Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Guy Scott Mullin, M.D.
Ophthalmology Physician in Langhorne, PA · enumerated 2006 · practices at Newtown Laser and Eye Institute.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285680157
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1636160011 | Other | PA | CIGNA |
| 2128908 | Other | PA | AETNA |
| 233004475 | Other | - | UNITED HEALTHCARE |
| P00027690 | Other | NJ | RAILROAD MEDICARE |
| 0025581000 | Other | PA | KEYSTONE |
| 180036195 | Other | PA | RAILROAD MEDICARE |
| P1884042 | Other | - | OXFORD |
| 1636160010 | Other | NJ | CIGNA |
| 583196 | Other | NJ | AETNA |
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
Is NPI 1285680157 active?
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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 2016-12-01.