Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Richard Derrick Knowles, MD

Individual provider Family Medicine Physician · NPI 1225113236

Richard Derrick Knowles, MD is registered under Family Practice in Vancouver, Washington. Qualified in 2001, 25 years ago. Practices with Sea Mar Community Health Centers, a 236-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in Oregon and Washington.

Years since qualifying
25
Licensed in
OR, WA
In the registry since
2006
Specialties on file
2
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

2101 NE 139th St Ste 450
Vancouver, WA 98686-2325
Phone: (360) 487-4848
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

  • 440 Nw Division St, Gresham, OR 97030-5506 — (503) 215-9525
  • 406 Se 131st Ave, Vancouver, WA 98683-4004 — (360) 253-2800
  • 3101 Se 192nd Ave Ste 103, Vancouver, WA 98683-1443 — (360) 666-4480
  • 14508 Ne 20th Ave Ste 102, Vancouver, WA 98686-6434 — (360) 852-9670

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD195896 (OR)
Family Medicine Physician Taxonomy 207Q00000X · Licence MD00042903 (WA)

Record details

NPI number1225113236
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 26, 2006
Last updated in NPPESAugust 5, 2026
Certification dateAugust 5, 2026

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Sea Mar Community Health Centers — 236 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times
Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients252
Services billed 1,945 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $17 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Sea Mar Community Health Centers

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 236 clinicians in the practice; 12 are shown here.

Other providers in Vancouver