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GRACE SHUANG ZHANG MD
NPI 1679501670
Ophthalmology in Santa Rosa, CA

Active since June 29, 2006PECOS EnrolledAccepts Medicare Assignment
1140 SONOMA AVE STE 2A, SANTA ROSA, CA 95405(312) 320-0090 Get Directions Write a Review

NPPES record last updated: March 9, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 9, 2023, Jul 6, 2022, May 9, 2022 and 6 more (9 updates tracked since 2017).

About Grace Shuang Zhang Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GRACE SHUANG ZHANG MD (NPI 1679501670) is an individual ophthalmology provider in Santa Rosa, California, licensed in California (C154185) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS and is a graduate of Other (2002).

NPPES Registry Identity

NPI1679501670
Entity TypeIndividualFemale
Primary Taxonomy207W00000X
Provider Legal NameGRACE SHUANG ZHANGCredential: MD
Location Address1140 SONOMA AVE STE 2ASanta Rosa, CA 95405-4817
Mailing Address1140 Sonoma Ave Ste 2aSanta Rosa, CA 95405-4817 · (312) 320-0090
Phone(312) 320-0090
Sole ProprietorYes
Medical School CMSOtherGraduated 2002
Enumeration DateJune 29, 2006
Last NPPES UpdateMarch 9, 20239 updates tracked since enumeration
NPPES CertifiedMarch 9, 2023
✔ NPI 1679501670 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in CA · C154185
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
1140 SONOMA AVE STE 2A, Santa Rosa, CA 95405
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Grace Shuang Zhang Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2365444742
PECOS Enrollment IDI20180221002197
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

7

Medicare enrollment records show Grace Zhang reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Medical Foundation
0.2 mi
Internal Medicine
500 DOYLE PARK DR, SUITE 303
Santa Rosa, CA 95405
  • Reassigned Medicare billing, California enrollment
  • 1,699 clinicians in this Medicare group
NPI 1740584473 (707) 303-8300
Eye Associates Of Sebastopol Medical Group Inc
7.2 mi
Ophthalmology
6880 PALM AVE
Sebastopol, CA 95472
  • Reassigned Medicare billing, California enrollment
  • 11 clinicians in this Medicare group
NPI 1295729382 (707) 823-7628
Permanente Medical Group Inc
33 mi
Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1336222397 (707) 651-1000
Sutter Bay Medical Foundation
48 mi
Multi-Specialty
12 CAMINO ENCINAS
Orinda, CA 94563
  • Reassigned Medicare billing, California enrollment
  • 4,479 clinicians in this Medicare group
NPI 1366898538 (510) 204-8180
Ukiah Adventist Hospital
56 mi
General Acute Care Hospital
275 HOSPITAL DR
Ukiah, CA 95482
  • Reassigned Medicare billing, California enrollment
  • 221 clinicians in this Medicare group
NPI 1235120676 (707) 463-7360
County Of Santa Clara
76 mi
Clinic/Center
2741 MIDDLEFIELD RD
Palo Alto, CA 94306
  • Reassigned Medicare billing, California enrollment
  • 2,460 clinicians in this Medicare group
NPI 1285228080 (408) 885-5000
Scott & White Clinic
1,505 mi
Internal Medicine
3500 GASTON AVE
Dallas, TX 75246
  • Reassigned Medicare billing, Texas enrollment
  • 2,795 clinicians in this Medicare group
NPI 1649820796 (214) 820-1933

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Measurement of corneal curvature and depth of eye 92136
This procedure measures the shape and depth of your eye, specifically the cornea, the clear front surface. It helps in diagnosing conditions, planning for surgeries, or fitting contact lenses. It's non-invasive and painless.
233 services179 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
218 services188 patients
Removal of cataract with insertion of prosthetic lens 66984
This is a procedure where a cloudy lens in your eye, known as a cataract, is removed. After removal, a clear artificial lens is inserted. This helps to restore your vision, enabling you to see clearly again.
172 services133 patients
Imaging of retina 92134
Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.
127 services126 patients
Established patient complete exam of visual system 92014
An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.
57 services56 patients
Complex removal of cataract with insertion of prosthetic lens 66982
This procedure involves removing a cloudy lens (cataract) from your eye and replacing it with a clear, artificial lens. It helps restore vision that has been affected by the cataract. The operation is usually done under local anesthesia.
45 services40 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95405 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.00 typical visit price
range $63.04 – $187.01
Typical copayment $35.50 (range $15.76 – $46.75)
Most-billed visit code 99204
Established Patient
$77.94 typical visit price
range $21.02 – $153.40
Typical copayment $19.48 (range $5.25 – $38.35)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GRACE ZHANG MD OPHTHALMOLOGY
Clinic/Center (Ophthalmologic Surgery)
1140 SONOMA AVE STE 2A
SANTA ROSA, CA 95405
Sonoma County (707) 404-3081

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Grace Zhang's NPI number?

The NPI number for Grace Zhang is 1679501670. It was assigned to this individual provider in the NPPES registry on June 29, 2006.

Where is Grace Zhang located?

Grace Zhang practices at 1140 Sonoma Ave Ste 2A, Santa Rosa, CA 95405. The listed phone number is (312) 320-0090.

What is Grace Zhang's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Grace Zhang enrolled in Medicare?

Yes. Grace Zhang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Grace Zhang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Grace Zhang reassigns Medicare benefits to 7 organizations: Providence Medical Foundation (Santa Rosa, CA), Eye Associates Of Sebastopol Medical Group Inc (Sebastopol, CA), Permanente Medical Group Inc (Vallejo, CA), Sutter Bay Medical Foundation (Orinda, CA), Ukiah Adventist Hospital (Ukiah, CA) and 2 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Grace Zhang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Grace Zhang accept?

Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list Grace Zhang as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Grace Zhang was last updated on March 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.