John Zink, MD
NPI 1366628935 · Surgery Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Zink, MD is a Surgery Physician provider in Walnut Creek, CA (NPI 1366628935).
Provider details
- NPI number
- 1366628935
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A124639 (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
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
423 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 119 | $86 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 83 | $190 |
| Critical Care, First 30-74 Minutes99291 | 75 | $220 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 30 | $129 |
| Limited Ultrasound Scan Behind Abdominal Cavity76775 | 27 | $29 |
| Ultrasound Scan of Chest76604 | 26 | $27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17,092 across 39 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
Additional practice locations (1)
- 365 Lennon Ln#250Walnut Creek, CA 94598-5910Phone: (925) 932-6330
Registry dates
- Enumerated
- 2008-01-14
- Last updated
- 2025-02-07
- Certified
- 2025-02-07
Frequently asked questions
- What is John Zink's NPI number?
- John Zink's National Provider Identifier (NPI) is 1366628935, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Zink's specialty?
- John Zink is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is John Zink located?
- John Zink's practice location on file with NPPES is 2637 Shadelands Dr, Walnut Creek, CA 94598-2512.
- What is John Zink's phone number?
- The practice phone number listed in the NPPES registry for John Zink is (925) 932-6330.
- Does John Zink accept Medicare?
- John Zink is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Zink's NPI active?
- Yes — John Zink's NPI (1366628935) is active in the NPPES registry as of the last update on 2025-02-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.