Douglas S. Demartinis, MD
Emergency Medicine Physician · Stockton, CA
Douglas S. Demartinis, MD is an emergency medicine physician with a practice address in Stockton, California, and NPI 1699797993, issued on Jul 24, 2006. Check the license (California G45266, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Douglas S. Demartinis
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G45266 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1800 N California St, Stockton, CA 95204
- Phone
- (209) 467-6444
- Enumerated
- Jul 24, 2006
- Record last updated
- Apr 25, 2018 (not updated in 8 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1800 N California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Najiba Afzal, MDStudent in an Organized Health Care Education/Training Program1033978572
- Khaja AhmedPharmacist1982241709
- Nabeel Ahmed, MDStudent in an Organized Health Care Education/Training Program1083552780
- Savannah AibayeStudent in an Organized Health Care Education/Training Program1619508553
Verify Douglas S. Demartinis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G45266Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average emergency medicine physician in 2024
45 Medicare Part D claims for 39 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Douglas S. Demartinis among 7,751 emergency medicine physician records in California
Douglas S. Demartinis, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2018 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Stockton → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Denise Ammon, M.D.Stockton, CA 952041518222876
- Jason Darr, DOStockton, CA 952041699237099
- Anatoliy Goltser, MDStockton, CA 952041780903203
- Zachary Haberman, M.D.Stockton, CA 952041831553171
- Samuel Kaplan, MDStockton, CA 952041588168793
- Justin Leach, DOStockton, CA 952041124580527
- Louis Marquet, D.O.Stockton, CA 952041083976286
- Matthew Nottingham, MDStockton, CA 952041962993964
Common questions
What is Douglas S. Demartinis, MD's NPI number?
Douglas S. Demartinis, MD's National Provider Identifier (NPI) is 1699797993, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Douglas S. Demartinis, MD located?
The NPPES record lists a practice address at 1800 N California St, Stockton, CA, 95204. Phone: (209) 467-6444. Providers update this record themselves, so call before visiting.
How can I verify Douglas S. Demartinis, MD's license?
NPPES lists California license number G45266, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Douglas S. Demartinis, MD prescribe under Medicare Part D?
In 2024, Douglas S. Demartinis, MD had 45 Medicare Part D claims for 39 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.