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.
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
- Caren Klein, LCSWClinical Social Worker1487719068
- Jennifer Klein, MDPediatrics Physician1932200755
- Karen Klein, LCSW-CMental Health Counselor1336283183
- Melvin Klein, PH.D.Psychologist1366683815
- Naomi Klein, NPPsychiatric/Mental Health Nurse Practitioner1033228143
- Sarah KleisBehavior Technician1053132688
- Bradley Klement, PA-CPhysician Assistant1053698266
- Brittany KlemmerBehavior Analyst1639725880
- Kristin KlewinCertified Registered Nurse Anesthetist1255632634
- Carrie Klik, BCABABehavior Analyst1982066916
- Michelle Klima, CRNPAdult Health Nurse Practitioner1457326225
- Josephine KlineBehavior Technician1093513855
- Ambyr Klink, CRPNPPediatric Nurse Practitioner1336563576
- Mary Klosek, LCSW-CClinical Social Worker1932423134
- Barak Klotzman, RBTBehavior Technician1710629548
- Sarah KlukoskyBehavior Technician1548054216
- Patricia Knapp, PH.D.Clinical Psychologist1265422190
- Lauren Knauff Stacey, PTAPhysical Therapy Assistant1154942951
- Deneice Knauss, RNRegistered Nurse1750716239
- Muriel Kneib, PA-CMedical Physician Assistant1609805837
- Racquel Knight, NBC-HWCHealth & Wellness Coach1407541311
- Taryn KnightBehavior Technician1881493286
- Brandi Knill, RNRegistered Nurse1811319122
- Rhonda Knotts, RNCase Management Registered Nurse1619276219
- John Knowlton, PT, DPTPhysical Therapist1316537566
- Mary KnoxRegistered Nurse1598142697
- Anastasia KochBehavior Analyst1063956266
- Rebecca KochRegistered Nurse1497237523
- Janet Koelsch, LCSW-CClinical Social Worker1417385253
- Christopher Koenig, M.A., BCBA, LBABehavior Analyst1215408265
- Marcie Koenig, LCSW-CClinical Social Worker1174261663
- Brian Kok, PHDClinical Psychologist1548871536
- Augusta Koker, FNP -BCFamily Nurse Practitioner1588136634
- Louis Kokkinakos, M.D.Obstetrics & Gynecology Physician1275550998
- Praise KolajoBehavior Technician1356224844
- Grace Kolawole, LGPCMental Health Counselor1952138364
- Ryan Kolb, PT, DPTPhysical Therapist1174191373
- Therese KolbBehavior Technician1336010909
- Omotanbaje Kole, DNPPsychiatric/Mental Health Nurse Practitioner1235977786
- Robert Kolodner, M.D.Psychiatry Physician1790875755
- Adetutu KomolafePharmacist1063060150
- Jie Kong, CRNP MSNFamily Nurse Practitioner1215040951
- Angela Kopack, MDInfectious Disease Physician1033253471
- Cassandra KoplowBehavior Technician1306511704
- Jan Koppelman, M.D.Pediatrics Physician1295700706
- James Kopper, M.DSpecialist1174590327
- Natasha Kormanik, MSN, FNP-BC, OCNFamily Nurse Practitioner1982330940
- Fatima KoromaBehavior Technician1134016652
- Poonum Korpe, MDInfectious Disease Physician1881853950
- Sophia Kosh, M.A.Professional Counselor1457545022
The largest Maryland cities
- Baltimore35,183
- Rockville14,353
- Bethesda7,245
- Silver Spring6,531
- Frederick3,981
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.