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 397 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. Rosalyn Marcus, R.N.Registered Nurse1326373036
  2. Tae Mardanov, CRNPNeonatal Nurse Practitioner1851066211
  3. Talaat Mardelli, MDCardiovascular Disease Physician1134297716
  4. Darren Mareiniss, M.D.Emergency Medicine Physician1689813909
  5. Andrew Marek, M.D.Dermatology Physician1508399213
  6. Patricia MarekSpeech-Language Pathologist1841900222
  7. Tonja Marell-Bell, DNP, MSN, RNCommunity Health Registered Nurse1851266191
  8. Adam MargalitOrthopaedic Surgery Physician1659808467
  9. Abdullah Marghalani, DDSPediatric Dentistry1598212565
  10. Megan MargiottaNeurology Physician1063831493
  11. Asa Margolis, DO, MPH, MSEmergency Medicine Physician1184949950
  12. Jami Margolis, LCPCClinical Psychologist1679118384
  13. Kenneth Margolis, M.D.Gastroenterology Physician1700826930
  14. Maiya MargolisPhysician Assistant1750252250
  15. Russell Margolis, M.D.Psychiatry Physician1093741944
  16. Georgios Antonios Margonis, MD, PHDSurgery Physician1003378498
  17. Markus Margreiter, M.D.Specialist1013195494
  18. Katherine Margulis, MS, CF-SLPSpeech-Language Pathologist1396216743
  19. Alicia Marhefka, M.D.Psychiatry Physician1588197172
  20. Aurora Maria, PA-CPhysician Assistant1073957353
  21. Ernesto MarinStudent in an Organized Health Care Education/Training Program1477415636
  22. Karen MarinSpeech-Language Assistant1669289831
  23. Joseph Marine, M.D.Clinical Cardiac Electrophysiology Physician1902848278
  24. Stella Marine, BSN, MPARegistered Nurse1962379941
  25. Frank MarinelliPharmacist1164737730
  26. Jason MarinelliStudent in an Organized Health Care Education/Training Program1851230197
  27. Andrew MarinichSurgical Physician Assistant1407554066
  28. Ivy MarinoRehabilitation Counselor1144191008
  29. Loren Marino, MDStudent in an Organized Health Care Education/Training Program1205784501
  30. Rachel Marino, CRNPAcute Care Nurse Practitioner1194982090
  31. Victoria MarinzelClinical Social Worker1356186100
  32. Alexander MarkSurgical Technologist1689947962
  33. Bernadette Mark, LGSWSocial Worker1528292448
  34. Katrina Mark, MDObstetrics & Gynecology Physician1508025313
  35. Kevin Mark, DPTPhysical Therapist1720413784
  36. Lynette Mark, M.D.Anesthesiology Physician1003851866
  37. Tammy Mark, P.T.Physical Therapist1720200314
  38. Udeme MarkPsychiatric/Mental Health Nurse Practitioner1528945961
  39. Uma Markan, MDStudent in an Organized Health Care Education/Training Program1376246660
  40. Michael Markas, MDAnesthesiology Physician1710974373
  41. Toni MarkenOccupational Therapy Assistant1942520317
  42. Susan Marker, MA, CAS, NCSP, LBA,School Psychologist1508682519
  43. Valerie Markey, M.S., CCC-SLPSpeech-Language Pathologist1215591029
  44. Richard Markham, M.D.Infectious Disease Physician1639327356
  45. Janina MarkidanStudent in an Organized Health Care Education/Training Program1215490586
  46. Lauren Markle, MS, OTR/LPediatric Occupational Therapist1942546288
  47. Brette MarkleyBehavior Technician1619867652
  48. Julia MarkleyPhysician Assistant1376489393
  49. Denise Markoff, D.D.S., F.A.G.D.General Practice Dentistry1326167164
  50. Karen Markovic, P.A.Physician Assistant1699744292

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.