Kenneth Mahrer, MD
NPI 1013989979 · Cardiovascular Disease Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kenneth Mahrer, MD is a Cardiovascular Disease Physician provider in Seattle, WA (NPI 1013989979).
Provider details
- NPI number
- 1013989979
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00033066 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
44 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 44 | $9 |
Typical Medicare-allowed amounts for these services range $9–$9 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Tartrate | 74 | 25 |
| Atorvastatin Calcium | 72 | 22 |
| Metoprolol Succinate | 64 | 27 |
| Losartan Potassium | 57 | 19 |
| Ezetimibe | 41 | 13 |
| Furosemide | 34 | 12 |
| Amiodarone Hcl | 32 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-06
- Last updated
- 2008-06-17
Frequently asked questions
- What is Kenneth Mahrer's NPI number?
- Kenneth Mahrer's National Provider Identifier (NPI) is 1013989979, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kenneth Mahrer's specialty?
- Kenneth Mahrer is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Kenneth Mahrer located?
- Kenneth Mahrer's practice location on file with NPPES is 1100 9th Ave, Seattle, WA 98101-2756.
- What is Kenneth Mahrer's phone number?
- The practice phone number listed in the NPPES registry for Kenneth Mahrer is (206) 223-6600.
- Does Kenneth Mahrer accept Medicare?
- Kenneth Mahrer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kenneth Mahrer's NPI active?
- Yes — Kenneth Mahrer's NPI (1013989979) is active in the NPPES registry as of the last update on 2008-06-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.