Robert Mastman, M.D.
NPI 1386683191 · Ophthalmology Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Mastman, M.D. is a Ophthalmology Physician provider in San Jose, CA (NPI 1386683191).
Provider details
- NPI number
- 1386683191
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A37122 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,938 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 864 | $164 |
| Established Patient Problem Focused Exam of Visual System92012 | 553 | $121 |
| Imaging of Retina92134 | 375 | $54 |
| Photography of the Retina92250 | 294 | $50 |
| Exam of Visual Field With Extended Testing92083 | 237 | $88 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 171 | $211 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 439 | 141 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 106 | 89 |
| Brimonidine Tartrate | 45 | 13 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 44 | 39 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 41 | 18 |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 35 | 13 |
| Cyclosporine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$405 across 18 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-06
- Last updated
- 2011-11-23
Frequently asked questions
- What is Robert Mastman's NPI number?
- Robert Mastman's National Provider Identifier (NPI) is 1386683191, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Mastman's specialty?
- Robert Mastman is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Mastman located?
- Robert Mastman's practice location on file with NPPES is 2577 Samaritan Dr, San Jose, CA 95124-4100.
- What is Robert Mastman's phone number?
- The practice phone number listed in the NPPES registry for Robert Mastman is (408) 358-2029.
- Does Robert Mastman accept Medicare?
- Robert Mastman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Mastman's NPI active?
- Yes — Robert Mastman's NPI (1386683191) is active in the NPPES registry as of the last update on 2011-11-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.