Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Thomas Mark Hartley, M.D.

Orthopaedic Surgery Physician in Riverside, CA · enumerated 2005.

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

National Provider Identifier

1164407391

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Registry record

Entity type Individual (Type 1)

Name Mr. Thomas Mark Hartley

Credential M.D.

Sex Male

Practice address 4444 Magnolia Ave, Riverside, CA, 92501

Phone (951) 682-5661

Fax (951) 686-3758

Enumeration date Dec 9, 2005

Last updated in NPPES Jul 13, 2018

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 100628 (MO) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License G89301 (CA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
1164407391	Other	-	COVENTRY
P00455132	Other	-	RAILROAD MEDICARE
18475026	Other	-	BCBS
3076318	Other	-	CIGNA
4364771	Other	-	AETNA
1164407391	Other	-	TRICARE
1093058	Other	-	UNITED HEALTH CARE

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.

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Frequently asked questions

Is NPI 1164407391 active?

Yes, as of the latest NPPES snapshot, NPI 1164407391 is active (record last updated 2018-07-13).

How do I verify Thomas Hartley's NPI record?

Cross-check NPI 1164407391 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 2018-07-13.