Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Geoffrey B Trenkle, D.O.

Facial Plastic Surgery Physician in Los Angeles, CA · enumerated 2009 · practices at Geoffrey Trenkle Do A Professional Medical Corporation.

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

National Provider Identifier

1003044876

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Registry record

Entity type Individual (Type 1)

Name Geoffrey B Trenkle

Credential D.O.

Sex Male

Practice address Los Angeles, CA, 90033

Phone (323) 268-6731

Fax (323) 268-6738

Enumeration date Jun 30, 2009

Last updated in NPPES Oct 18, 2019

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207YS0123X Facial Plastic Surgery Physician Allopathic & Osteopathic Physicians · License 20A13166 (CA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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

What is the NPI number for Geoffrey Trenkle?

The National Provider Identifier (NPI) for Geoffrey Trenkle is 1003044876, a Type 1 (individual) record in the CMS NPPES registry.

Where does Geoffrey Trenkle practice?

The practice location on file with NPPES is in Los Angeles, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-10-18.