NPPES file of Aug 9, 2026

Doctors and health care providers in Baltimore, MD

35,183 individual NPPES records list a practice address in Baltimore, 1st of 284 Maryland cities. The largest group is students in training: 4,028, 11% of the city's records, against 4% across Maryland. Page 398 of 704.

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

The 8 largest groups in Baltimore

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

Baltimore in Maryland

  • Rank in Maryland1st of 284 cities by records
  • Share of the state22.1% of Maryland's records
  • Specialties present25 or more taxonomy codes
  • Top three groups27.1% of all records
  • Students in training rank1st of the 10 Maryland cities with the most

Compared with Maryland as a whole, Baltimore has 3.2× the state's share of student in an organized health care education/training program records and 0.64× its share of professional counselor records.

Providers in Baltimore, alphabetically

  1. Jennifer Markowitz, MA CCC-SLPSpeech-Language Pathologist1396023149
  2. Leah MarkowitzOccupational Therapist1518386317
  3. Moshe Markowitz, LCSW-C, LCADCClinical Social Worker1669957890
  4. Rivka Markowitz, OTR/LOccupational Therapist1427503929
  5. Jeanne Markowski, C.R.N.P.Nurse Practitioner1447219043
  6. Mark Markowski, M.D., PH.D.Hematology & Oncology Physician1689809188
  7. Deborah Marks, MSW, LCSW-CClinical Social Worker1205910411
  8. Jane Marks, MS, RNRegistered Nurse1407728645
  9. Jeanne Marks, LCSW-CClinical Social Worker1376985945
  10. Lauren Marks, LCSW-CSocial Worker1588135677
  11. Madeline Marks, PH.D.Psychologist1457972556
  12. Naomi MarksSpeech-Language Pathologist1255803797
  13. William MarksSocial Worker1962363408
  14. Barbara Marley, LCSW-CClinical Social Worker1528117496
  15. Kristen MarllCertified Registered Nurse Anesthetist1003273400
  16. Suzanna Marlow, M.S., CCC-SLPSpeech-Language Pathologist1992535710
  17. Andrea Marlowe, M.A., CCC-AAudiologist1053452284
  18. Claire Marmen, PTPhysical Therapist1891816963
  19. Meghan Marmillion, MDHospitalist Physician1427347699
  20. Catherine Marner, LCPCProfessional Counselor1518524305
  21. Michael Marohn, D.O.Surgery Physician1780620062
  22. Angelina MaronePsychiatric/Mental Health Nurse Practitioner1023801834
  23. Nathan MaroneyBehavior Technician1821621194
  24. Christopher Maroun, MDOtolaryngology Physician1619505815
  25. Natalie MarowskiRegistered Nurse1730019365
  26. Celendonia Myrna Marquez, FNP-CFamily Nurse Practitioner1417726241
  27. Esteban Marquez, MDInternal Medicine Physician1851352819
  28. Michael Marquez, PSY.D.Mental Health Counselor1699327221
  29. Mirna MarquezBehavior Technician1952177768
  30. Yoneida Marquez-VigilBehavior Technician1427794031
  31. Leticia Marquina-Santos, LMSWSocial Worker1801553037
  32. Kaitlin Marquis, MDDiagnostic Radiology Physician1700316585
  33. Bonnie Marr, M.D.Hospice and Palliative Medicine (Emergency Medicine) Physician1295055010
  34. John Marra, M.D.Cardiovascular Disease Physician1437128592
  35. Dina Marrakchi El FellahClinical Social Worker1164217121
  36. Joel Marrero-Sanchez, PHRAMDPharmacist1518857598
  37. Shannon Marriott, PA-CPhysician Assistant1477693448
  38. Myrna Marron, MDStudent in an Organized Health Care Education/Training Program1528196839
  39. Kristen Marrone, M.D.Internal Medicine Physician1780973271
  40. Sarah Marrone, MDEmergency Medicine Physician1740453646
  41. Jaquelin Marroquin-ZamoraBehavior Technician1407742547
  42. Brittany Marrs, PHARM.D.Pharmacist1720456882
  43. Margaret MarsOccupational Therapy Assistant1093032039
  44. Rebecca Marsden, CRNPAdult Health Nurse Practitioner1528085107
  45. Devin MarsellaPhysical Therapist1033765037
  46. Elisabeth Marsh, M.D.Neurology Physician1942412911
  47. Ian Marsh, PHDStudent in an Organized Health Care Education/Training Program1346909488
  48. Bruce Marshall, M.D.Internal Medicine Physician1104862127
  49. Catherine Marshall, MDMedical Oncology Physician1134443948
  50. Daniel Marshall, MS ED, BCBABehavior Analyst1699195131

The largest Maryland cities

  1. Rockville14,353
  2. Bethesda7,245
  3. Columbia6,690
  4. Silver Spring6,531
  5. Frederick3,981

All of Maryland →

How to read this directory

Baltimore, Maryland appears in the CMS National Plan and Provider Enumeration System with 35,183 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 Baltimore - 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 Baltimore 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 Baltimore is weighted toward Student in an Organized Health Care Education/Training Program (4,028 clinicians, followed by Behavior Technician with 3,602 and Clinical Social Worker with 1,917). 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 Maryland's population, Baltimore reports roughly 569.3 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.

Of Maryland's most common specialties, Home Health Aide is the most prominent one with no provider currently listing a Baltimore practice address, a coverage gap Baltimore patients typically fill by traveling to a larger nearby hub.

For Baltimore 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 Baltimore, MD?

There are 35,183 registered healthcare providers in Baltimore, MD, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Baltimore?

The most common specialties in Baltimore are Student in an Organized Health Care Education/Training Program, Behavior Technician, Clinical Social Worker, Internal Medicine Physician, Physician Assistant. Student in an Organized Health Care Education/Training Program has the most providers with 4,028.

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.