Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Julianne O'Callahan, MD

Obstetrics & Gynecology Physician in Redwood City, CA · enumerated 2006 · practices at Mojdeh Talebian, M.D., Inc..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1932158805

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Registry record

Entity type Individual (Type 1)

Name Julianne O'Callahan

Credential MD

Sex Female

Practice address 2950 Whipple Ave, Redwood City, CA, 94062

Phone (650) 366-4633

Enumeration date May 9, 2006

Last updated in NPPES May 26, 2020

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License G79159 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1932158805 active?

Yes, as of the latest NPPES snapshot, NPI 1932158805 is active (record last updated 2020-05-26).

How do I verify Julianne O'Callahan's NPI record?

Cross-check NPI 1932158805 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-05-26.