Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ronald Ray Sarmiento Guzman, MD

Hospitalist Physician in Roseville, CA · enumerated 2009.

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

National Provider Identifier

1205061595

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Registry record

Entity type Individual (Type 1)

Name Dr. Ronald Ray Sarmiento Guzman

Credential MD

Sex Male

Practice address 1 Medical Plaza Dr, Roseville, CA, 95661

Phone (916) 781-1927

Fax (916) 781-1787

Enumeration date May 15, 2009

Last updated in NPPES Sep 7, 2018

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 4301093716 (MI) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License C153148 (CA) Primary

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

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 1205061595 active?

Yes, as of the latest NPPES snapshot, NPI 1205061595 is active (record last updated 2018-09-07).

How do I verify Ronald Ray Guzman's NPI record?

Cross-check NPI 1205061595 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-07.