Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Peter H. Sim, M.D., Inc.

Infectious Disease Physician in La Mirada, CA · enumerated 2007 · authorized official Peter Sim, Owner.

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

National Provider Identifier

1528255080

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Registry record

Entity type Organization (Type 2)

Legal business name Peter H. Sim, M.D., Inc.

Practice address 14900 Imperial Hwy, La Mirada, CA, 90638

Phone (213) 388-2232

Enumeration date Sep 28, 2007

Last updated in NPPES Oct 11, 2007

Taxonomy & classification

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License A67722 (CA) Primary

Authorized official

Name Peter Sim

Title Owner

Phone (213) 388-2232

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

Where is Peter H. Sim, M.D., Inc. located?

The practice location on file with NPPES is in La Mirada, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-10-11. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-11.