Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

California Cancer Specialists Medical Group Inc

Anesthesiology Physician in Duarte, CA · enumerated 2006 · authorized official Lawrence Weiss, President.

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

National Provider Identifier

1912006636

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Registry record

Entity type Organization (Type 2)

Legal business name California Cancer Specialists Medical Group Inc

Practice address 1500 Duarte Rd, Duarte, CA, 91010

Phone (626) 359-8111

Enumeration date Sep 21, 2006

Last updated in NPPES May 21, 2009

Taxonomy & classification

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians Primary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians Secondary

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians Secondary

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians Secondary

208200000X Plastic Surgery Physician Allopathic & Osteopathic Physicians Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians Secondary

208VP0000X Pain Medicine Physician Allopathic & Osteopathic Physicians Secondary

208VP0014X Interventional Pain Medicine Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Lawrence Weiss

Title President

Phone (626) 359-8111

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 California Cancer Specialists Medical Group Inc?

The NPI for California Cancer Specialists Medical Group Inc is 1912006636, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for California Cancer Specialists Medical Group Inc?

NPPES lists Lawrence Weiss (President) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-05-21.