Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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John Mark Ryan, MD

Individual provider Internal Medicine Physician · NPI 1841230968

John Mark Ryan, MD practises Internal Medicine in Providence, Rhode Island. Graduated from Warren Alpert Medical School of Brown University in 1984, 42 years ago. Practices with Brown Medicine, a 221-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Rhode Island.

Years since qualifying
42
Trained at
Warren Alpert Medical School of Brown University
Licensed in
RI
In the registry since
2006
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

245 Chapman St
Providence, RI 02905-4539
Phone: (401) 444-4741
Fax: (401) 444-4445
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 375 Wampanoag Trl, Riverside, RI 02915-2232 — (401) 649-4020

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD07097 (RI)

Record details

NPI number1841230968
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 7, 2006
Last updated in NPPESAugust 14, 2025
Certification dateAugust 14, 2025

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolWARREN ALPERT MEDICAL SCHOOL OF BROWN UNIVERSITY
Graduated 1984 (42 years in practice)
Group practice Brown Medicine — 221 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients237
Services billed 726 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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. Those with a page here are linked.

  • The Miriam Hospital Hospital · Providence, RI
  • Rhode Island Hospital Hospital · Providence, RI

Colleagues at Brown Medicine

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 221 clinicians in the practice; 12 are shown here.

Other providers in Providence