Richard Derrick Knowles, MD
Family Medicine Physician · Vancouver, WA
Richard Derrick Knowles, MD is a family medicine physician with a practice address in Vancouver, Washington, and NPI 1225113236, issued on Oct 26, 2006. Check the license (Washington MD00042903, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Richard Derrick Knowles
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- MD00042903 WA
MD195896 OR
Self-reported in NPPES; status is on the state search - Practice location
- 2101 NE 139TH St Ste 450, Vancouver, WA 98686
- Phone
- (360) 487-4848
- Enumerated
- Oct 26, 2006
- Record last updated
- Aug 5, 2026
- Medicare enrollment
- Enrolled (PECOS I20250226003247); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 2101 NE 139TH St Ste 450
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Malekooti, DOFamily Medicine Physician1003444324
- Miranda Maring, NPNurse Practitioner1548021199
- Joseph Rapp, PHARMDPharmacist1942011028
- Mindy Seybold, DNP, ARNP, FNP-CFamily Nurse Practitioner1386146686
- Christopher Stamatakos, PA-CPhysician Assistant1326068792
Verify Richard Derrick Knowles in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00042903Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average family medicine physician in 2024
2,310 Medicare Part D claims for 254 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 208 claims were for opioids.
Most prescribed
- Atorvastatin Calcium100 claims
- Losartan Potassium93 claims
- Hydrocodone-Acetaminophen78 claims
- Lisinopril75 claims
- Trazodone Hcl50 claims
- Sertraline Hcl48 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): 87.8 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).
Bills Medicare through one group practice
- Sea Mar Community Health CentersMount Vernon, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Richard Derrick Knowles among 5,534 family medicine physician records in Washington
Richard Derrick Knowles, MD is one of 5,534 family medicine physician records with a practice address in Washington. 73% 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, 58% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2001 · median 2009 among the 3,294 with a school on file
- Record last updated2026 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
242 family medicine physician records list a practice address in Vancouver
They are 242 of the 10,772 NPPES records with a practice address in Vancouver, and 5,534 family medicine physician records in Washington.
All 5,534 in Washington → Every provider in Vancouver → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Cynthia Carlson, MDVancouver, WA 986861790862084
- Richard Carroll, D.O.Vancouver, WA 986861619966744
- Jeremy Chrisman, DOVancouver, WA 986861689784464
- Jeffrey Ford, M.D.Vancouver, WA 986861750478558
- Stephen Greaney, M.D.Vancouver, WA 986861457308546
- James Heid, MDVancouver, WA 986861336165919
- Lynne Heidsiek, M.D.Vancouver, WA 986861285745406
- Rebecca Hoffman, MDVancouver, WA 986861447225685
Common questions
What is Richard Derrick Knowles, MD's NPI number?
Richard Derrick Knowles, MD's National Provider Identifier (NPI) is 1225113236, issued on Oct 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard Derrick Knowles, MD located?
The NPPES record lists a practice address at 2101 NE 139TH St Ste 450, Vancouver, WA, 98686. Phone: (360) 487-4848. Providers update this record themselves, so call before visiting.
How can I verify Richard Derrick Knowles, MD's license?
NPPES lists Washington license number MD00042903, 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 Richard Derrick Knowles, MD prescribe under Medicare Part D?
In 2024, Richard Derrick Knowles, MD had 2,310 Medicare Part D claims for 254 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Richard Derrick Knowles, MD's MIPS final score?
The 2023 MIPS final score is 87.8 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.