NPPES file of Aug 9, 2026

Doctors and health care providers in Columbia, MD

6,690 individual NPPES records list a practice address in Columbia, 4th of 284 Maryland cities. The largest group is behavior technician: 2,034, 30% of the city's records, against 16% across Maryland. Page 126 of 134.

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

The 8 largest groups in Columbia

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

Columbia in Maryland

  • Rank in Maryland4th of 284 cities by records
  • Share of the state4.2% of Maryland's records
  • Specialties present25 or more taxonomy codes
  • Top three groups47.3% of all records
  • Behavior Technician rank3rd of the 10 Maryland cities with the most

Compared with Maryland as a whole, Columbia has 7.6× the state's share of registered nurse records and 0.47× its share of occupational therapist records.

Providers in Columbia, alphabetically

  1. Jacqueline Wallace, PHYSICIANObstetrics & Gynecology Physician1912945155
  2. Jonelle Wallace, APRN, NP-CNurse Practitioner1417642364
  3. Kaelah WallaceBehavior Technician1043966773
  4. Seanquile WallaceBehavior Technician1194505768
  5. Paula Waller, LCSW-CClinical Social Worker1427103720
  6. Janeen WallopBehavior Technician1679456313
  7. Elizabeth Walls, CRNACertified Registered Nurse Anesthetist1003883737
  8. Carly WalshBehavior Technician1346037991
  9. Sheila WalshRegistered Nurse1255825329
  10. Olivia Walter, BCBABehavior Analyst1831785898
  11. Katherine WaltermeyerBehavior Technician1023931607
  12. Dianne WaltersFamily Medicine Physician1841991973
  13. Kondi Walters-Smith, CRNPFamily Nurse Practitioner1780190595
  14. Christina Walther, RBTBehavior Technician1588173462
  15. Sophia WanBehavior Technician1174254346
  16. Alice Wang, D.M.D., M.S.Orthodontics and Dentofacial Orthopedics Dentistry1588892186
  17. Margaret Wang, M.D.Internal Medicine Physician1154612075
  18. Mingxiang Wang, PHARMDPharmacist1578962239
  19. Pamela Wang, LGPCProfessional Counselor1811555824
  20. Veronica Wang, MDPediatrics Physician1639632052
  21. Yibei Wang, PHARMDPharmacist1902322571
  22. Zheng-Pin Wang, MDAcupuncturist1669894697
  23. Allison WardObstetrics & Gynecology Physician1700414604
  24. Francisco Ward, DOInterventional Pain Medicine Physician1245225226
  25. Phatteous WardBehavior Technician1730950023
  26. Jonene WarderOccupational Therapist1194121970
  27. Racquel WareBehavior Technician1881886778
  28. Catherine WarfieldRegistered Nurse1255721999
  29. Jessica WarfieldBehavior Technician1669329256
  30. Kaitlyn WarnerOccupational Therapist1306524954
  31. Conor WarrenBehavior Technician1578163978
  32. Elizabeth WarrenBehavior Technician1003751769
  33. Joseph Warren, LCSW-CClinical Social Worker1700241114
  34. Nerissa Warren, MOTR/L CPAMOccupational Therapist1134504830
  35. Sarah WarrenBehavior Technician1538757109
  36. Evan WarthenBehavior Technician1649159856
  37. Cierra Washington, RMPMassage Therapist1972356269
  38. Daphne Washington, PH.D.,LCPC,NCC,DCCProfessional Counselor1063663870
  39. Jennifer WashingtonFamily Nurse Practitioner1477286110
  40. Makiyah WashingtonBehavior Technician1821939729
  41. Shantale Washington, FNPNurse Practitioner1841036761
  42. Steven WashingtonBehavior Technician1720828510
  43. Jennifer WasmusRegistered Nurse1376936278
  44. Janis Wasser, M.A., MBASpeech-Language Pathologist1114266509
  45. Charlene WatersAddiction (Substance Use Disorder) Counselor1881820801
  46. Katharine WatersOccupational Therapist1316413362
  47. Marlena Waters BordleyBehavior Technician1699431676
  48. Javonte WatfordBehavior Technician1306660931
  49. Aenilah WatkinsBehavior Technician1003677345
  50. Asia WatkinsMental Health Counselor1568196756

The largest Maryland cities

  1. Baltimore35,183
  2. Rockville14,353
  3. Bethesda7,245
  4. Silver Spring6,531
  5. Frederick3,981

All of Maryland →

How to read this directory

Columbia, Maryland appears in the CMS National Plan and Provider Enumeration System with 6,690 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 Columbia - 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 Columbia 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 Columbia is weighted toward Behavior Technician (2,034 clinicians, followed by Registered Nurse with 783 and Clinical Social Worker with 346). 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, Columbia reports roughly 108.2 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 Columbia practice address, a coverage gap Columbia patients typically fill by traveling to a larger nearby hub.

For Columbia 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 Columbia, MD?

There are 6,690 registered healthcare providers in Columbia, MD, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Columbia?

The most common specialties in Columbia are Behavior Technician, Registered Nurse, Clinical Social Worker, Behavior Analyst, Physical Therapist. Behavior Technician has the most providers with 2,034.

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.