Delwyn Richard Baker, MD
Internal Medicine Physician · Walla Walla, WA
Delwyn Richard Baker, MD is an internal medicine physician with a practice address in Walla Walla, Washington, and NPI 1023108297, issued on Oct 16, 2006. Check the license (Washington M4249, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Delwyn Richard Baker
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- M4249 WA
Self-reported in NPPES; status is on the state search - Practice location
- 77 Wainwright Drive, Walla Walla, WA 99362
- Phone
- (509) 525-5200
- Enumerated
- Oct 16, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 77 Wainwright Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert ShererRegistered Nurse1942475165
Verify Delwyn Richard Baker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license M4249Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
115 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Omeprazole16 claims
- Bupropion Xl12 claims
- Hydrochlorothiazide12 claims
- Lisinopril12 claims
- Sertraline Hcl12 claims
- Simvastatin12 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.
Delwyn Richard Baker among 3,079 internal medicine physician records in Washington
Delwyn Richard Baker, MD is one of 3,079 internal medicine physician records with a practice address in Washington. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2007 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
37 internal medicine physician records list a practice address in Walla Walla
They are 37 of the 1,276 NPPES records with a practice address in Walla Walla, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Walla Walla → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kevin Andrews, MDWalla Walla, WA 993621174513873
- Eric Ball, M.D.Walla Walla, WA 993621275507485
- Karen Geheb, M.D.Walla Walla, WA 993621972532745
- Dan Grinstead, M.D.Walla Walla, WA 993621881668010
- Philip Hooper, MDWalla Walla, WA 993621154307742
- Eric Jauhiainen, M.D.Walla Walla, WA 993621235103466
- Stevie Mazyck, MDWalla Walla, WA 993621902835697
- Patricia McIlvaine, M.D.Walla Walla, WA 993621689648594
Common questions
What is Delwyn Richard Baker, MD's NPI number?
Delwyn Richard Baker, MD's National Provider Identifier (NPI) is 1023108297, issued on Oct 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Delwyn Richard Baker, MD located?
The NPPES record lists a practice address at 77 Wainwright Drive, Walla Walla, WA, 99362. Phone: (509) 525-5200. Providers update this record themselves, so call before visiting.
How can I verify Delwyn Richard Baker, MD's license?
NPPES lists Washington license number M4249, 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 Delwyn Richard Baker, MD prescribe under Medicare Part D?
In 2024, Delwyn Richard Baker, MD had 115 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.