Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Michael Richard Portillo, M.D.

Family Medicine Physician in Sonora, CA · enumerated 2015.

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

National Provider Identifier

1306235957

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Richard Portillo

Credential M.D.

Sex Male

Practice address Sonora, CA, 95370

Phone (209) 536-5770

Fax (209) 536-3596

Enumeration date Jan 21, 2015

Last updated in NPPES Dec 14, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A144432 (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

Where does Michael Portillo practice?

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

What is the NPI number for Michael Portillo?

The National Provider Identifier (NPI) for Michael Portillo is 1306235957, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-12-14.