DR. DOUGLAS S DEMARTINIS MD
NPI 1699797993
Emergency Medicine in Stockton, CA
About Dr. Douglas S Demartinis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DOUGLAS S DEMARTINIS MD (NPI 1699797993) is an individual emergency medicine provider in Stockton, California, licensed in California (G45266) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Douglas S Demartinis Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Douglas Demartinis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Ramon, CA 94583
- Reassigned Medicare billing, California enrollment
- 168 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95204 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STOCKTON, CA 95204
STOCKTON, CA 95204
STOCKTON, CA 95204
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Douglas Demartinis's NPI number?
The NPI number for Douglas Demartinis is 1699797993. It was assigned to this individual provider in the NPPES registry on July 24, 2006.
Where is Douglas Demartinis located?
Douglas Demartinis practices at 1800 N California St, Stockton, CA 95204. The listed phone number is (209) 467-6444.
What is Douglas Demartinis's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Douglas Demartinis enrolled in Medicare?
Yes. Douglas Demartinis is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Douglas Demartinis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Douglas Demartinis reassigns Medicare benefits to San Francisco Physicians International Medical Group, Inc (San Ramon, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Douglas Demartinis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Douglas Demartinis was last updated on April 25, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.