David Robert Demartini, M.D.
Ophthalmology Physician · Walnut Creek, CA
David Robert Demartini, M.D. is an ophthalmology physician with a practice address in Walnut Creek, California, and NPI 1437134855, issued on Dec 8, 2005. Check the license (California G390000, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Robert Demartini
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- G390000 CA
Self-reported in NPPES; status is on the state search - Practice location
- 122 LA Casa Via, Walnut Creek, CA 94598
- Phone
- (925) 947-0888
- Enumerated
- Dec 8, 2005
- Record last updated
- Sep 5, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (925) 947-4385
- Medicaid IDs
- 00G390000 CA
00G390001 CA - Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 122 LA Casa Via
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lina Chan, ODOptometrist1659358042
- Allen Verne, M.D.Ophthalmology Physician1093749491
Verify David Robert Demartini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G390000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average ophthalmology physician in 2024
151 Medicare Part D claims for 55 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 37% of claims.
Most prescribed
- Latanoprost30 claims
- Moxifloxacin18 claims
- Timolol Maleate15 claims
- Erythromycin12 claims
- Neomycin-Polymyxin-Dexameth12 claims
- Prednisolone Acetate11 claims
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.
David Robert Demartini among 2,899 ophthalmology physician records in California
David Robert Demartini, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2013 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Walnut Creek → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- James Dowling, M.D.Walnut Creek, CA 945981891757506
- Vahid Feiz, M.D.Walnut Creek, CA 945981083698732
- David Gilbert, MDWalnut Creek, CA 945981033297536
- Jenny Jacq, MDWalnut Creek, CA 945981477508927
- Ethan Kutzscher, MDWalnut Creek, CA 945981700881661
- Michelle Nee, MDWalnut Creek, CA 945981093893182
- Stephanie Po, MDWalnut Creek, CA 945981003994187
- John Riedel, MDWalnut Creek, CA 945981205892825
Common questions
What is David Robert Demartini, M.D.'s NPI number?
David Robert Demartini, M.D.'s National Provider Identifier (NPI) is 1437134855, issued on Dec 8, 2005. An NPI identifies a provider in billing; it is not a license.
Where is David Robert Demartini, M.D. located?
The NPPES record lists a practice address at 122 LA Casa Via, Walnut Creek, CA, 94598. Phone: (925) 947-0888. Providers update this record themselves, so call before visiting.
How can I verify David Robert Demartini, M.D.'s license?
NPPES lists California license number G390000, 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 David Robert Demartini, M.D. prescribe under Medicare Part D?
In 2024, David Robert Demartini, M.D. had 151 Medicare Part D claims for 55 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.