Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Cancer Therapy Medical Group Inc

Radiation Oncology Physician in Alamo, CA · enumerated 2007 · authorized official Jonathan Humphrey, Medical Director / Owner.

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

National Provider Identifier

1952585754

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Registry record

Entity type Organization (Type 2)

Legal business name Cancer Therapy Medical Group Inc

Practice address 1445 Livorna Rd, Alamo, CA, 94507

Phone (925) 952-8700

Enumeration date Dec 28, 2007

Last updated in NPPES Jul 16, 2024

Taxonomy & classification

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Jonathan Humphrey

Title Medical Director / Owner

Phone (925) 952-8700

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Cancer Therapy Medical Group Inc?

Cancer Therapy Medical Group Inc is registered in NPPES as a Radiation Oncology Physician (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-16.