Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Martha B. Koo, M.D., Ltd.

Adult Mental Health Clinic/Center in Hermosa Beach, CA · enumerated 2007 · authorized official Martha Koo, President.

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

National Provider Identifier

1487848404

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Registry record

Entity type Organization (Type 2)

Legal business name Martha B. Koo, M.D., Ltd.

Practice address 2615 Pacific Coast Hwy, 215, Hermosa Beach, CA, 90254

Phone (310) 318-2566

Enumeration date Sep 3, 2007

Last updated in NPPES Sep 3, 2007

Taxonomy & classification

261QM0850X Adult Mental Health Clinic/Center Ambulatory Health Care Facilities · License G78080 (CA) Primary

Authorized official

Name Martha Koo

Title President

Phone (310) 318-2566

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 Martha B. Koo, M.D., Ltd. located?

The practice location on file with NPPES is in Hermosa Beach, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-09-03. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-03.