Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Harold Carter Davidson, MD, PHD
Otolaryngology Physician in Chambersburg, PA · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1487804555
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 9530742 | Other | PA | AETNA NON HMO |
| 102664076 0001 | Medicaid | PA | - |
| 2638503 | Other | PA | HIGHMARK BLUE SHIELD |
| 8125592 | Other | PA | AETNA HMO |
| P00964839 | Other | PA | RAILROAD MEDICARE |
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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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-09.