Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas S Demartinis, MD

Emergency Medicine Physician in Stockton, CA · enumerated 2006.

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

National Provider Identifier

1699797993

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Registry record

Entity type Individual (Type 1)

Name Dr. Douglas S Demartinis

Credential MD

Sex Male

Practice address 1800 N California St, Stockton, CA, 95204

Phone (209) 467-6444

Enumeration date Jul 24, 2006

Last updated in NPPES Apr 25, 2018

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License G45266 (CA) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License G45266 (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 Douglas Demartinis practice?

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

What is the NPI number for Douglas Demartinis?

The National Provider Identifier (NPI) for Douglas Demartinis is 1699797993, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-25.