Grace Zhang, MD
NPI 1679501670 · Ophthalmology Physician · Santa Rosa, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grace Zhang, MD is a Ophthalmology Physician provider in Santa Rosa, CA (NPI 1679501670).
Provider details
- NPI number
- 1679501670
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- C154185 (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
19 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
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) |
|---|---|---|
| Measurement of Corneal Curvature and Depth of Eye92136 | 233 | $30 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 218 | $65 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 172 | $548 |
| Imaging of Retina92134 | 127 | $25 |
| Established Patient Complete Exam of Visual System92014 | 57 | $75 |
| Complex Removal of Cataract With Insertion of Prosthetic Lens66982 | 45 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketorolac Tromethamine | 141 | 94 |
| Prednisolone Acetate | 125 | 97 |
| Ciprofloxacin Hcl | 100 | 82 |
| Latanoprost | 38 | 16 |
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 no Part D record, 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.
$1,601 across 22 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
- 2006-06-29
- Last updated
- 2023-03-09
- Certified
- 2023-03-09
Frequently asked questions
- What is Grace Zhang's NPI number?
- Grace Zhang's National Provider Identifier (NPI) is 1679501670, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grace Zhang's specialty?
- Grace Zhang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Grace Zhang located?
- Grace Zhang's practice location on file with NPPES is 1140 Sonoma Ave Ste 2a, Santa Rosa, CA 95405-4817.
- What is Grace Zhang's phone number?
- The practice phone number listed in the NPPES registry for Grace Zhang is (312) 320-0090.
- Does Grace Zhang accept Medicare?
- Grace Zhang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grace Zhang's NPI active?
- Yes — Grace Zhang's NPI (1679501670) is active in the NPPES registry as of the last update on 2023-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.