Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Peter Greenberg, MD

Radiation Oncology Physician in Palm Desert, CA · enumerated 2006 · practices at Genesiscare Usa of California A Medical Corporation.

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

National Provider Identifier

1568552859

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Registry record

Entity type Individual (Type 1)

Name Dr. Peter Greenberg

Credential MD

Sex Male

Practice address 77840 Flora Rd, Palm Desert, CA, 92211

Phone (760) 200-8777

Fax (760) 200-8877

Enumeration date Oct 15, 2006

Last updated in NPPES Aug 26, 2009

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G48958 (CA) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License G48958 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
P00703711	Other	CA	RAILROAD MEDICARE
00G489580	Other	CA	BLUE SHIELD / TRICARE CALI.
GR0063580	Medicaid	CA	-
4103385	Other	CA	AETNA

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

Is NPI 1568552859 active?

Yes, as of the latest NPPES snapshot, NPI 1568552859 is active (record last updated 2009-08-26).

How do I verify Peter Greenberg's NPI record?

Cross-check NPI 1568552859 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Theodore Masek Radiation Oncology Physician · Palm Desert, CA NPI 1720073935 Genesiscare Usa of California A Medical Corporation Radiation Oncology Physician · Palm Desert, CA NPI 1861472318 Ted Ling Radiation Oncology Physician · Palm Desert, CA NPI 1902121544 Xiaolin Li Contractor · Palm Desert, CA NPI 1467095943

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-08-26.