Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

John Kronick, MD

Individual provider Orthopaedic Surgery Physician · NPI 1639129034

John Kronick, MD practises Orthopedic Surgery in Walnut Creek, California. Graduated from R Franklin University of Med & SCI/Chicago Medical School in 1990, 36 years ago. Practices with Golden State Orthopedics and Spine, a 190-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
36
Trained at
R Franklin University of Med & SCI/Chicago Medical School
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2625 Shadelands Dr
Walnut Creek, CA 94598-2512
Phone: (925) 939-8585
Fax: (925) 933-2709
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 101 Sand Creek Rd Ste A, Brentwood, CA 94513-2539 — (925) 939-8585

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence G79932 (CA)

Record details

NPI number1639129034
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 10, 2006
Last updated in NPPESNovember 12, 2025
Certification dateNovember 12, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolR FRANKLIN UNIVERSITY OF MED & SCI/CHICAGO MEDICAL SCHOOL
Graduated 1990 (36 years in practice)
Group practice Golden State Orthopedics And Spine — 190 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Knee replacement 96 times · 92nd percentile
Hip replacement 39 times · 82nd percentile
Lower limb (leg) arthroscopy (minimally invasive joint repair) 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients589
Services billed 2,512 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $58 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Golden State Orthopedics and Spine

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 190 clinicians in the practice; 12 are shown here.

Other providers in Walnut Creek