2026 data CMS NPPES NUCC Taxonomy

Doctors in Frederick, MD

Compiled from official public sources by the PlainDoctor editorial team.

Active healthcare providers in Frederick sourced from the CMS NPPES weekly file, no proprietary ratings, no editorial scores. NPI counts, specialty distribution, and primary practice addresses refreshed each release.

3,850
Providers
CMS NPPES-registered
20
Specialties
NUCC taxonomy codes
Behavior Technician
Top specialty
368 providers
Maryland
State
MD

3,850 healthcare providers across 20 specialties

Frederick, Maryland appears in the CMS National Plan and Provider Enumeration System with 3,850 registered healthcare providers spanning 20 distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Frederick - 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 Frederick 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 2023 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Frederick is weighted toward Behavior Technician (368 clinicians, followed by Clinical Social Worker with 319 and Physical Therapist with 238). 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, Frederick reports roughly 62.3 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.

Within Maryland, Frederick ranks #6 of 280 cities tracked by provider count, accounting for 2.5% of the state's registered providers. Of Maryland's most common specialties, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Frederick practice address, a coverage gap Frederick patients typically fill by traveling to a larger nearby hub.

For Frederick patients, this directory is most useful as a starting shortlist, searching by specialty narrows the 690-taxonomy roster to clinicians with the relevant training, and each provider page links to NPI, state licensing boards, and the NPPES registry for credential verification. 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, so listing details may be out of date; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients. Nothing on this page substitutes for consulting a licensed clinician about your personal health decisions.

3,850
Providers
20
Specialties
#6
of 280 MD cities
2.5%
of MD providers
62.3
Per 100K (state)

Which specialties are most common in Frederick

Behavior Technician 368
Clinical Social Worker 319
Physical Therapist 238
Mental Health Counselor 183
Professional Counselor 176
Social Worker 147
Family Nurse Practitioner 139
Pharmacist 136
Speech-Language Pathologist 133
Occupational Therapist 104
Physician Assistant 95
Internal Medicine Physician 75
Family Medicine Physician 63
General Practice Dentistry 61
Psychiatric/Mental Health Nurse Practitioner 58
Registered Nurse 50
Dentist 49
Physical Therapy Assistant 46
Behavior Analyst 45
Pediatrics Physician 43

Healthcare Providers (Page 51)

Name
Patricia O Brien, PT
Physical Therapist
John O'Brien, LCSW-C
Clinical Social Worker
Brian O'Connor, MD
Hematology & Oncology Physician
Megan O'Connor
Speech-Language Pathologist
Nancy O'Donnell, PT
Physical Therapist
Celia O'Fallon
Speech-Language Pathologist
Jane O'Keefe
Behavior Technician
Kelli O'Neal, PA-C
Physician Assistant
Teri O'Neil, MSN,FNP
Family Nurse Practitioner
Avery O'Neill
Behavior Technician
James O'Neill, LCPC
Mental Health Counselor
Erin O'Toole, LCPC
Professional Counselor
Catherine Oakley
Physician Assistant
Olivia Oates, LGPC
Professional Counselor
Frank Oben Nguembou
Emergency Registered Nurse
Mary Obenland, OTR/L
Occupational Therapist
James Oberman, M.D.
Otolaryngology Physician
Margaret Oberman, M.D.
Internal Medicine Physician
Amarachi Obi, MD
Obstetrics & Gynecology Physician
Francisca Obodo
Psychiatric/Mental Health Nurse Practitioner
Diane Ochalek, LCSW-C
Clinical Social Worker
Beatrice Ochieng, MS, LCPC
Professional Counselor
Rachel Oddoye, LMSW
Mental Health Counselor
Elizabeth Odom, LCSW-C
Clinical Social Worker
Jacinta Oduro
Family Nurse Practitioner
Sherees Ofori
Behavior Technician
Claudia Ofori-Marfoh, MD
Urology Physician
Alexis Ogren
Professional Counselor
Happiness Oguariri
Family Nurse Practitioner
Raphael Oguariri
Family Nurse Practitioner
Yun Oh, M.D.
Hematology & Oncology Physician
Chigozie Ohanele, NP-C
Primary Care Nurse Practitioner
John Ohsann, PA-C
Physician Assistant
Ojedapo Ojeyemi, M.D
Orthopaedic Surgery of the Spine Physician
Audrey Okech
Massage Therapist
Daniel Okine, BT
Behavior Technician
Sandra Okobi
Behavior Technician
Maryann Okolie Dione
Case Manager/Care Coordinator
Oyebola Oladeinde, PHARM. D.
Pharmacist
Fabio Olarte, M.D.
Neonatal-Perinatal Medicine Physician
Marykay Olive, PT
Physical Therapist
Sarah Oliveira, NP
Oncology Registered Nurse
Sheldon Oliver
Contractor
Alaina Olsen, MS
Mental Health Counselor
Claudia Olson
Acupuncturist
Morgan Olson
Behavior Technician
Nils Olson, D.D.S.
General Practice Dentistry
Ashley Olszewski, CRNP
Obstetrics & Gynecology Nurse Practitioner
Ihsan Omar, LCSW-C, CST
Clinical Social Worker
Nkechi Onazi
Registered Nurse

Nearby Cities in Maryland

Other Maryland cities with provider coverage in the CMS NPPES registry.

Compare specialties side-by-side →

Frequently Asked Questions

How many doctors are in Frederick, MD?
There are 3,850 registered healthcare providers in Frederick, MD, covering 20 specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Frederick?
The most common specialties in Frederick are Behavior Technician, Clinical Social Worker, Physical Therapist, Mental Health Counselor, Professional Counselor. Behavior Technician has the most providers with 368.

Provider data from CMS NPPES (download.cms.gov/nppes); specialty classification from NUCC Health Care Provider Taxonomy. PlainDoctor does not rate or rank providers. Methodology · About

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from CMS National Plan and Provider Enumeration System (NPPES). Consult a qualified professional before making decisions based on this data.

Compiled from official public sources by the PlainDoctor editorial team.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-20.