John Allen, MD
NPI 1154393502 · Gastroenterology Physician · Ann Arbor, MI
John Allen, MD is a Gastroenterology Physician provider in Ann Arbor, MI (NPI 1154393502).
Provider details
- NPI number
- 1154393502
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301110254 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-01
- Last updated
- 2019-01-21
Frequently asked questions
- What is John Allen's NPI number?
- John Allen's National Provider Identifier (NPI) is 1154393502, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Allen's specialty?
- John Allen is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Allen located?
- John Allen's practice location on file with NPPES is 1500 East Medical Center Drive, Ann Arbor, MI 48109-5362.
- What is John Allen's phone number?
- The practice phone number listed in the NPPES registry for John Allen is (734) 647-5944.
- Is John Allen's NPI active?
- Yes — John Allen's NPI (1154393502) is active in the NPPES registry as of the last update on 2019-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.