Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Porteous, MD

Surgery Physician in Modesto, CA · enumerated 2005.

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

National Provider Identifier

1669460630

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Registry record

Entity type Individual (Type 1)

Name John Porteous

Credential MD

Sex Male

Practice address 1541 Florida Ave, Suite 200, Modesto, CA, 95350

Phone (209) 577-3388

Fax (209) 523-0764

Enumeration date Oct 12, 2005

Last updated in NPPES Mar 29, 2011

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License C2981 (CA) Primary

2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License C2981 (CA) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License C2981 (CA) Secondary

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License C2981 (CA) Secondary

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
CD069A	Other	CA	MEDICARE GROUP PTAN
020013716	Other	CA	RAILROAD MEDICARE
CF369Z	Other	CA	MEDICARE INDIVIDUAL PTAN
ZZZ48224Z	Other	CA	MEDICARE IDENTIFICATION #

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 John Porteous?

The National Provider Identifier (NPI) for John Porteous is 1669460630, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Porteous practice?

The practice location on file with NPPES is in Modesto, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-29.