Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Jeanne E O'Brien, M.D.
Reproductive Endocrinology Physician in Rockville, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164503058
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 199489 | Other | - | ANTHEM |
| 886940-01 | Other | MD | CAREFIRST BCBS |
| 0906-0020 | Other | - | CAREFIRST BCBS |
| 2147646 | Other | - | MAMSI |
| 260038 | Other | - | KAISER PERMANENTE |
| 1257626 | Other | - | AETNA |
| 756592 | Other | - | NCPPO |
| 198489 | Other | - | ANTHEM HEALTHKEEPERS |
| 2147646 | Other | - | UNITEDHEALTHCARE |
| 4161559 | Other | - | CIGNA |
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 2007-07-08.