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.
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
- Cameron ThomasBehavior Technician1982526414
- Clarissa Thomas, LGSWClinical Social Worker1467853416
- Courtney Thomas, LCPCProfessional Counselor1437441573
- Funmilola ThomasNurse's Aide1265229207
- Helena ThomasRegistered Nurse1184046492
- Iris Thomas, LCSW-CClinical Social Worker1124150115
- Jannel ThomasMarriage & Family Therapist1457944035
- Jerry Thomas, MDOrthopaedic Surgery Physician1720113251
- Mia ThomasBehavior Technician1083596522
- Mikell ThomasRegistered Nurse1043543481
- Stacy Thomas, BSN RNRegistered Nurse1639834310
- Tayonna ThomasBehavior Technician1093659328
- Vashti ThomasBehavior Technician1396393815
- William Thomas, M.D.Internal Medicine Physician1124185939
- Shanthi Thomas King, MDPediatrics Physician1891724381
- Yvonne Thomas-Wray, RNRegistered Nurse1346674223
- Pilar Thompkins, LCPCMental Health Counselor1720265986
- Amanda ThompsonSocial Worker1083365407
- Anne Thompson, C.N.MRegistered Nurse1912935636
- Denay ThompsonBehavior Technician1881426005
- Elizabeth Thompson, M.D.Pediatrics Physician1053679555
- Gisela ThompsonBehavior Technician1437943107
- Jean Thompson, D.C.Chiropractor1902019789
- Kara ThompsonRegistered Nurse1932872603
- Kathleen ThompsonRegistered Nurse1184035602
- Kelly ThompsonProfessional Counselor1912693011
- Kent Thompson, BCBABehavior Analyst1902572035
- Laila ThompsonBehavior Technician1750007647
- Rachel Thompson, PH.D.Clinical Psychologist1598027641
- Raven ThompsonBehavior Technician1528713567
- Rodrigo ThompsonBehavior Technician1104743475
- Johndesha Thompson-BellBehavior Technician1912577842
- Simone ThorneBehavior Technician1861275463
- Laurie Thorner, LCSW-CClinical Social Worker1497008569
- Jason ThorntonBehavior Technician1013899178
- Zakiya ThorntonBehavior Technician1174476352
- Carolyn ThorpeMental Health Counselor1003769696
- Judy Thorpe, PT, DPTPhysical Therapist1093966780
- Yahmia ThrailkillBehavior Technician1720877624
- Desiree ThurmanBehavior Technician1740074301
- Anne ThurstonRegistered Nurse1821494899
- Par TialSocial Worker1689410375
- Alexander Tice, PSY.D.Clinical Psychologist1649542473
- Kate Tiebosch, RN , BSNRegistered Nurse1992228407
- Casey TiefenwerthSocial Worker1861902785
- Oluwakemi TifaseBehavior Technician1891509774
- Madison TignallBehavior Analyst1003313602
- April Tignor, M.D.Gastroenterology Physician1598797029
- Olivia Tijerina, M.S.C.C.C.Speech-Language Pathologist1346373552
- Rebecca Tillemans, MS LCPCMental Health Counselor1952742124
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.