IndividualActive
John Clarkson, M.D.
NPI 1861639791 · General Practice Physician · Lansing, MI
John Clarkson, M.D. is a General Practice Physician provider in Lansing, MI (NPI 1861639791).
Provider details
- NPI number
- 1861639791
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301042316 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(86/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 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
1322 E Michigan Ave
Suite 101
Lansing, MI 48912-2199
Phone: (517) 364-3593
Fax: (517) 364-3514
Street-level locationGet directions
Mailing address
1322 E Michigan Ave
Lansing, MI 48912-2199
Registry dates
- Enumerated
- 2009-01-14
- Last updated
- 2009-01-14
Frequently asked questions
- What is John Clarkson's NPI number?
- John Clarkson's National Provider Identifier (NPI) is 1861639791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Clarkson's specialty?
- John Clarkson is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is John Clarkson located?
- John Clarkson's practice location on file with NPPES is 1322 E Michigan Ave, Lansing, MI 48912-2199.
- What is John Clarkson's phone number?
- The practice phone number listed in the NPPES registry for John Clarkson is (517) 364-3593.
- Is John Clarkson's NPI active?
- Yes — John Clarkson's NPI (1861639791) is active in the NPPES registry as of the last update on 2009-01-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.