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 510 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. Alicia MarcinkoSpeech-Language Pathologist1508796418
  2. Anne Marcinkowski, MDStudent in an Organized Health Care Education/Training Program1750078986
  3. Bridget Marcinkowski, MDStudent in an Organized Health Care Education/Training Program1902594336
  4. Elizabeth Marcinkus, AU.D., CCC-AAudiologist-Hearing Aid Fitter1780805754
  5. Salome MarcoHome Health Aide1528634987
  6. George MarcosPharmacist1477156909
  7. David Marcozzi, M.D., MHS-CLEmergency Medicine Physician1154405033
  8. Rachel Marcroft, DPTPhysical Therapist1447141908
  9. Crystal Marcus, M.A.Counselor1356715833
  10. Janet Marcus, APRN, BCAdult Psychiatric/Mental Health Registered Nurse1548474497
  11. Jeremy Marcus, M.D.Nephrology Physician1528175114
  12. Mia Marcus, M.D.Internal Medicine Physician1619933025
  13. Tandica MarcusHome Health Aide1518221720
  14. John MarczykStudent in an Organized Health Care Education/Training Program1548014848
  15. Daniel Marder, M.D.Specialist1780635615
  16. Christina Marea, CNMAdvanced Practice Midwife1639483605
  17. Martha MarealleHome Health Aide1255675989
  18. Annette Marecheau, PHARMACISTPharmacist1487259602
  19. Susan Mareck, PHDClinical Psychologist1932219904
  20. Dorothy Marette, PSY.D.Clinical Psychologist1881717114
  21. Joanna Mareuil, CPNP-PCPediatric Nurse Practitioner1689222333
  22. Shelley Marfori, PSY.D.Psychologist1649982687
  23. Mongidor MargaretHome Health Aide1518630227
  24. Catherine Margeton, LGSWSocial Worker1043488190
  25. Robert Margie, MDInternal Medicine Physician1013020577
  26. Raia Margo, PH.D.Psychologist1114299062
  27. Avi-David Margolies, PSY.D.Clinical Psychologist1528523446
  28. Cynthia Margolies, PH.D.Clinical Psychologist1598842718
  29. Richard Margolies, PH.D.Clinical Psychologist1942528732
  30. Marc Margolis, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1295771525
  31. Rachel Margolis, PHD, LICSWClinical Social Worker1720798887
  32. Gloribel Maria De FloresPersonal Care Attendant1922743939
  33. Aida MarijaniCommunity Health Worker1629772751
  34. Hakeem MarijaniCase Manager/Care Coordinator1336844018
  35. Barbara Marin, PH.D.Addiction (Substance Use Disorder) Counselor1700941689
  36. Christopher MarinBehavior Technician1124748041
  37. Raul Marin, MDPhysical Medicine & Rehabilitation Physician1700838521
  38. Ruth Marin, M.S.Audiologist1083947931
  39. Akud MarinaCase Manager/Care Coordinator1538621008
  40. Grace MarinaroCritical Care Medicine Registered Nurse1790610111
  41. Joyce Maring, PTPediatric Physical Therapist1730404203
  42. Nicholas Marinkovich, M.D.Student in an Organized Health Care Education/Training Program1942568225
  43. Gustavo Marino, M.D.Gastroenterology Physician1730272956
  44. Philip Marion, MDPhysical Medicine & Rehabilitation Physician1780693598
  45. Nura Mariscal Del Moral, PT, DPTPhysical Therapist1285394486
  46. Anthony Mark, M.D.Surgery Physician1629128947
  47. Robert Mark, RPHPharmacist1174841993
  48. Saralyn Mark, MDInternal Medicine Physician1427364256
  49. Princess Mark-Adjeli, M.D.Medical Oncology Physician1104351527
  50. Mary Markarian-BarrettCertified Registered Nurse Anesthetist1528056041

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.