Dr. Grace Shuang Zhang, MD

  • Ukiah, CA
  • Ophthalmologist
NPI1679501670PAC ID2365444742
Medicare services, 2024
938
Medicare patients, 2024
306
Part D claims, 2024
473
Publications
3
Hospital affiliations
1
Practice address
275 Hospital Drive, Ukiah, CA 95482
Practice phone
Call (707) 462-3111
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Adventist Health Ukiah Valley

Hospital · Ukiah, California

See all 12 affiliations

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Dr. Grace Shuang Zhang is an ophthalmologist in Ukiah, California

Dr. Zhang practices at Adventist Health Ukiah Valley in Ukiah, California, part of Adventist Health.

Dr. Zhang's NPI, 1679501670, was assigned on June 29, 2006. Dr. Zhang graduated from Baylor College Of Medicine in 2002. Dr. Zhang holds California license C154185.

NPI and contact details
Medicare PAC ID
2365444742
NPI enumeration date
June 29, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(707) 462-3111
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Female
Estimated age
50
Medical school graduation
2002

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Grace Shuang Zhang practices at Adventist Health Ukiah Valley in Ukiah, California

Dr. Zhang's primary practice is Adventist Health Ukiah Valley, at 275 Hospital Drive, Ukiah, CA 95482 in Mendocino County. The practice phone is (707) 462-3111.

Source: Dmand AI Affiliation Data

Dr. Grace Shuang Zhang is affiliated with 4 sites of care and 8 medical groups

Dr. Zhang's primary practice is Adventist Health Ukiah Valley in Ukiah, California, part of Adventist Health. The medical group on file is Adventist Health Physicians Network. Dmand AI also links Dr. Zhang to 7 more medical groups and 3 group practices and clinics, each named with a free account.

See all 12 affiliations for Dr. Zhang

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Grace Shuang Zhang's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zhang practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Adventist Health Ukiah ValleyAvailable with a free account
+3 more sites and 7 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Grace Shuang Zhang is one of 2,621 ophthalmologists in California

Ophthalmology is Dr. Zhang's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Zhang is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Zhang's licenses on file in 8 states: California, Washington, Texas, Florida, Michigan, Georgia, Illinois and Indiana.

Specialties and state licenses

  • Ophthalmology, CaliforniaPrimaryLicense C154185 · 2018 to 2027 · taxonomy 207W00000X
  • Washington license
  • Texas license2015 to 2020
  • Florida license2008 to 2019
  • Michigan license2006 to 2019
  • Georgia license2017 to 2018
  • Illinois license2003 to 2011
  • Indiana license2006 to 2007

Clinical focus

Dmand AI lists age-related macular degeneration, cataract, cataract surgery with lens implant, conjunctivitis, dry eye, eyelid inflammation, glaucoma and hereditary corneal conditions among the conditions Dr. Zhang treats.

Ophthalmologists near Dr. Zhang

Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Grace Shuang Zhang billed Medicare for 938 services in 2024

CMS data shows 938 Medicare services from Dr. Zhang across 10 procedure codes in 2024, for 306 Medicare patients. Medicare paid $123,006 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024938
Medicare patients306
Paid by Medicare$123,006
Procedure codes10

Dr. Zhang's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Tests and treatments
2023: 4792024: 4663%
Office and hospital visits
2023: 2212024: 25515%
Surgery
2023: 1922024: 21713%

Dr. Zhang compared with the California median for ophthalmologists, 2024

  • Dr. Zhang
  • California median
Medicare services
938vs 1,07913% below
Medicare patients
306vs 42127% below
Part D claims
404vs 61835% below

Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.

Dr. Zhang's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Zhang

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zhang and other ophthalmologists in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Grace Shuang Zhang treated 306 Medicare patients in 2024, average age 76

CMS counts 306 Medicare patients who saw Dr. Zhang in 2024. The largest group is 75 to 84, with 131 patients. 65% of them have high blood pressure, and 62% have high cholesterol. 36% are also on Medicaid. Their average risk score is 1.12, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Zhang's median patient age at 76, with 61% women.

Medicare patients, 2024306
Average age76
Average risk score1.12
Also on Medicaid36%

Dr. Zhang's Medicare patients by age, 2024

Dr. Zhang's Medicare patients by sex, 2024

  • Women19162%
  • Men11538%

Chronic conditions among Dr. Zhang's Medicare patients, 2024

  1. High blood pressure65%
  2. High cholesterol62%
  3. Arthritis38%
  4. Diabetes25%
  5. Anxiety20%
  6. Atrial fibrillation17%
  7. Osteoporosis17%
  8. Cancer15%

Share of Medicare patients with each condition. A patient can have several.

Dr. Zhang's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 76

Patient panel by sex, all payers

  • Women61%
  • Men39%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Grace Shuang Zhang wrote 473 Medicare Part D claims in 2024

In 2024, Dr. Zhang wrote 473 Medicare Part D claims for 161 patients. 52% of them were for generic drugs. CMS names the drug for 404 of them, across 4 drugs with 11 or more claims each, at $11,113 in total drug cost. In 2023, CMS named 833 claims across 6 drugs.

Part D claims, 2024473
Drugs named by CMS4
Total drug cost$11,113
Part D patients161

Dr. Zhang's Part D claims by kind of drug, 2024

  • Generic247 claims52%
  • Brand-name226 claims48%

Dr. Zhang's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 8332024: 40452%

Drugs named by CMS: 4 in 2024, 6 in 2023.

See all prescribing by Dr. Zhang

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Grace Shuang Zhang ranks in the 89th percentile for cataract surgery in Medicare

Dr. Zhang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Zhang as offering telehealth. CMS counts 297 procedures of cataract surgery by Dr. Zhang, more than 89% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Where Dr. Zhang ranks in Medicare procedure volume

Cataract surgery
89th percentile297 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Dr. Grace Shuang Zhang has 3 publications on record

Dmand AI links 3 papers to Dr. Zhang. Dr. Zhang's most frequent co-author is Jane N. Winter, MD.

Papers3

Dr. Zhang's most frequent co-authors

Recent publications by Dr. Zhang

See all 3 publications and co-authors

See who Dr. Zhang researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Zhang works with, so you can find a warm path to the right ophthalmologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Grace Shuang Zhang received $4,549 in industry payments from 2016 to 2025

CMS Open Payments shows 49 general payments to Dr. Zhang from 17 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 53% of the total. Johnson & Johnson Surgical Vision, Inc. paid the most, $1,853.

General payments to Dr. Zhang by program year, 2016 to 2025

General payments to Dr. Zhang by kind, 2016 to 2025

$4.5Kin total
  • Travel and lodging$2,41853%
  • Food and beverage$2,02845%
  • Gifts$391%
  • Education$381%
  • Entertainment$271%

Companies that paid Dr. Zhang the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Zhang

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Grace Shuang Zhang has 2 awards and honors on record

Dmand AI lists 2 awards for Dr. Zhang, most recently CMS Stage 1 EHR in 2013.

Awards and honors for Dr. Zhang

  1. 2013
    • CMS Stage 1 EHR
  2. Undated
    • AAO Fellow

Source: Dmand AI Professional Profile Data

Dr. Grace Shuang Zhang graduated from Baylor College Of Medicine

Dr. Zhang graduated from Baylor College Of Medicine in 2002. Dr. Zhang is a member of AAO.

  1. Medical schoolBaylor College Of Medicine
  2. Board certified in ophthalmologyAmerican Board of Ophthalmology

Source: Dmand AI Professional Profile Data

Dr. Grace Shuang Zhang accepts plans from 20 insurance carriers

Dr. Zhang is in network with 20 carriers, including Aetna, Blue Cross Blue Shield of Michigan and HCSC. HMO plans come from the most carriers, 11. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • HCSC
  • United Healthcare
  • Blue Cross Blue Shield of Massachusetts
  • Elevance
  • Humana
  • Alliant Health Plans
  • +12 more carriersWith a free account

Plan types Dr. Zhang accepts, by number of carriers

  1. HMO11
  2. PPO11
  3. Medicare8
  4. POS6
  5. EPO4
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Grace Shuang Zhang's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Grace Shuang Zhang

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Grace Shuang Zhang's NPI number?

Dr. Grace Shuang Zhang's NPI number is 1679501670. It was assigned on June 29, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Grace Shuang Zhang?

Dr. Grace Shuang Zhang is an ophthalmologist in Ukiah, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).

Where does Dr. Grace Shuang Zhang practice?

Dr. Zhang practices at 275 Hospital Drive, Ukiah, CA 95482. Dr. Zhang's primary practice is Adventist Health Ukiah Valley in Ukiah, California, part of Adventist Health. Dmand AI also links Dr. Zhang to 7 medical groups and 3 group practices and clinics.

What is Dr. Grace Shuang Zhang's office phone number?

The practice phone on file for Dr. Zhang is (707) 462-3111.

What is Dr. Grace Shuang Zhang's medical license number?

Dr. Zhang holds California license C154185, one of the licenses on file in 8 states.

Which states has Dr. Grace Shuang Zhang been licensed in?

Dmand AI has state licenses on file for Dr. Zhang in California (2018 to 2027), Washington, Texas (2015 to 2020), Florida (2008 to 2019), Michigan (2006 to 2019), Georgia (2017 to 2018), Illinois (2003 to 2011) and Indiana (2006 to 2007).

Which hospitals is Dr. Grace Shuang Zhang affiliated with?

Dr. Zhang practices at Adventist Health Ukiah Valley in Ukiah, California.

What medical group is Dr. Grace Shuang Zhang part of?

Dr. Zhang is linked to Adventist Health Physicians Network. Dmand AI links Dr. Zhang to 7 more medical groups.

Does Dr. Grace Shuang Zhang accept Medicare?

Yes. CMS data shows Dr. Zhang billed Medicare for 938 services in 2024, and Dr. Zhang accepts Medicare assignment.

Does Dr. Grace Shuang Zhang offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Zhang as offering telehealth services.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Grace Shuang Zhang see?

CMS counts 306 Medicare patients who saw Dr. Zhang in 2024, with an average age of 76.

Is Dr. Grace Shuang Zhang board certified?

Yes. Dr. Zhang is board certified in ophthalmology by the American Board of Ophthalmology.

What services does Dr. Grace Shuang Zhang bill to Medicare?

In 2024, Dr. Zhang's most billed Medicare services were eye exam or test (92136), office visit, established patient (99213) and surgery: eye (66984).

Where did Dr. Grace Shuang Zhang go to medical school?

Dr. Zhang graduated from Baylor College Of Medicine in 2002.

What drugs does Dr. Grace Shuang Zhang prescribe most?

In 2024 Medicare Part D data, Dr. Zhang's most prescribed drugs by claims were Ketorolac Tromethamine, Prednisolone Acetate and Ciprofloxacin HCl.

Has Dr. Grace Shuang Zhang received payments from drug or device companies?

CMS Open Payments shows $4,549 in general payments to Dr. Zhang from 17 companies from 2016 to 2025. The largest total came from Johnson & Johnson Surgical Vision, Inc.

How long has Dr. Grace Shuang Zhang been practicing?

Dr. Zhang graduated from medical school in 2002, 24 years ago.

Does Dr. Grace Shuang Zhang do research?

Dmand AI links 3 publications to Dr. Zhang.

Who does Dr. Grace Shuang Zhang publish with?

Dr. Zhang's most frequent co-authors are Jane N. Winter, MD (1 shared paper).

What insurance does Dr. Grace Shuang Zhang accept?

Dr. Zhang is in network with 20 carriers, including Aetna, Blue Cross Blue Shield of Michigan and HCSC. HMO plans come from the most carriers, 11. Check the plan with the practice before a visit.

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