Bruce A. Bonsack, MD
Internal Medicine Physician · Seattle, WA
Bruce A. Bonsack, MD is an internal medicine physician with a practice address in Seattle, Washington, and NPI 1225113566, issued on Oct 26, 2006. Check the license (Washington MD00035570, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Bruce A. Bonsack
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD00035570 WA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 California Ave SW, Seattle, WA 98116
- Phone
- (206) 320-3399
- Enumerated
- Oct 26, 2006
- Record last updated
- Feb 6, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (206) 320-5506
- Medicare enrollment
- Enrolled (PECOS I20050706000758); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 3400 California Ave SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brianna Clark, NPStudent in an Organized Health Care Education/Training Program1730970682
- Monika Cox, MDFamily Medicine Physician1881806578
- David Esquinasi, MSPTOrthopedic Physical Therapist1518021427
- Stephanie Feifs, FNP, ARNPFamily Nurse Practitioner1386662245
- Stephanie Greene, MS, PTPhysical Therapist1811148299
- Rachel Kopicki, M.D.Family Medicine Physician1184078594
Verify Bruce A. Bonsack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00035570Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% more Medicare Part D claims than the average internal medicine physician in 2024
5,481 Medicare Part D claims for 459 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 102 claims were for opioids.
Most prescribed
- Atorvastatin Calcium491 claims
- Lisinopril303 claims
- Amlodipine Besylate296 claims
- Levothyroxine Sodium217 claims
- Losartan Potassium217 claims
- Eliquis136 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.
Bills Medicare through 3 group practices
- Select Outpatient Services IncGlenview, IL
- Select Rehabilitation, LLCGlenview, IL
- Swedish Health ServicesSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
821 internal medicine physician records list a practice address in Seattle
They are 821 of the 41,956 NPPES records with a practice address in Seattle, and 3,079 internal medicine physician records in Washington.
All 821 in Seattle → All 3,079 in Washington → Every provider in Seattle →
Other internal medicine physician records in Washington
- Sheida Aalami, M.D.Seattle, WA1730573296
- Gloria AbacanProsser, WA1316040298
- Ahmad Abadullah, MDUniversity Place, WA1225005721
- Rebecca AbaySeattle, WA1528565520
- Naseer Abbas, MDTacoma, WA1962769380
- James Abbey, M.D.Anacortes, WA1447646039
- Joel Abbott, D.O.Tacoma, WA1477752723
- Paul Abdallah, MDSeattle, WA1639166119
- Abir Abdel-Kader, MDRichland, WA1649407081
- Hussein Abdille, MDSeattle, WA1588368831
Common questions
What is Bruce A. Bonsack, MD's NPI number?
Bruce A. Bonsack, MD's National Provider Identifier (NPI) is 1225113566, issued on Oct 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bruce A. Bonsack, MD located?
The NPPES record lists a practice address at 3400 California Ave SW, Seattle, WA, 98116. Phone: (206) 320-3399. Providers update this record themselves, so call before visiting.
How can I verify Bruce A. Bonsack, MD's license?
NPPES lists Washington license number MD00035570, 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 Bruce A. Bonsack, MD prescribe under Medicare Part D?
In 2024, Bruce A. Bonsack, MD had 5,481 Medicare Part D claims for 459 beneficiaries; 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.