DR. RONALD CHAN (M.D.) – Diagnostic Radiology Physician, NPI 1154367993
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,793 DIAGNOSTIC RADIOLOGY in CA
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Provider Addresses for DR. RONALD CHAN (M.D.)
2125, Oak Grove Road, Shadelands Business Park, Walnut Creek, Contra Costa County, California, 95498, United States
SUITE 200
WALNUT CREEK, CA 945982536
Phone: (925) 296-7150
Fax: (925) 296-7171
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2024-12-13
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040402001472 | I | Diagnostic Radiology | CA | TBD |
| I20241213001982 | I | Diagnostic Radiology | HI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| A9585 | Injection, gadobutrol, 0.1 ml | 7,435 | 85 | $0 |
| 71045 | X-ray of chest, 1 view | 799 | 714 | $0 |
| 73721 | Mri scan of leg joint without contrast | 295 | 255 | $0 |
| 71046 | X-ray of chest, 2 views | 266 | 259 | $0 |
| 72148 | Mri scan of lower spinal canal without contrast | 241 | 240 | $0 |
Insurance plans in this area (ZIP 94598)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | CA | 71010 | X-ray of chest, 1 view, front | 639 | 591 |
| DIAGNOSTIC RADIOLOGY | CA | 71250 | CT scan chest | 64 | 64 |
| DIAGNOSTIC RADIOLOGY | CA | 73110 | X-ray of wrist, minimum of 3 views | 32 | 31 |
| DIAGNOSTIC RADIOLOGY | CA | 73140 | X-ray of fingers, minimum of 2 views | 15 | 15 |
| DIAGNOSTIC RADIOLOGY | CA | 74177 | CT scan of abdomen and pelvis with contrast | 81 | 80 |
| DIAGNOSTIC RADIOLOGY | CA | 78452 | Nuclear medicine study of vessels of heart using drugs or exercise multiple studies | 17 | 17 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology, Nuclear Medicine | CA | |
| - | CA | |
| - | CA | |
| Diagnostic Radiology | NC | |
| Diagnostic Radiology | CA | |
| Diagnostic Radiology | CA | |
| Diagnostic Radiology | CA | |
| Diagnostic Radiology | CA | |
| Diagnostic Radiology, Interventional Radiology, Diagnostic Radiology | CA | |
| Diagnostic Radiology, Pediatric Medicine | CA |
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