Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor
Dr. Mark W. Schaar, MD
Family Medicine Physician in Lansing, MI · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1932180148
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Registry record
Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0801900432 | Other | MI | BLUE CROSS BLUE SHIELD |
| 0100306 | Other | MI | PHYSICIANS HEALTH PLAN |
| 080D41002 | Other | MI | BLUE CHOICE |
| 080D410020 | Other | MI | BLUE CARE NETWORK |
| 253242 | Other | MI | MCLAREN HEALTH PLAN |
| 253242 | Other | MI | HEALTH ADVANTAGE NETWORK |
| 080D410020 | Other | MI | COMMUNITY BLUE |
| 4279805 | Medicaid | MI | - |
| 4483519 | Other | MI | AETNA |
| 080D410020 | Other | MI | BLUE CROSS BLUE SHIELD |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
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Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-20.