Dr. John Ulric Zink, MD
- Medicare services, 2024
- 423
- Medicare patients, 2024
- 247
- Part D claims, 2024
- 20
- Publications
- 1
- MIPS score, 2024
- 84
- Practice address
- 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zink's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Ulric Zink is a general surgeon in Walnut Creek, California
Dr. Zink practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.
Dr. Zink's NPI, 1366628935, was assigned on January 14, 2008. Dr. Zink graduated from School of Medicine Columbia in 2007. Dr. Zink holds California license A124639.
- NPI
- 1366628935NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688800386
- NPI enumeration date
- January 14, 2008
- NPI status
- Active
- Practice phone
- (925) 939-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John Ulric Zink practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California
Dr. Zink's primary practice is John Muir Medical Center, Walnut Creek, at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (925) 939-3000.
- John Muir Medical Center, Walnut Creek1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 · Contra Costa CountyPhone(925) 939-3000
Source: Dmand AI Affiliation Data
Dr. John Ulric Zink is affiliated with 10 sites of care and 5 medical groups
Dr. Zink's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dr. Zink is also affiliated with Concord Medical Center. The medical group on file is BASS Medical Group. Dmand AI also links Dr. Zink to 2 more hospitals, 5 group practices and clinics, 4 medical groups and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Ulric Zink's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zink practices, 10 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Medical Center, Walnut Creek | Available with a free account |
| +9 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across John Muir Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Ulric Zink is one of 2,926 general surgeons in California
Surgery is Dr. Zink's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Zink is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Zink's licenses on file in 2 states: California and Texas.
Specialties and state licenses
- Surgery, CaliforniaPrimary
- Texas license
Clinical focus
Dmand AI lists abdominal adhesion surgery, acute gallbladder or bile duct inflammation, appendectomy, chest trauma, collapsed lung, colon removal, gallbladder removal and groin hernia surgery among the conditions Dr. Zink treats.
General surgeons near Dr. Zink
Counts of general surgeons 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. John Ulric Zink billed Medicare for 423 services in 2024
CMS data shows 423 Medicare services from Dr. Zink across 9 procedure codes in 2024, for 247 Medicare patients. Medicare paid $40,091 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Zink's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2802024: 31914%
- Imaging
- 2023: 572024: 7837%
- Tests and treatments
- 2023: 192024: 2637%
Dr. Zink compared with the California median for general surgeons, 2024
- Dr. Zink
- California median
- Medicare services
- 423vs 1662.5 times
- Medicare patients
- 247vs 1212.0 times
- Part D claims
- 13vs 3462% below
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Zink'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.
Need commercial claims for Dr. Zink?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zink and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Ulric Zink treated 247 Medicare patients in 2024, average age 76
CMS counts 247 Medicare patients who saw Dr. Zink in 2024. The largest group is 75 to 84, with 91 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 2.16, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Zink's median patient age at 53, with 41% women.
Dr. Zink's Medicare patients by age, 2024
Dr. Zink's Medicare patients by sex, 2024
- Women12149%
- Men12651%
Chronic conditions among Dr. Zink's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis53%
- Chronic kidney disease43%
- Mood disorders40%
- Depression34%
- Anxiety33%
- Atrial fibrillation32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zink's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women41%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Ulric Zink wrote 20 Medicare Part D claims in 2024
In 2024, Dr. Zink wrote 20 Medicare Part D claims for 15 patients. 100% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $131 in total drug cost.
Dr. Zink's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
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. John Ulric Zink scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Zink for performance year 2024, reported as part of a group. CMS counts 78 procedures of removal of tissue by Dr. Zink, more than 83% of the clinicians it reports for that procedure.
Dr. Zink's MIPS scores, performance year 2024
- 84of 100Final score
- 67.6of 100Quality
- 40of 100Improvement Activities
- 72of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Zink ranks in Medicare procedure volume
- Removal of tissue
- 83rd percentile78 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. John Ulric Zink has 1 publication on record
Dmand AI links 1 paper to Dr. Zink.
Recent publications by Dr. Zink
See who Dr. Zink researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Zink works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Ulric Zink received $22,857 in industry payments from 2017 to 2025
CMS Open Payments shows 64 general payments to Dr. Zink from 6 drug and device companies from 2017 to 2025. Education make up the largest share, 68% of the total. Intuitive Surgical, Inc. paid the most, $19,430.
General payments to Dr. Zink by program year, 2017 to 2025
General payments to Dr. Zink by kind, 2017 to 2025
- Education$15,50068%
- Travel and lodging$5,21523%
- Food and beverage$2,0829%
- Speaker and faculty fees$450%
- Gifts$150%
Companies that paid Dr. Zink the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Ulric Zink graduated from School of Medicine Columbia
Dr. Zink graduated from School of Medicine Columbia in 2007. Dr. Zink is a member of ACS and Eastern Association for the Surgery of Trauma.
- Medical school
- Board certified in surgery
- Board certified in surgical critical care
Source: Dmand AI Professional Profile Data
Dr. John Ulric Zink accepts plans from 16 insurance carriers
Dr. Zink is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Humana
- Regence Health Plans
- +8 more carriersWith a free account
Plan types Dr. Zink accepts, by number of carriers
- Medicare10
- PPO10
- HMO6
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. John Ulric Zink's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Ulric Zink
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. John Ulric Zink's NPI number?
Dr. John Ulric Zink's NPI number is 1366628935. It was assigned on January 14, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. John Ulric Zink?
Dr. John Ulric Zink is a general surgeon in Walnut Creek, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John Ulric Zink practice?
Dr. Zink practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. Dr. Zink's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dmand AI also links Dr. Zink to 2 hospitals, 5 group practices and clinics, 4 medical groups and 1 home health agency.
What is Dr. John Ulric Zink's office phone number?
The practice phone on file for Dr. Zink is (925) 939-3000.
What is Dr. John Ulric Zink's medical license number?
Dr. Zink holds California license A124639, one of the licenses on file in 2 states.
Which states has Dr. John Ulric Zink been licensed in?
Dmand AI has state licenses on file for Dr. Zink in California (2013 to 2026) and Texas (2012 to 2014).
Which hospitals is Dr. John Ulric Zink affiliated with?
Dr. Zink practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California. Dr. Zink is also affiliated with Concord Medical Center. Dmand AI links Dr. Zink to 2 more hospitals.
What medical group is Dr. John Ulric Zink part of?
Dr. Zink is linked to BASS Medical Group. Dmand AI links Dr. Zink to 4 more medical groups.
Does Dr. John Ulric Zink accept Medicare?
Yes. CMS data shows Dr. Zink billed Medicare for 423 services in 2024.
What is Dr. John Ulric Zink's MIPS score?
Dr. Zink's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. John Ulric Zink see?
CMS counts 247 Medicare patients who saw Dr. Zink in 2024, with an average age of 76.
Is Dr. John Ulric Zink board certified?
Yes. Dr. Zink is board certified in surgery by the American Board of Surgery.
What services does Dr. John Ulric Zink bill to Medicare?
In 2024, Dr. Zink's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99223) and critical care (99291).
Where did Dr. John Ulric Zink go to medical school?
Dr. Zink graduated from School of Medicine Columbia in 2007.
What drugs does Dr. John Ulric Zink prescribe most?
In 2022 Medicare Part D data, Dr. Zink's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. John Ulric Zink received payments from drug or device companies?
CMS Open Payments shows $22,857 in general payments to Dr. Zink from 6 companies from 2017 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. John Ulric Zink been practicing?
Dr. Zink graduated from medical school in 2007, 19 years ago.
Does Dr. John Ulric Zink do research?
Dmand AI links 1 publication to Dr. Zink.
What insurance does Dr. John Ulric Zink accept?
Dr. Zink is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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