Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Barbara Callahan

Q: What type of organization is Barbara Callahan?

Barbara Callahan is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Internal Medicine Physician in West Hills, CA · enumerated 2007 · authorized official Barbara Callahan, Owner.

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

National Provider Identifier

1871622613

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Registry record

Entity type Organization (Type 2)

Legal business name Barbara Callahan

Practice address 7301 Medical Center Dr, 402, West Hills, CA, 91307

Phone (818) 227-0070

Enumeration date Mar 5, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License C41130 (CA) Primary

Authorized official

Name Barbara Callahan

Title Owner

Phone (818) 227-0070

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

What type of organization is Barbara Callahan?

Barbara Callahan is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.