Grace Shuang Zhang, MD
NPI 1679501670ActiveIndividual· Ophthalmology· Santa Rosa, CA
Ophthalmology (MD) with Sutter Bay Medical Foundation and 1 other group, practicing in Santa Rosa, California. In 2024 Medicare paid $136,048 for 306 patients, and Part D covered 473 of their prescriptions, 52% of them generic. Rayner Intraocular Lenses Limited was the largest of 3 companies reporting payments in 2025, $69.33 in all, mostly food and beverage. Lists Adventist Health Ukiah Valley as a hospital affiliation.
Overview
| NPI | 1679501670 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jun 29, 2006 |
| Last updated in NPPES | Mar 9, 2023 |
| Certified by provider | Mar 9, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | C154185 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (CA); Practitioner - Ophthalmology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 306 |
|---|---|
| Services billed | 1,025 across 29 procedure codes |
| Paid by Medicare | $136,048 |
Part D prescriptions in 2024
| Prescriptions (claims) | 473 · 579 30-day fills |
|---|---|
| Patients | 161 |
| Total drug cost | $17,512 |
| Generic share | 52% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Ophthalmology |
| Telehealth | Offers telehealth |
Medical groups
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
- Ukiah Adventist HospitalUkiah, CA · 135 clinicians
Hospital affiliation
- Adventist Health Ukiah ValleyUkiah, CA
Industry payments (Open Payments)
- 2025$69.33 · 3 payments from 3 companies
- 2024$1,601 · 22 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Rayner Intraocular Lenses Limited | $26.26 | 1 |
| Dompe US, Inc. | $22.69 | 1 |
| Alcon Vision LLC | $20.38 | 1 |
What the 2025 payments were for
- Food and Beverage$69.33 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 43 ophthalmologists in Santa Rosa · All ophthalmologists in California