Derek J. Peacock, MD
Rheumatology Physician · Richland, WA
Derek J. Peacock, MD is a rheumatology physician with a practice address in Richland, Washington, and NPI 1720085038, issued on Jun 30, 2005. Check the license (Washington MD00036578, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Derek J. Peacock
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- MD00036578 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1305 Fowler St Ste 1D, Richland, WA 99352
- Phone
- (509) 940-2284
- Enumerated
- Jun 30, 2005
- Record last updated
- Sep 18, 2025
- Medicaid ID
- 8477630 WA
- Medicare enrollment
- Enrolled (PECOS I20100921000101); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 200 in Washington → Look up another NPI →
Also registered at 1305 Fowler St Ste 1D
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeannette Hart, PA-CPhysician Assistant1962753830
Verify Derek J. Peacock in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00036578Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Pnw Arthritis And Rheumatology PLLCRichland, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek J. Peacock among 200 rheumatology physician records in Washington
Derek J. Peacock, MD is one of 200 rheumatology physician records with a practice address in Washington. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1981 · median 2005 among the 123 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Washington
There are 200 rheumatology physician records in Washington.
All 200 in Washington → Every provider in Richland → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Katherine Perry, M.D.Richland, WA 993521154302404
- Hebatalla Allam, M.D.Kennewick, WA 993361033566336
- Aveena Gurung, MDKennewick, WA 993361699296491
- Sandra Horvath-Dori, M.D.Kennewick, WA 993361689666927
- Jaspreet Kaler, M.D.Kennewick, WA 993361558745083
- John McCormick, M.D.Kennewick, WA 993361770590556
- David Sandoval, MDKennewick, WA 993361003872094
- Sophia Chang, M.D.Pasco, WA 993011588658074
Common questions
What is Derek J. Peacock, MD's NPI number?
Derek J. Peacock, MD's National Provider Identifier (NPI) is 1720085038, issued on Jun 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Derek J. Peacock, MD located?
The NPPES record lists a practice address at 1305 Fowler St Ste 1D, Richland, WA, 99352. Phone: (509) 940-2284. Providers update this record themselves, so call before visiting.
How can I verify Derek J. Peacock, MD's license?
NPPES lists Washington license number MD00036578, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.