Joseph Ahn, M.D.
NPI 1790162204 · Gastroenterology Physician · Rochester, MN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Ahn, M.D. is a Gastroenterology Physician provider in Rochester, MN (NPI 1790162204).
Provider details
- NPI number
- 1790162204
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A148213 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Spironolactone | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (2)
- 1465 65th St305Emeryville, CA 94608-1062Phone: (818) 272-1155
- 8700 Beverly BlvdWest Hollywood, CA 90048Phone: (310) 423-5000
Registry dates
- Enumerated
- 2015-05-04
- Last updated
- 2020-08-05
- Certified
- 2020-08-05
Frequently asked questions
- What is Joseph Ahn's NPI number?
- Joseph Ahn's National Provider Identifier (NPI) is 1790162204, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Ahn's specialty?
- Joseph Ahn is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Ahn located?
- Joseph Ahn's practice location on file with NPPES is 200 1st St Sw, Rochester, MN 55905-0001.
- What is Joseph Ahn's phone number?
- The practice phone number listed in the NPPES registry for Joseph Ahn is (507) 284-2511.
- Does Joseph Ahn accept Medicare?
- Joseph Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Ahn's NPI active?
- Yes — Joseph Ahn's NPI (1790162204) is active in the NPPES registry as of the last update on 2020-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.