Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Ken C. Tan, M.D.

Q: What type of organization is Ken C. Tan, M.D.?

Ken C. Tan, M.D. is registered in NPPES as a Anesthesiology Physician (its primary provider taxonomy).

Anesthesiology Physician in Glendora, CA · enumerated 2006 · authorized official Alan Ryono, Office Manager.

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

National Provider Identifier

1982764361

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Registry record

Entity type Organization (Type 2)

Legal business name Ken C. Tan, M.D.

Practice address 250 S Grand Ave, Glendora, CA, 91741

Phone (626) 857-3140

Enumeration date Dec 8, 2006

Last updated in NPPES Oct 1, 2007

Taxonomy & classification

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 12782 (CA) Primary

Authorized official

Name Alan Ryono

Title Office Manager

Phone (626) 964-6352

Other identifiers

Identifier	Type	State	Issuer
00A319380	Medicaid	CA	-

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 Ken C. Tan, M.D.?

Ken C. Tan, M.D. is registered in NPPES as a 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-01.