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

Reese Prescott Isaacson

Internal Medicine Physician in San Pedro, CA · enumerated 2013 · practices at Harbor Community Clinic Inc..

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

National Provider Identifier

1154765998

Verified

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Registry record

Entity type Individual (Type 1)

Name Reese Prescott Isaacson

Sex Male

Practice address San Pedro, CA, 90731

Phone (310) 547-0202

Enumeration date Apr 23, 2013

Last updated in NPPES Jul 2, 2026

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A134430 (CA) Primary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 56916 (CT) Secondary

Other identifiers

Identifier	Type	State	Issuer
RI3232267556	Other	-	USC

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 specialty is Reese Isaacson?

Reese Isaacson is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Harbor Community Clinic Inc. Federally Qualified Health Center (FQHC) · San Pedro, CA NPI 1467490425 Uduak Iluore Internal Medicine Physician · San Pedro, CA NPI 1598841983 Evelyn Desser Family Nurse Practitioner · San Pedro, CA NPI 1255459129 John Russo Public Health & General Preventive Medicine Physician · San Pedro, CA NPI 1013120286 Denise Donahue Physician Assistant · San Pedro, CA NPI 1467665430 Lisa Zwerling Pediatrics Physician · San Pedro, CA NPI 1952589533 Dianne Bohorquez Clinical Psychologist · San Pedro, CA NPI 1467617142 Jonathan Lee Obstetrics & Gynecology Physician · San Pedro, CA NPI 1609100049

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-02.