Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John W. Ritter MD Inc.

Q: What type of organization is John W. Ritter MD Inc.?

John W. Ritter MD Inc. is registered in NPPES as a Pain Medicine (Anesthesiology) Physician (its primary provider taxonomy).

Pain Medicine (Anesthesiology) Physician in Glendora, CA · enumerated 2012 · authorized official John Ritter, President.

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

National Provider Identifier

1326305343

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Registry record

Entity type Organization (Type 2)

Legal business name John W. Ritter MD Inc.

Practice address 640 W Foothill Blvd Ste 101, Glendora, CA, 91741

Phone (626) 335-5452

Fax (626) 335-5462

Enumeration date Apr 16, 2012

Last updated in NPPES May 15, 2012

Taxonomy & classification

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License A20970 (CA) Primary

Authorized official

Name John Ritter

Title President

Phone (626) 335-5452

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 John W. Ritter MD Inc.?

John W. Ritter MD Inc. is registered in NPPES as a Pain Medicine (Anesthesiology) 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-05-15.