Kenneth N. Mahrer, MD
Cardiovascular Disease Physician · Seattle, WA
Kenneth N. Mahrer, MD is a cardiovascular disease physician with a practice address in Seattle, Washington, and NPI 1013989979, issued on Feb 6, 2006. Check the license (Washington MD00033066, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Kenneth N. Mahrer
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- MD00033066 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 9TH Ave, Seattle, WA 98101
- Phone
- (206) 223-6600
- Enumerated
- Feb 6, 2006
- Record last updated
- Jun 17, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 8180978 WA
- Medicare enrollment
- Enrolled (PECOS I20081128000010); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 512 in Washington → Look up another NPI →
Also registered at 1100 9TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Deborah Abrams, M.D.Hematology & Oncology Physician1902974835
- Alvin Aceron, ARNPAdult Health Nurse Practitioner1639488562
- Ream AdeebAdult Health Nurse Practitioner1760868855
- Steven Adler, MDDiagnostic Ultrasound Physician1639108046
Verify Kenneth N. Mahrer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00033066Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
673 Medicare Part D claims for 163 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Metoprolol Tartrate74 claims
- Atorvastatin Calcium72 claims
- Metoprolol Succinate64 claims
- Losartan Potassium57 claims
- Ezetimibe41 claims
- Furosemide34 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 one group practice
- Permanente Medical Group IncSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kenneth N. Mahrer among 512 cardiovascular disease physician records in Washington
Kenneth N. Mahrer, MD is one of 512 cardiovascular disease 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, 46% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1988 · median 2002 among the 351 with a school on file
- Record last updated2008 · 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 207RC0000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Washington
There are 512 cardiovascular disease physician records in Washington.
All 512 in Washington → Every provider in Seattle → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Matthew Andersen, PASeattle, WA 981011669444774
- Elizabeth Davis, ARNPSeattle, WA 981011295707313
- Jo-Ana Dolojan, ARNPSeattle, WA 981011659344109
- Elizabeth GoldSeattle, WA 981011801851274
- John Graber, MDSeattle, WA 981011942272604
- John Holmes, MDSeattle, WA 981011467425959
- Joseph Knapp, MDSeattle, WA 981011588636492
- Michael Longo, MDSeattle, WA 981011508838467
Common questions
What is Kenneth N. Mahrer, MD's NPI number?
Kenneth N. Mahrer, MD's National Provider Identifier (NPI) is 1013989979, issued on Feb 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth N. Mahrer, MD located?
The NPPES record lists a practice address at 1100 9TH Ave, Seattle, WA, 98101. Phone: (206) 223-6600. Providers update this record themselves, so call before visiting.
How can I verify Kenneth N. Mahrer, MD's license?
NPPES lists Washington license number MD00033066, 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 Kenneth N. Mahrer, MD prescribe under Medicare Part D?
In 2024, Kenneth N. Mahrer, MD had 673 Medicare Part D claims for 163 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.