Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mary Kathryn Barth, PA-C

Individual provider Medical Physician Assistant · NPI 1508104993

Mary Kathryn Barth, PA-C is a Physician Assistant in Chevy Chase, Maryland. Qualified in 2012, 14 years ago. Practices with One Medstar Primary Care LLC, a 140-clinician group and accepts Medicare assignment. Licensed in Maryland and Nebraska.

Years since qualifying
14
Licensed in
MD, NE
In the registry since
2013
Specialties on file
2
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

See every abbreviation used in this directory →

Practice location Address checks out

8401 Connecticut Ave Ph Ste
Chevy Chase, MD 20815-5822
Phone: (301) 942-2212
Fax: (415) 252-7176
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Physician Assistant (primary) Taxonomy 363AM0700X · Licence C0004964 (MD)
Medical Physician Assistant Taxonomy 363AM0700X · Licence 1696 (NE)

Record details

NPI number1508104993
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedJanuary 21, 2013
Last updated in NPPESMarch 17, 2025
Certification dateMarch 17, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice One Medstar Primary Care Llc — 140 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients148
Services billed 340 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at One Medstar Primary Care LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 140 clinicians in the practice; 12 are shown here.

Other providers in Chevy Chase