Quick answers
- Which hospitals does Derek J. Peacock work at?
- Medicare's official clinician data lists Derek J. Peacock at 5 hospitals: Good Shepherd Medical Center, Kadlec Regional Medical Center, Lourdes Medical Center, Providence St Mary Medical Center and Yakima Valley Memorial. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Derek J. Peacock see patients?
- Medicare's clinician data lists 2 practice locations, including Richland, WA. Call before your visit to confirm the address.
- What is Derek J. Peacock's specialty?
- Medicare lists Rheumatology as the primary specialty, and also Internal Medicine.
- Does Derek J. Peacock accept Medicare assignment?
- Yes. Medicare's clinician data says Derek J. Peacock 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 J. Peacock?
- (509) 528-1866, as listed in official Medicare / NPI Registry data.
- What is Derek J. Peacock's NPI number?
- 1720085038. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Derek J. Peacock works
Medicare's Facility Affiliation Data lists Derek J. Peacock at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Good Shepherd Medical CenterHermiston, OR · Critical Access Hospital · CCN 381325
- Kadlec Regional Medical CenterRichland, WA · Acute Care Hospital · CCN 500058
- Lourdes Medical CenterPasco, WA · Critical Access Hospital · CCN 501337
- Providence St Mary Medical CenterWalla Walla, WA · Acute Care Hospital · CCN 500002
- Yakima Valley MemorialYakima, WA · Acute Care Hospital · CCN 500036
Practice locations
Addresses where Derek J. Peacock is enrolled with Medicare (CMS data updated 2026-10-02).
- 1305 Fowler StRichland, WA 99352
- 1305 Fowler St, Suite 1dRichland, WA 99352 (509) 528‑1866
Group practices
Medicare enrollment lists Derek J. Peacock as a member of this group (CMS data updated 2026-10-02).
- PNW Arthritis and Rheumatology PLLC3 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in Washington
Clinicians with the same Medicare primary specialty in Washington — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720085038 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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