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 120 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. Cameron ThomasBehavior Technician1982526414
  2. Clarissa Thomas, LGSWClinical Social Worker1467853416
  3. Courtney Thomas, LCPCProfessional Counselor1437441573
  4. Funmilola ThomasNurse's Aide1265229207
  5. Helena ThomasRegistered Nurse1184046492
  6. Iris Thomas, LCSW-CClinical Social Worker1124150115
  7. Jannel ThomasMarriage & Family Therapist1457944035
  8. Jerry Thomas, MDOrthopaedic Surgery Physician1720113251
  9. Mia ThomasBehavior Technician1083596522
  10. Mikell ThomasRegistered Nurse1043543481
  11. Stacy Thomas, BSN RNRegistered Nurse1639834310
  12. Tayonna ThomasBehavior Technician1093659328
  13. Vashti ThomasBehavior Technician1396393815
  14. William Thomas, M.D.Internal Medicine Physician1124185939
  15. Shanthi Thomas King, MDPediatrics Physician1891724381
  16. Yvonne Thomas-Wray, RNRegistered Nurse1346674223
  17. Pilar Thompkins, LCPCMental Health Counselor1720265986
  18. Amanda ThompsonSocial Worker1083365407
  19. Anne Thompson, C.N.MRegistered Nurse1912935636
  20. Denay ThompsonBehavior Technician1881426005
  21. Elizabeth Thompson, M.D.Pediatrics Physician1053679555
  22. Gisela ThompsonBehavior Technician1437943107
  23. Jean Thompson, D.C.Chiropractor1902019789
  24. Kara ThompsonRegistered Nurse1932872603
  25. Kathleen ThompsonRegistered Nurse1184035602
  26. Kelly ThompsonProfessional Counselor1912693011
  27. Kent Thompson, BCBABehavior Analyst1902572035
  28. Laila ThompsonBehavior Technician1750007647
  29. Rachel Thompson, PH.D.Clinical Psychologist1598027641
  30. Raven ThompsonBehavior Technician1528713567
  31. Rodrigo ThompsonBehavior Technician1104743475
  32. Johndesha Thompson-BellBehavior Technician1912577842
  33. Simone ThorneBehavior Technician1861275463
  34. Laurie Thorner, LCSW-CClinical Social Worker1497008569
  35. Jason ThorntonBehavior Technician1013899178
  36. Zakiya ThorntonBehavior Technician1174476352
  37. Carolyn ThorpeMental Health Counselor1003769696
  38. Judy Thorpe, PT, DPTPhysical Therapist1093966780
  39. Yahmia ThrailkillBehavior Technician1720877624
  40. Desiree ThurmanBehavior Technician1740074301
  41. Anne ThurstonRegistered Nurse1821494899
  42. Par TialSocial Worker1689410375
  43. Alexander Tice, PSY.D.Clinical Psychologist1649542473
  44. Kate Tiebosch, RN , BSNRegistered Nurse1992228407
  45. Casey TiefenwerthSocial Worker1861902785
  46. Oluwakemi TifaseBehavior Technician1891509774
  47. Madison TignallBehavior Analyst1003313602
  48. April Tignor, M.D.Gastroenterology Physician1598797029
  49. Olivia Tijerina, M.S.C.C.C.Speech-Language Pathologist1346373552
  50. Rebecca Tillemans, MS LCPCMental Health Counselor1952742124

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.