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

Individual provider Internal Medicine Physician · NPI 1427410141

Dr. Maren K Ketcham, MD practises Internal Medicine in Washington, District of Columbia. Qualified in 2016, 10 years ago. Practices with One Medstar Primary Care LLC, a 140-clinician group, works from 4 locations, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
10
Licensed in
MD
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1001 G St NW Ste 200E
Washington, DC 20001-4546
Phone: (888) 663-6331
Fax: (415) 252-7176
Show map & directions

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

Additional practice locations (3)

  • 2333 Ontario Rd Nw, Washington, DC 20009-2627 — (202) 483-8196
  • 1040 Park Ave, Baltimore, MD 21201-5633 — (443) 738-0300
  • 4401 Penn Ave, Pittsburgh, PA 15224-1334 — (412) 692-5285

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence D0089431 (MD)

Record details

NPI number1427410141
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 22, 2016
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 specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice One Medstar Primary Care Llc — 140 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients43
Services billed 122 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

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 Washington