Active NPI
John Kronick, M.D.
- Orthopaedic Surgery Physician
- Walnut Creek, CA
National Provider Identifier
1639129034
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Orthopaedic Surgery Physician
- License
- G79932
- Practice address
- 2625 Shadelands Dr
Walnut Creek, CA 94598-2512 - Phone
- (925) 939-8585
- Fax
- (925) 933-2709
- NPI assigned
- May 10, 2006
- Last updated
- Nov 12, 2025
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Orthopaedic Surgery Physician | 207X00000X | G79932 | CA | Primary |
Addresses
Primary practice location
2625 Shadelands Dr
Walnut Creek, CA 94598-2512
Mailing address
PO Box 31396
Walnut Creek, CA 94598-8396
Phone (925) 939-8585
Other practice location 1
101 Sand Creek Rd Ste A
Brentwood, CA 94513-2539
Phone (925) 939-8585
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in CA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Orthopedic Surgery
- Education
- R Franklin University of Med & Sci/Chicago Medical School, 1990
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
2405 Shadelands Dr
Walnut Creek, CA 94598-2444
Phone (925) 939-8585
Hospital & facility affiliations
- One Health Home Care, Inc
- John Muir Medical Center - Walnut Creek Campus
- John Muir Medical Center - Concord Campus
- Sutter Delta Medical Center
Merit-based Incentive Payment System (MIPS)
- Final score
- 75 of 100
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Hip replacement | 39 |
| Knee replacement | 96 |
| Lower limb (leg) arthroscopy (minimally invasive joint repair) | 1-10 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 79932 | CA | MD | Pharmacist |
| G79932 | CA | MD | Orthopaedic Surgery Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| John Muir Trauma Physicians Billing Service | Current | Accepting new patients | |
| Golden State Orthopedics & Spine | Orthopaedic Surgery | Past | Accepting new patients |
Locations
1601 Ygnacio Valley Rd
Walnut Creek, CA 94598
Phone (925) 295-1545
Interoperability endpoints
- john.kronick@direct.muirortho.nextgenshare.com
Organizations & group practices 3
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
-
- Orthopaedic Surgery Physician
- Walnut Creek, CA
- NPI 1972552990
-
- Hospitalist Physician
- Walnut Creek, CA
- NPI 1093864837
-
- Orthopaedic Surgery Physician
- San Francisco, CA
- NPI 1457004897
Hospital & facility affiliations 4
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
dba John Muir Health, Walnut Creek Medical Center
- General Acute Care Hospital
- Walnut Creek, CA
- NPI 1740215219
-
dba John Muir Health Medical Center, Concord Campus
- General Acute Care Hospital
- Concord, CA
- NPI 1801821376
-
dba One Health Hospice & Home Health
- Home Health Agency
- Livermore, CA
- NPI 1730616624
-
dba Sutter Delta Medical Center
- General Acute Care Hospital
- Antioch, CA
- NPI 1467808659
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1147219200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1762905600000",
"number": "1639129034",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 31396",
"city": "WALNUT CREEK",
"state": "CA",
"postal_code": "945988396",
"telephone_number": "925-939-8585",
"fax_number": "925-933-2709"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "2625 SHADELANDS DR",
"city": "WALNUT CREEK",
"state": "CA",
"postal_code": "945982512",
"telephone_number": "925-939-8585",
"fax_number": "925-933-2709"
}
],
"practiceLocations": [
{
"address_1": "101 Sand Creek Rd Ste A",
"address_purpose": "LOCATION",
"city": "Brentwood",
"state": "CA",
"postal_code": "945132539",
"country_code": "US",
"telephone_number": "925-939-8585",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "KRONICK",
"first_name": "JOHN",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-05-10",
"last_updated": "2025-11-12",
"certification_date": "2025-11-12",
"status": "A"
},
"taxonomies": [
{
"code": "207X00000X",
"taxonomy_group": "",
"desc": "Orthopaedic Surgery",
"state": "CA",
"license": "G79932",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Walnut Creek, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 12, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.