Quick answers
- Where does Derek Grady see patients?
- Medicare's clinician data lists 3 practice locations, including Colusa, CA, Tamuning, GU and San Andreas, CA. Call before your visit to confirm the address.
- What is Derek Grady's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Derek Grady accept Medicare assignment?
- Yes. Medicare's clinician data says Derek Grady accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Derek Grady?
- (530) 458-1808, as listed in official Medicare / NPI Registry data.
- What is Derek Grady's NPI number?
- 1174940027. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Derek Grady is enrolled with Medicare (CMS data updated 2026-10-02).
- 199 E Webster StColusa, CA 95932 (530) 458‑1808
- 548 S Marine Corps DrTamuning, GU 96913 (671) 646‑5825
- 768 Mountain Ranch RdSan Andreas, CA 95249 (209) 754‑3521
Group practices
Medicare enrollment lists Derek Grady as a member of these groups (CMS data updated 2026-10-02).
- Radiologica Inc43 clinicians in the group
- Takecare Insurance Company Inc27 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174940027 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians