NPPES file of Aug 9, 2026

Doctors and health care providers in Washington, DC

45,857 individual NPPES records list a practice address in Washington, 1st of 4 District of Columbia cities. The largest group is home health aide: 8,945, 20% of the city's records, against 20% across District of Columbia. Page 622 of 918.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Washington

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Washington in District of Columbia

  • Rank in District of Columbia1st of 4 cities by records
  • Share of the state99.2% of District of Columbia's records
  • Specialties present25 or more taxonomy codes
  • Top three groups39.8% of all records
  • Home Health Aide rank1st of the 10 District of Columbia cities with the most

Providers in Washington, alphabetically

  1. Esther ObiohaCase Manager/Care Coordinator1417784505
  2. Felix ObiohaCase Manager/Care Coordinator1194552281
  3. Lotanna Obiora, M.D.Anesthesiology Physician1285084681
  4. Foluso Obisanya, MBBCHStudent in an Organized Health Care Education/Training Program1346184546
  5. Olalekan ObisanyaCase Manager/Care Coordinator1225716608
  6. Odunayo Obisesan, PHARM.D, CGPPharmacist1265641971
  7. Thomas Obisesan, MDGeriatric Medicine (Internal Medicine) Physician1295894426
  8. Gregory Obiwuma, PMHNPPsychiatric/Mental Health Nurse Practitioner1164052692
  9. Joe ObiwuruHome Health Aide1134480072
  10. Kingsley ObiwuruHome Health Aide1588927560
  11. Maureen ObiwuruHome Health Aide1316506462
  12. Delasi ObobiCase Manager/Care Coordinator1184426363
  13. Anita Obodo, MDStudent in an Organized Health Care Education/Training Program1801582556
  14. Rachel ObohHome Health Aide1851652465
  15. Regina OboiteCase Manager/Care Coordinator1841987310
  16. Stephanie Oboite, DDSDentist1528578481
  17. Ella ObonyanoHome Health Aide1528318649
  18. Hector ObregonMental Health Counselor1023899473
  19. Aleesha Obrien, M. E.DMental Health Counselor1528717279
  20. Michelle Obrien, LGPCProfessional Counselor1376039925
  21. Nicole ObrienClinical Social Worker1972480754
  22. Chinwe Obudulu, RDRegistered Dietitian1295367670
  23. Dolapo ObukowhoCase Manager/Care Coordinator1346939071
  24. Thomas ObutuHome Health Aide1336406560
  25. Luis Ocampo ZarzaMental Health Counselor1851097901
  26. Christopher OcanseyHome Health Aide1891065769
  27. Grace OcheRegistered Nurse1992498935
  28. Margaret OcheHome Health Aide1609441765
  29. Onyee OcheLicensed Vocational Nurse1235519547
  30. Virginia OchiHome Health Aide1255793410
  31. Alice OchiengCase Manager/Care Coordinator1598464323
  32. Aisha OchoaHome Health Aide1942561550
  33. Meylin OchoaCase Manager/Care Coordinator1114640315
  34. Paulina Ochoa, MPTOrthopedic Physical Therapist1922131044
  35. Amy OcholaGerontology Occupational Therapist1538947007
  36. Evelyn OchulorNurse's Aide1902636913
  37. Grace OchulorRegistered Nurse1043072200
  38. Eunice Ochuonyo, NURSE PRACTITIONERFamily Nurse Practitioner1669914933
  39. Katie Ochwat, RDRegistered Dietitian1598350571
  40. Christian Ockenhouse, M.D.Infectious Disease Physician1639233851
  41. Karen Oconnell, MDPediatric Emergency Medicine (Pediatrics) Physician1699846055
  42. Christine Oconnor, PH.D., LCSWClinical Social Worker1780884411
  43. Kevin Oconnor, DOFamily Medicine Physician1740235340
  44. Tawnne Oconnor, FNPFamily Nurse Practitioner1619511565
  45. Tessie October, M.D.Pediatric Critical Care Medicine Physician1346329794
  46. Jay Ocuin, MDNephrology Physician1841286689
  47. Aster OdaHome Health Aide1508121443
  48. Hana OdaHome Health Aide1629892104
  49. Zenash OdaHome Health Aide1134480825
  50. Carlian Odae, LICSWClinical Social Worker1972296911

The largest District of Columbia cities

  1. Ne149
  2. Washington Dc147
  3. Bolling Afb74

All of District of Columbia →

How to read this directory

Washington, District of Columbia appears in the CMS National Plan and Provider Enumeration System with 45,857 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Washington - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Washington practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Washington is weighted toward Home Health Aide (8,945 clinicians, followed by Personal Care Attendant with 5,624 and Case Manager/Care Coordinator with 3,669). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to District of Columbia's population, Washington reports roughly 6753.9 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

For Washington patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Washington, DC?

There are 45,857 registered healthcare providers in Washington, DC, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Washington?

The most common specialties in Washington are Home Health Aide, Personal Care Attendant, Case Manager/Care Coordinator, Student in an Organized Health Care Education/Training Program, Clinical Social Worker. Home Health Aide has the most providers with 8,945.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.