David Demartini, M.D.
NPI 1437134855 · Ophthalmology Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Demartini, M.D. is a Ophthalmology Physician provider in Walnut Creek, CA (NPI 1437134855).
Provider details
- NPI number
- 1437134855
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G390000 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 30 | 11 |
| Moxifloxacin Hclbrand: Moxifloxacin | 18 | — |
| Timolol Maleate | 15 | — |
| Erythromycin Basebrand: Erythromycin | 12 | — |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 12 | — |
| Prednisolone Acetate | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-08
- Last updated
- 2013-09-05
Frequently asked questions
- What is David Demartini's NPI number?
- David Demartini's National Provider Identifier (NPI) is 1437134855, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Demartini's specialty?
- David Demartini is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is David Demartini located?
- David Demartini's practice location on file with NPPES is 122 La Casa Via, Walnut Creek, CA 94598-3052.
- What is David Demartini's phone number?
- The practice phone number listed in the NPPES registry for David Demartini is (925) 947-0888.
- Does David Demartini accept Medicare?
- David Demartini is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Demartini's NPI active?
- Yes — David Demartini's NPI (1437134855) is active in the NPPES registry as of the last update on 2013-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.