Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Geoffrey Trenkle Do A Professional Medical Corporation

Otolaryngology Physician in Los Angeles, CA · enumerated 2014 · authorized official Geoffrey Trenkle, Owner.

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

National Provider Identifier

1992124978

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Geoffrey Trenkle Do A Professional Medical Corporation

Other name <Unavail>

Practice address 1700 E Cesar E Chavez Ave Ste 2500, Los Angeles, CA, 90033

Phone (909) 569-9097

Fax (323) 268-6738

Enumeration date Apr 7, 2014

Last updated in NPPES Oct 30, 2019

Taxonomy & classification

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License 20A13166 (CA) Primary

Authorized official

Name Geoffrey Trenkle

Title Owner

Phone (909) 553-3445

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 is the NPI number for Geoffrey Trenkle Do A Professional Medical Corporation?

The NPI for Geoffrey Trenkle Do A Professional Medical Corporation is 1992124978, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Geoffrey Trenkle Do A Professional Medical Corporation?

NPPES lists Geoffrey Trenkle (Owner) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-10-30.