Doctors and health care providers in Frederick, MD
3,981 individual NPPES records list a practice address in Frederick, 6th of 284 Maryland cities. The largest group is behavior technician: 427, 11% of the city's records, against 16% across Maryland. Page 18 of 80.
The 8 largest groups in Frederick
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
Frederick in Maryland
- Rank in Maryland6th of 284 cities by records
- Share of the state2.5% of Maryland's records
- Specialties present25 or more taxonomy codes
- Top three groups25.7% of all records
Compared with Maryland as a whole, Frederick has 2.3× the state's share of massage therapist records and 0.60× its share of internal medicine physician records.
Providers in Frederick, alphabetically
- Summer De La Cruz, LICSWClinical Social Worker1447709936
- Constance De La Vega, OTOccupational Therapist1366745507
- Lemuel Carlo De Leon, CRNPFamily Nurse Practitioner1619446622
- Laura De Lima Souza BonaseraBehavior Analyst1932897451
- Tess De Smedt, LMSWSocial Worker1780362459
- Nuria De SouzaBehavior Technician1538092184
- Nicolas DearcangelisBehavior Technician1831826700
- Kourtney Deboer, LMFTMarriage & Family Therapist1992113781
- Miguel DecastroSocial Worker1467240069
- Vivian Dechosa, M.D.Family Medicine Physician1689604654
- Helen Decker, RBTBehavior Technician1144996968
- Kristin Deely, CRNPAcute Care Nurse Practitioner1063917938
- Laura DefeoHealth Educator1255091724
- Ryan Defibaugh, LCPC, NCCProfessional Counselor1639665995
- Emma Lee Defreitas, RNCase Management Registered Nurse1619844313
- Roy DegrangeCertified Registered Nurse Anesthetist1053942284
- Safrianna Degroat, LCPCProfessional Counselor1093364499
- Richard Deise, LGPCPastoral Counselor1669983607
- Justine Del Nunzio, LMSWSocial Worker1588243810
- Abigail DelauterBehavior Technician1376105668
- Daniel Delauter, CRNPFamily Nurse Practitioner1801315288
- Heather DelauterFamily Nurse Practitioner1932979978
- Sophia DelauterBehavior Technician1780287029
- Brittany DelawderBehavior Technician1295254217
- Gerard Delgrippo, M.D.Family Medicine Physician1447233234
- Gabriella Delpo, LMSWSocial Worker1801652060
- Gregory Demaille, D.C.Chiropractor1902835382
- Donna Demattia, P.T.Physical Therapist1770824708
- Ashleigh Demoll Carpenter, D.O.Emergency Medicine Physician1598184806
- Heather Demory, PA-CPhysician Assistant1508911850
- Barbara Denn, OTR/LOccupational Therapist1134690415
- William Derbyshire, LCSW-CClinical Social Worker1720082480
- Adelle Deriquito, LCPCProfessional Counselor1235774720
- Constance DerosaAdult Health Nurse Practitioner1508428103
- Leah Derr, LGSWSocial Worker1043727258
- Abhishek DesaiOccupational Therapist1538627625
- Anish Desai, M.D.Pulmonary Disease Physician1447465232
- Jeffery Deschamps, DCChiropractor1821008897
- Derek Deshaies, MDSurgery Physician1174084115
- Nicole Deshaies, MDSurgery Physician1457813495
- Narayan Deshmukh, MDSurgery Physician1124093307
- Joshua DeslauriersBehavior Technician1235091315
- Leena Dev, MDPediatrics Physician1093725616
- Elizabeth Devilbiss, LCPCProfessional Counselor1558514455
- Jo Devivo, PA-CPhysician Assistant1992581532
- Frances Devlin, RNAdministrator Registered Nurse1518024736
- Cassandra Devries, D.C.Chiropractor1477979227
- Devan DeweesClinical Social Worker1790185007
- Megan Dewing, MT-BCMusic Therapist1710387311
- Tanya Dewitt, MDObstetrics & Gynecology Physician1881753689
The largest Maryland cities
- Baltimore35,183
- Rockville14,353
- Bethesda7,245
- Columbia6,690
- Silver Spring6,531
How to read this directory
Frederick, Maryland appears in the CMS National Plan and Provider Enumeration System with 3,981 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 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 2024 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 (427 clinicians, followed by Clinical Social Worker with 348 and Physical Therapist with 249). 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 64.4 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 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. 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 Frederick, MD?
There are 3,981 registered healthcare providers in Frederick, MD, covering 25 or more 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, Professional Counselor, Mental Health Counselor. Behavior Technician has the most providers with 427.
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.