De-Ann R. Williams, M.D.
Rheumatology Physician · Yakima, WA
De-Ann R. Williams, M.D. is a rheumatology physician with a practice address in Yakima, Washington, and NPI 1699114843, issued on Jun 20, 2013. Check the license (Washington MD60803850, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- De-Ann R. Williams
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- MD60803850 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1470 N 16TH Ave, Yakima, WA 98902
- Phone
- (509) 574-6000
- Enumerated
- Jun 20, 2013
- Record last updated
- Oct 22, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (509) 225-2714
- Medicare enrollment
- Enrolled (PECOS I20180810000180); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 200 in Washington → Look up another NPI →
Also registered at 1470 N 16TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisa Benoit, ARNPNurse Practitioner1144304692
- Joel Buffum, MS, ATL, ATCAthletic Trainer1396081923
- Lillian Cassidy, LMPMassage Therapist1033171863
- Chin-Hen Chang, MDPhysical Medicine & Rehabilitation Physician1275154205
- Corie Koreski, PTAPhysical Therapy Assistant1770954562
- Biju Kunhiraman, MDEndocrinology, Diabetes & Metabolism Physician1740221506
Verify De-Ann R. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60803850Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,681 Medicare Part D claims for 260 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Methotrexate261 claims
- Prednisone167 claims
- Hydroxychloroquine Sulfate161 claims
- Humira(Cf) Pen153 claims
- Leflunomide128 claims
- Enbrel Sureclick75 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $18.63
1 payment: food and beverage; the largest payer was Ucb, Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Yakima Valley Memorial PhysiciansYakima, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
De-Ann R. Williams among 200 rheumatology physician records in Washington
De-Ann R. Williams, M.D. 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 2013, is newer than 76% of them.
- NPI issued2013 · 76% of these records are older, 22% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2007 · median 2005 among the 123 with a school on file
- Record last updated2019 · 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 Yakima → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Timothy Rinden, D.O.Yakima, WA 989021710419775
- Stephen Shaul, M.D.Yakima, WA 989021346226339
- Kelly Timmons, M.D. PHDYakima, WA 989021417943630
- James Byrd, M.D., PH.D.Wenatchee, WA 988011679699748
- Nina Flavin, M.D.Wenatchee, WA 988011538379458
- Kevin Lammert, MDWenatchee, WA 988011700240918
- John Newton, MDWenatchee, WA 988011770509788
- Uzma Khan, MDVancouver, WA 986831992746432
Common questions
What is De-Ann R. Williams, M.D.'s NPI number?
De-Ann R. Williams, M.D.'s National Provider Identifier (NPI) is 1699114843, issued on Jun 20, 2013. An NPI identifies a provider in billing; it is not a license.
Where is De-Ann R. Williams, M.D. located?
The NPPES record lists a practice address at 1470 N 16TH Ave, Yakima, WA, 98902. Phone: (509) 574-6000. Providers update this record themselves, so call before visiting.
How can I verify De-Ann R. Williams, M.D.'s license?
NPPES lists Washington license number MD60803850, 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.
How much does De-Ann R. Williams, M.D. prescribe under Medicare Part D?
In 2024, De-Ann R. Williams, M.D. had 1,681 Medicare Part D claims for 260 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is De-Ann R. Williams, M.D.'s MIPS final score?
The 2023 MIPS final score is 88.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.