Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Patrick J Cahill, M.D.

Specialist in Long Beach, CA · enumerated 2006.

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

National Provider Identifier

1003855958

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Patrick J Cahill

Credential M.D.

Sex Male

Practice address 1040 Elm Ave, Suite 102, Long Beach, CA, 90813

Phone (562) 437-3833

Fax (562) 624-0741

Enumeration date Jun 6, 2006

Last updated in NPPES Jul 27, 2010

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A30540 (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
HW8412A	Other	CA	PTAN/LEGACY PACIFIC HOSP
HW881	Other	CA	ST MARYS PTAN
HW8412B	Other	CA	PTAN/LEGACY COMMUNITY HOSP
HW8412	Other	CA	GROUP PTAN
00A305400	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

How do I verify Patrick Cahill's NPI record?

Cross-check NPI 1003855958 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1003855958 active?

Yes, as of the latest NPPES snapshot, NPI 1003855958 is active (record last updated 2010-07-27).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-27.