Disorder) Counselor | Corpus Christi, TX | 2015 |
| Sean Callahan, LCSW | 1952005621 | Clinical Social Worker | Western Springs, IL | 2023 |
| Seth Callahan, PA-C | 1548833577 | Physician Assistant | Newark, DE | 2021 |
| Shae Callahan | 1396377842 | Behavior Technician | Farmington Hills, MI | 2020 |
| Shane Callahan | 1649081126 | Peer Specialist | Muskogee, OK | 2025 |
| Shannon Callahan | 1154922060 | Clinical Social Worker | Evansville, IN | 2020 |
| Shannon Callahan, RN | 1295949261 | Registered Nurse | Sitka, AK | 2007 |
| Shannon Callahan | 1366128787 | Behavior Technician | Irvine, CA | 2023 |
| Shannon Callahan, RN | 1467725135 | Registered Nurse | Wausau, WI | 2012 |
| Shannon Callahan, MCD, CCC-SLP | 1639829948 | Speech-Language Pathologist | New Orleans, LA | 2022 |
| Shannon Callahan | 1730938648 | Homemaker | Franklin, OH | 2024 |
| Shannon Callahan, LPC | 1790446706 | Mental Health Counselor | Oakbrook Terrace, IL | 2022 |
| Shannon Callahan, B.S.W | 1841039732 | Behavior Technician | Raleigh, NC | 2024 |
| Sharon Callahan | 1467726489 | Massage Therapist | Gainesville, FL | 2012 |
| Sharon Callahan | 1538601935 | Other Technician | West Plains, MO | 2016 |
| Sharon Callahan, LCSW | 1871657312 | Clinical Social Worker | Arnold, MO | 2006 |
| Shawn Callahan | 1285575191 | Student in an Organized Health Care Education/Training Program | Jeffersonville, IN | 2026 |
| Shayla Callahan, RN, CRNA | 1306226402 | Certified Registered Nurse Anesthetist | Greenville, SC | 2015 |
| Sheana Callahan, DNP | 1538906821 | Psychiatric/Mental Health Nurse Practitioner | Tampa, FL | 2024 |
| Sheila Callahan, MS, OTR/L | 1225294044 | Pediatric Occupational Therapist | Macedon, NY | 2008 |
| Shelbi Callahan, ASW | 1205355963 | Mental Health Counselor | Santee, CA | 2017 |
| Shelby Callahan | 1295402451 | Speech-Language Pathologist | Saint Charles, MO | 2021 |
| Shelley Callahan, BCBA | 1316500663 | Behavior Analyst | Columbus, GA | 2019 |
| Shelly Callahan, LAC | 1245797547 | Acupuncturist | Derby, KS | 2019 |
| Sherry Callahan, FNP | 1669552642 | Family Nurse Practitioner | Corinth, MS | 2006 |
| Shields Callahan, M.D. | 1265787618 | MOHS-Micrographic Surgery Physician | Lynchburg, VA | 2012 |
| Shira Callahan | 1164088779 | Counselor | Starke, FL | 2019 |
| Shymane Callahan | 1053898569 | Addiction (Substance Use Disorder) Counselor | Los Angeles, CA | 2018 |
| Sidney Callahan, D.O. | 1083875223 | Obstetrics & Gynecology Physician | Greensboro, NC | 2008 |
| Sonja Callahan | 1366217960 | Day Training/Habilitation Specialist | Anchorage, AK | 2023 |
| Sophie Callahan | 1215642236 | Physician Assistant | Los Angeles, CA | 2023 |
| Soraya Callahan | 1285505891 | Registered Nurse | Tampa, FL | 2025 |
| Spencer Callahan, D.C. | 1437570462 | Chiropractor | Fairhope, AL | 2013 |
| Stacey Callahan, DPT | 1467885103 | Physical Therapist | Wadena, MN | 2013 |
| Stacey Callahan | 1609594183 | Behavior Technician | Largo, FL | 2022 |
| Staci Callahan | 1134083942 | Home Health Aide | Wayne, WV | 2025 |
| Stephanie Callahan, MSN, RN | 1104523091 | Registered Nurse | Wichita, KS | 2023 |
| Stephanie Callahan | 1235931247 | Licensed Practical Nurse | Eureka, MT | 2025 |
| Stephanie Callahan, L.M.B.T. | 1407748338 | Massage Therapist | Jacksonville, NC | 2025 |
| Stephanie Callahan, LSW | 1558197194 | Social Worker | La Porte, IN | 2024 |
| Stephen Callahan, MD, MPH | 1104913219 | Adolescent Medicine (Internal Medicine) Physician | Nashville, TN | 2006 |
| Stephen Callahan, PA-C | 1285082552 | Physician Assistant | Fort Wainwright, AK | 2016 |
| Stephen Callahan | 1588877708 | Occupational Therapist | Greenwood Village, CO | 2007 |
| Steven Callahan, M.D. | 1164485991 | Emergency Medicine Physician | Newport Beach, CA | 2006 |
| Steven Callahan, PH.D. | 1275677643 | Clinical Psychologist | Houston, TX | 2007 |
| Stewart Callahan, LPC | 1851484869 | Professional Counselor | Mechanicsville, VA | 2006 |
| Summer Callahan | 1700752128 | Family Nurse Practitioner | Lake Orion, MI | 2025 |
| Susan Callahan | 1275949604 | Speech-Language Pathologist | Plainfield, IL | 2014 |
| Susan Callahan | 1578001137 | Speech-Language Pathologist | Morgantown, WV | 2017 |
| Susan Callahan | 1760949929 | Child & Adolescent Psychiatric/Mental Health Registered Nurse | Greenfield, MA | 2019 |
| Susan Callahan, LCSW, LCAC | 1861443756 | Clinical Social Worker | Westfield, IN | 2006 |
| Susan Callahan, NP | 1881683274 | Adult Health Nurse Practitioner | Stony Brook, NY | 2005 |
| Susan Callahan, MSW, LICSW | 1932779683 | Clinical Social Worker | Martinsburg, WV | 2021 |
| Susan Callahan | 1982945531 | Developmental Therapist | Buffalo Grove, IL | 2013 |
| Sydni Callahan | 1265367544 | Family Nurse Practitioner | Leesville, LA | 2026 |
| Tad Callahan, MD | 1225112931 | Obstetrics & Gynecology Physician | Santa Maria, CA | 2006 |
| Tamara Callahan, M.D. | 1558308296 | Obstetrics & Gynecology Physician | Louisville, KY | 2006 |
| Tamela Callahan, FNP-C | 1184269599 | Family Nurse Practitioner | Flint, TX | 2019 |
| Tammy Callahan | 1356756183 | Mental Health Counselor | Hot Springs, AR | 2014 |
| Tanesha Callahan, LPC | 1285024802 | Professional Counselor | Lawrenceville, GA | 2015 |
| Tara Callahan, PTA | 1477837227 | Physical Therapy Assistant | Greenwood, SC | 2011 |
| Taryn Callahan, PHARMD | 1093085235 | Pharmacist | Smyrna, DE | 2012 |
| Taryn Callahan, CMT | 1922875905 | Massage Therapist | Harrisonburg, VA | 2023 |
| Tauna Callahan, LMT | 1285066571 | Specialist | Portland, OR | 2013 |
| Taylor Callahan, PTA, MT | 1154970820 | Physical Therapy Assistant | Henderson, NV | 2019 |
| Taylor Callahan, PA-C | 1245752468 | Physician Assistant | Hickory, NC | 2017 |
| Ted Callahan, RPH | 1629378229 | Pharmacist | Salida, CO | 2010 |
| Tena Callahan | 1891353595 | Developmental Therapist | Dekalb, IL | 2019 |
| Teresa Callahan, FNP | 1093796435 | Family Nurse Practitioner | Midland, TX | 2005 |
| Teresa Callahan, RN | 1477801801 | Flight Registered Nurse | Billings, MT | 2012 |
| Teresa Callahan, PA-C | 1699715649 | Physician Assistant | Portsmouth, NH | 2006 |
| Terra Callahan, M.D. | 1275702763 | Family Medicine Physician | Fort Campbell, KY | 2008 |
| Terrence Callahan, DO | 1104870468 | Emergency Medicine Physician | Albuquerque, NM | 2006 |
| Theresa Callahan, M.D. | 1861480931 | Pediatrics Physician | Leominster, MA | 2005 |
| Thomas Callahan, MD | 1023004520 | Clinical Cardiac Electrophysiology Physician | Cleveland, OH | 2005 |
| Thomas Callahan, M.D. | 1043328123 | Family Medicine Physician | St George, UT | 2006 |
| Thomas Callahan, RPH | 1073133401 | Pharmacist | Batavia, OH | 2020 |
| Thomas Callahan, D.O. | 1164861027 | Family Medicine Physician | Phoenix, AZ | 2013 |
| Thomas Callahan, PTA | 1275075889 | Physical Therapy Assistant | Jacksonville, FL | 2016 |
| Thomas Callahan, MSW | 1407845233 | Clinical Social Worker | Phoenix, AZ | 2005 |
| Thomas Callahan, D.D.S. | 1467570630 | General Practice Dentistry | Atlanta, GA | 2007 |
| Thomas Callahan, MD | 1508809138 | Vascular & Interventional Radiology Physician | Fort Worth, TX | 2006 |
| Thomas Callahan, D.O. | 1528262136 | Pediatrics Physician | Dubuque, IA | 2007 |
| Thomas Callahan | 1598619363 | Student in an Organized Health Care Education/Training Program | North Chicago, IL | 2026 |
| Thomas Callahan, PH.D. | 1861622870 | School Psychologist | Newport, RI | 2009 |
| Tia Callahan | 1407930597 | Certified Registered Nurse Anesthetist | Danville, PA | 2006 |
| Tierra Callahan | 1215863279 | Behavior Technician | Fairfax, VA | 2026 |
| Tiffany Callahan | 1538800214 | General Practice Registered Nurse | Kingman, AZ | 2022 |
| Timothy Callahan, DDS | 1275633836 | General Practice Dentistry | Walnut Creek, CA | 2006 |
| Timothy Callahan, P.A.C. | 1427064799 | Medical Physician Assistant | Sunnyside, UT | 2006 |
| Timothy Callahan, SLPA | 1437505567 | Speech-Language Assistant | Phoenix, AZ | 2016 |
| Timothy Callahan, M.ED.,L.P.C. | 1447621586 | Professional Counselor | Vineland, NJ | 2015 |
| Timothy Callahan | 1760129597 | Behavior Technician | Newton, MA | 2022 |
| Timothy Callahan, DDS | 1780045112 | General Practice Dentistry | Matthews, NC | 2016 |
| Timothy Callahan, PSY.D. | 1861850026 | Clinical Psychologist | Yellow Springs, OH | 2016 |
| Tina Callahan | 1316203326 | Nurse's Aide | Wooster, OH | 2012 |
| Tonya Callahan | 1568683191 | Emergency Medicine Physician | Decatur, GA | 2007 |
| Tonya Callahan, MS CRC LPC | 1639804107 | Professional Counselor | Wisconsin Rapids, WI | 2022 |
| Tracey Callahan, M.S. | 1083808109 | Speech-Language Pathologist | South Boston, MA | 2007 |
| Traci Callahan, PLPC | 1003344748 | Professional Counselor | Saint Peters, MO | 2017 |
| Tracy Callahan, CDCA | 1114796562 | Addiction (Substance Use Disorder) Counselor | Cleveland Hts, OH | 2023 |
| Tracy Callahan, PA | 1295115889 | Physician Assistant | Stoughton, MA | 2015 |
| Tracy Callahan, RN | 1699819375 | Registered Nurse | Bolivar, TN | 2007 |
| Travis Callahan, PA | 1609258359 | Medical Physician Assistant | Nellis Afb, NV | 2015 |
| Troy Callahan, MD | 1962444976 | Plastic Surgery Physician | Englewood, NJ | 2006 |
| Ty Callahan, PH.D., A.B.P.P. | 1992829022 | Psychologist | Omaha, NE | 2007 |
| Tyler Callahan, DO | 1053608885 | Family Medicine Physician | New Castle, IN | 2011 |
| Tyler Callahan | 1154989440 | Pharmacy Technician | Meridian, ID | 2019 |
| Tyrone Callahan | 1720648645 | Social Worker | Middletown, OH | 2019 |
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).