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 47 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
- Mary Green, RN, IBCLCRegistered Nurse1457971277
- Maya Green, MSOTR/LOccupational Therapist1306317664
- Maya GreenBehavior Technician1023941556
- Nhamiyia GreenBehavior Technician1871274886
- Maxina Greenberg, DDSGeneral Practice Dentistry1407214117
- Brett Greenberger, M.D.Psychiatry Physician1073591558
- Emily Greenberger, LCSW-CClinical Social Worker1750655783
- Shayna GreenblattSocial Worker1720629256
- Briana GreeneBehavior Technician1588328447
- Terra Greene, MSN, RNRegistered Nurse1154768356
- Sade Greenfield, PHARM.D, RPHPharmacist1447173075
- Cyan GreenhillBehavior Technician1083391288
- Sharon Greenidge, LCSW-CClinical Social Worker1194116152
- Sarah GreeningBehavior Technician1912712357
- Lindiwe Greenwood, MDFamily Medicine Physician1932147881
- Maria Gregory, PA-CPhysician Assistant1669440210
- George Greidinger, M.D.General Practice Physician1548594617
- Mark Greiner, L.AC.Acupuncturist1295366839
- Jill Grempler, LCSW-CClinical Social Worker1407360365
- Gabriella GreshamBehavior Technician1295543494
- Judith Greth, PTPhysical Therapist1518193143
- Desirae GreyBehavior Technician1700769205
- Kaydence GrierBehavior Technician1881543403
- Alexandria Griffin, BSN, RNRegistered Nurse1073270401
- James Griffin, MDInternal Medicine Physician1649373150
- Leah Griffin, PA-CPhysician Assistant1922679752
- Patricia GriffinRegistered Nurse1821400524
- Shakeya GriffinBehavior Technician1831925197
- Twyla GriffinRegistered Nurse1518373885
- Daneeka Griffin-BeyHome Health Registered Nurse1952053670
- Haley GriffithBehavior Technician1417846882
- Jennifer Griffith, RNRegistered Nurse1619456993
- Kirk Griffith, PH.D.Clinical Neuropsychologist1609101716
- Daniel GriggsRegistered Nurse1780099101
- Inna GrigoryevaMassage Therapist1790621472
- Lori Grimes, MAC,LAC,MBAAcupuncturist1033494760
- Madelyn Grinc, CRNPNurse Practitioner1881933182
- Alexandra Grobicki, M.S., LCMFTMarriage & Family Therapist1952573271
- Dechei GroceBehavior Technician1134866080
- Madison GrociaBehavior Technician1043959976
- George Groman, MDSpecialist1255308201
- Samantha Gronau, M.A.Behavior Technician1891459194
- Barbara GroseNutritionist1336412394
- Alison GrossOccupational Therapist1871422535
- Kaa'Liyah GrossBehavior Technician1427842426
- Lindsay GrossRegistered Nurse1336914621
- Melissa GrossDental Hygienist1558136937
- Paula Grossman, RNRegistered Nurse1114412871
- Kathryn GrossmeyerRegistered Nurse1578966354
- Lev Grotel, LCSW-CClinical Social Worker1750787602
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.