Mark Koenen, MD
Psychiatry Physician · Seattle, WA
Mark Koenen, MD is a psychiatry physician with a practice address in Seattle, Washington, and NPI 1649414301, issued on Apr 26, 2009. Check the license (Washington MD00041348, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Mark Koenen
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- MD00041348 WA
A106795 CA
Self-reported in NPPES; status is on the state search - Practice location
- 601 Union St, Seattle, WA 98101
- Phone
- (206) 623-1949
- Enumerated
- Apr 26, 2009
- Record last updated
- Apr 14, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,195 in Washington → Look up another NPI →
Also registered at 601 Union St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lydia Bartholomew, MDFamily Medicine Physician1043396849
- Christopher Bundy, MDPsychiatry Physician1265636054
- Jack Conway, M.D.Psychiatry Physician1861533895
- Craig Smart, M.D.Psychiatry Physician1205974490
- Brad Thompson, LA.C, LMPAcupuncturist1922253012
Verify Mark Koenen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00041348Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average psychiatry physician in 2024
233 Medicare Part D claims for 13 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Clozapine44 claims
- Escitalopram Oxalate27 claims
- Mirtazapine25 claims
- Quetiapine Fumarate Er18 claims
- Lithium Carbonate17 claims
- Clonazepam16 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.
Mark Koenen among 1,195 psychiatry physician records in Washington
Mark Koenen, MD is one of 1,195 psychiatry physician records with a practice address in Washington. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 64% of them.
- NPI issued2009 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileNo · 39% of these records are
- Record last updated2010 · 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 2084P0800X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
485 psychiatry physician records list a practice address in Seattle
They are 485 of the 41,956 NPPES records with a practice address in Seattle, and 1,195 psychiatry physician records in Washington.
All 1,195 in Washington → Every provider in Seattle → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Karen Berlin, MDSeattle, WA 981011740346261
- Ann Branchaud, M.D.Seattle, WA 981011285681254
- Roy Clark, MDSeattle, WA 981011003965419
- Christpher Dattan, M.D.Seattle, WA 981011366593204
- Mark Everard, MDSeattle, WA 981011689620320
- Timothy Forslund, MDSeattle, WA 981011750471496
- Marty Hoiness, MDSeattle, WA 981011902817703
- David Kersey, M.D.Seattle, WA 981011932278348
Common questions
What is Mark Koenen, MD's NPI number?
Mark Koenen, MD's National Provider Identifier (NPI) is 1649414301, issued on Apr 26, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Koenen, MD located?
The NPPES record lists a practice address at 601 Union St, Seattle, WA, 98101. Phone: (206) 623-1949. Providers update this record themselves, so call before visiting.
How can I verify Mark Koenen, MD's license?
NPPES lists Washington license number MD00041348, 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 Mark Koenen, MD prescribe under Medicare Part D?
In 2024, Mark Koenen, MD had 233 Medicare Part D claims for 13 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.