Michael Harrison, MD
NPI 1528008554 · Critical Care Medicine (Internal Medicine) Physician · Grand Rapids, MI
Michael Harrison, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Grand Rapids, MI (NPI 1528008554).
Provider details
- NPI number
- 1528008554
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301056333 (MI)
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
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
- 2006-06-07
- Last updated
- 2026-01-29
- Certified
- 2026-01-29
Frequently asked questions
- What is Michael Harrison's NPI number?
- Michael Harrison's National Provider Identifier (NPI) is 1528008554, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Harrison's specialty?
- Michael Harrison is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Harrison located?
- Michael Harrison's practice location on file with NPPES is 4100 Lake Dr Se, Grand Rapids, MI 49546-8292.
- What is Michael Harrison's phone number?
- The practice phone number listed in the NPPES registry for Michael Harrison is (616) 267-8244.
- Is Michael Harrison's NPI active?
- Yes — Michael Harrison's NPI (1528008554) is active in the NPPES registry as of the last update on 2026-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.