Subhransu Ray, M.D., PH.D.
NPI 1578597878 · Retina Specialist (Ophthalmology) Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Subhransu Ray, M.D., PH.D. is a Retina Specialist (Ophthalmology) Physician provider in Walnut Creek, CA (NPI 1578597878).
Provider details
- NPI number
- 1578597878
- Entity type
- Individual
- Primary specialty
- Retina Specialist (Ophthalmology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G86936 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
6,845 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) |
|---|---|---|
| Imaging of Retina92134 | 1,489 | $51 |
| Photography of the Retina92250 | 1,345 | $46 |
| Injection of Drug Into Eye67028 | 1,312 | $152 |
| Established Patient Complete Exam of Visual System92014 | 865 | $159 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 603 | $110 |
| Established Patient Problem Focused Exam of Visual System92012 | 307 | $114 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
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 |
|---|---|---|
| Prednisolone Acetate | 82 | 62 |
| Moxifloxacin Hclbrand: Moxifloxacin | 60 | 52 |
| Ketorolac Tromethamine | 21 | 15 |
| Brimonidine Tartrate/Timololbrand: Brimonidine Tartrate-Timolol | 16 | 14 |
| Loteprednol Etabonate | 12 | — |
| Timolol Maleate | 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,431 across 32 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
Additional practice locations (3)
- 2219 Buchanan Rd Ste 6Antioch, CA 94509-4200Phone: (925) 522-8850Fax: (925) 522-8851
- 491 30th St Ste 102Oakland, CA 94609-3235Phone: (510) 832-6554Fax: (510) 832-3119
- 15051 Hesperian Blvd Ste DSan Leandro, CA 94578-3536Phone: (510) 317-1111Fax: (510) 317-1113
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2021-04-29
- Certified
- 2021-04-29
Frequently asked questions
- What is Subhransu Ray's NPI number?
- Subhransu Ray's National Provider Identifier (NPI) is 1578597878, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Subhransu Ray's specialty?
- Subhransu Ray is listed in the NPPES registry with a primary specialty of Retina Specialist (Ophthalmology) Physician (Allopathic & Osteopathic Physicians).
- Where is Subhransu Ray located?
- Subhransu Ray's practice location on file with NPPES is 365 Lennon Ln Ste 250, Walnut Creek, CA 94598-5915.
- What is Subhransu Ray's phone number?
- The practice phone number listed in the NPPES registry for Subhransu Ray is (925) 943-6800.
- Does Subhransu Ray accept Medicare?
- Subhransu Ray is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Subhransu Ray's NPI active?
- Yes — Subhransu Ray's NPI (1578597878) is active in the NPPES registry as of the last update on 2021-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.