Michael Shanahan, M.D.
NPI 1255400354 · Internal Medicine Physician · Portland, OR
Michael Shanahan, M.D. is a Internal Medicine Physician provider in Portland, OR (NPI 1255400354).
Provider details
- NPI number
- 1255400354
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD12860 (OR)
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
19 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
- 2006-11-06
- Last updated
- 2025-09-11
Frequently asked questions
- What is Michael Shanahan's NPI number?
- Michael Shanahan's National Provider Identifier (NPI) is 1255400354, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Shanahan's specialty?
- Michael Shanahan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Shanahan located?
- Michael Shanahan's practice location on file with NPPES is 9205 Sw Barnes Rd, Portland, OR 97225-6603.
- What is Michael Shanahan's phone number?
- The practice phone number listed in the NPPES registry for Michael Shanahan is (503) 216-1763.
- Is Michael Shanahan's NPI active?
- Yes — Michael Shanahan's NPI (1255400354) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.