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 99 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
- Rudrajit Rai, MDGastroenterology Physician1346213824
- Juanita Rainaldi-Dvorak, RDHDental Hygienist1932618535
- Ryan RainesPhysical Therapy Assistant1235827734
- Zunera RaisBehavior Technician1467308924
- Rajini Raj, REGISTERED NURSERegistered Nurse1972913077
- Selvi Rajagopal, M.D.Internal Medicine Physician1578820478
- Neha Rajpal, MDGastroenterology Physician1902425838
- Zeshan Rajput, M.D.Internal Medicine Physician1548463268
- Rithesh RamSpeech-Language Pathologist1174340566
- Areej RamadanBehavior Technician1285351742
- Gaurav Raman, M.D.Internal Medicine Physician1609043389
- Karen Ramey, LCSW-CClinical Social Worker1164596631
- Elizabeth RamirezBehavior Technician1558075457
- Elvin RamirezBehavior Technician1144959479
- Erika RamirezBehavior Technician1457017626
- Meylyn Ramirez MartinezBehavior Technician1275333056
- Arlleen Ramirez OzunaBehavior Technician1144156944
- Maria Ramirez-ValenzuelaBehavior Technician1902606668
- Kathleen Ramkaran, R.N.Registered Nurse1326493511
- Michael RamosBehavior Technician1306685193
- Joseph RampollaBehavior Technician1265192025
- Hetal Rana, ODOptometrist1497865810
- Marquita Rand, PH.D.Speech-Language Pathologist1346319332
- Tajha RandallBehavior Technician1841034683
- Elizabeth Randolph, LGPCCounselor1669226221
- Sara Rankin, MDObstetrics & Gynecology Physician1790817252
- Duwayne RansomBehavior Technician1760148746
- Lane RansomBehavior Technician1770207359
- Janus Raphaelidis, BCBA, LBABehavior Analyst1073058467
- Amy RapnickiSpeech-Language Pathologist1124794631
- Emily RappBehavior Technician1316807142
- Harvey Rapp, PH. D.Clinical Psychologist1689686768
- Sandy Rappeport, MSWClinical Social Worker1811372311
- Venice RashfordRegistered Nurse1033456256
- Mohammed Rashid, MDEmergency Medicine Physician1376922468
- Alexander RatcliffBehavior Technician1912580283
- Davina RathBehavior Technician1952997454
- Tiffany Ratliff, RNRegistered Nurse1295253664
- Danielle RatzBehavior Technician1477127801
- Patricia Ravella, CRNP, PHDFamily Nurse Practitioner1700922572
- Sara Ravenscraft, FNP-BCFamily Nurse Practitioner1215670518
- Nishi Rawat, M.DCritical Care Medicine (Anesthesiology) Physician1336295575
- Kaitlin RawlingsBehavior Technician1003546268
- Norma Rawlings, NPLicensed Practical Nurse1659584811
- Courtney Ray, LCSW CSocial Worker1588709760
- J'Nya RayBehavior Technician1275464760
- William Rayfield, MDPediatrics Physician1518198357
- Christina RaymondRegistered Nurse1700298536
- Jennifer Rayne, RNRegistered Nurse1518453315
- Brett Raynor, PT, DPTPhysical Therapist1093698847
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.