Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Derek J Peacock, MD

Individual provider Rheumatology Physician · NPI 1720085038

Derek J Peacock, MD is a Rheumatology in Richland, Washington. Qualified in 1981, 45 years ago. Practices with Pnw Arthritis and Rheumatology PLLC, a 3-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
45
Licensed in
WA
In the registry since
2005
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

1305 Fowler St Ste 1D
Richland, WA 99352-4719
Phone: (509) 940-2284
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence MD00036578 (WA)

Record details

NPI number1720085038
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 30, 2005
Last updated in NPPESSeptember 18, 2025
Certification dateSeptember 18, 2025
Mailing address1305 Fowler St Ste 1d, Richland, WA 99352-4719

Medicare enrollment

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

Medicare specialtyRHEUMATOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1981 (45 years in practice)
Group practice Pnw Arthritis And Rheumatology Pllc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Richland