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 65 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. Caren Klein, LCSWClinical Social Worker1487719068
  2. Jennifer Klein, MDPediatrics Physician1932200755
  3. Karen Klein, LCSW-CMental Health Counselor1336283183
  4. Melvin Klein, PH.D.Psychologist1366683815
  5. Naomi Klein, NPPsychiatric/Mental Health Nurse Practitioner1033228143
  6. Sarah KleisBehavior Technician1053132688
  7. Bradley Klement, PA-CPhysician Assistant1053698266
  8. Brittany KlemmerBehavior Analyst1639725880
  9. Kristin KlewinCertified Registered Nurse Anesthetist1255632634
  10. Carrie Klik, BCABABehavior Analyst1982066916
  11. Michelle Klima, CRNPAdult Health Nurse Practitioner1457326225
  12. Josephine KlineBehavior Technician1093513855
  13. Ambyr Klink, CRPNPPediatric Nurse Practitioner1336563576
  14. Mary Klosek, LCSW-CClinical Social Worker1932423134
  15. Barak Klotzman, RBTBehavior Technician1710629548
  16. Sarah KlukoskyBehavior Technician1548054216
  17. Patricia Knapp, PH.D.Clinical Psychologist1265422190
  18. Lauren Knauff Stacey, PTAPhysical Therapy Assistant1154942951
  19. Deneice Knauss, RNRegistered Nurse1750716239
  20. Muriel Kneib, PA-CMedical Physician Assistant1609805837
  21. Racquel Knight, NBC-HWCHealth & Wellness Coach1407541311
  22. Taryn KnightBehavior Technician1881493286
  23. Brandi Knill, RNRegistered Nurse1811319122
  24. Rhonda Knotts, RNCase Management Registered Nurse1619276219
  25. John Knowlton, PT, DPTPhysical Therapist1316537566
  26. Mary KnoxRegistered Nurse1598142697
  27. Anastasia KochBehavior Analyst1063956266
  28. Rebecca KochRegistered Nurse1497237523
  29. Janet Koelsch, LCSW-CClinical Social Worker1417385253
  30. Christopher Koenig, M.A., BCBA, LBABehavior Analyst1215408265
  31. Marcie Koenig, LCSW-CClinical Social Worker1174261663
  32. Brian Kok, PHDClinical Psychologist1548871536
  33. Augusta Koker, FNP -BCFamily Nurse Practitioner1588136634
  34. Louis Kokkinakos, M.D.Obstetrics & Gynecology Physician1275550998
  35. Praise KolajoBehavior Technician1356224844
  36. Grace Kolawole, LGPCMental Health Counselor1952138364
  37. Ryan Kolb, PT, DPTPhysical Therapist1174191373
  38. Therese KolbBehavior Technician1336010909
  39. Omotanbaje Kole, DNPPsychiatric/Mental Health Nurse Practitioner1235977786
  40. Robert Kolodner, M.D.Psychiatry Physician1790875755
  41. Adetutu KomolafePharmacist1063060150
  42. Jie Kong, CRNP MSNFamily Nurse Practitioner1215040951
  43. Angela Kopack, MDInfectious Disease Physician1033253471
  44. Cassandra KoplowBehavior Technician1306511704
  45. Jan Koppelman, M.D.Pediatrics Physician1295700706
  46. James Kopper, M.DSpecialist1174590327
  47. Natasha Kormanik, MSN, FNP-BC, OCNFamily Nurse Practitioner1982330940
  48. Fatima KoromaBehavior Technician1134016652
  49. Poonum Korpe, MDInfectious Disease Physician1881853950
  50. Sophia Kosh, M.A.Professional Counselor1457545022

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.