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

Joseph C. Ahn, MD

Individual provider Internal Medicine Physician · NPI 1790162204

Joseph C. Ahn, MD practises Gastroenterology in Rochester, Minnesota. Graduated from University of California, San Francisco School of Medicine in 2015, 11 years ago. Practices with Mayo Clinic, a 4,796-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California and Minnesota.

Years since qualifying
11
Trained at
University of California, San Francisco School of Medicine
Licensed in
CA, MN
In the registry since
2015
Specialties on file
2
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

200 1st St SW
Rochester, MN 55905-0001
Phone: (507) 284-2511
Fax: (310) 967-1773
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1465 65th St, Emeryville, CA 94608-1062 — (818) 272-1155
  • 8700 Beverly Blvd, West Hollywood, CA 90048 — (310) 423-5000

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 65447 (MN)
Internal Medicine Physician Taxonomy 207R00000X · Licence A148213 (CA)

Record details

NPI number1790162204
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 4, 2015
Last updated in NPPESAugust 5, 2020
Certification dateAugust 5, 2020

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Mayo Clinic — 4796 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mayo Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 4796 clinicians in the practice; 12 are shown here.

Other providers in Rochester