Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Michael Leahy, OD
Optometrist in Orland Park, IL · enumerated 2006 · practices at Suburban Optometric Group, P.C..
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1841240389
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0410017674 | Other | IL | RR MEDICARE IND ORLAND PK |
| CN3870 | Other | IL | RR MEDICARE GROUP NUMBER |
| 0363448367 | Other | IL | TAX ID ORLAND PARK |
| 1148260001 | Other | IL | DME/OP |
| 508980 | Other | IL | MEDICARE GROUP OL |
| DA8522 | Other | IL | RR MEDICARE GROUP OP |
| T365669 | Other | IL | UPIN/ OL GROUP |
| 0410022638 | Other | IL | RR MEDICARE IND. OAK LAWN |
| 0363241858 | Other | IL | TAX ID OAK LAWN |
| 0618250001 | Other | IL | DME |
| 985800 | Other | IL | MEDICARE GROUP/ OP |
| W22602 | Other | IL | UPIN/GROUP OP |
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.
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-21.