John Key, DO
NPI 1134103732 · Cardiovascular Disease Physician · Wyoming, MI
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Key, DO is a Cardiovascular Disease Physician provider in Wyoming, MI (NPI 1134103732).
Provider details
- NPI number
- 1134103732
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5101010722 (MI)
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
1,602 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) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 306 | $68 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 267 | $8 |
| Physician Review, Interpretation, and Patient Management of Home Inr Testing for Patient With Either Mechanical Heart Valve(s), Chronic Atrial Fibrillation, Or Venous Thromboembolism Who Meets Medicare Coverage Criteria; Testing Not Occurring More FrequentG0250 | 117 | $9 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 77 | $79 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 73 | $98 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 338 | 130 |
| Apixabanbrand: Eliquis | 261 | 82 |
| Atorvastatin Calcium | 225 | 81 |
| Losartan Potassium | 191 | 68 |
| Rosuvastatin Calcium | 190 | 67 |
| Amlodipine Besylate | 173 | 62 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-06
- Last updated
- 2021-02-25
- Certified
- 2021-02-25
Frequently asked questions
- What is John Key's NPI number?
- John Key's National Provider Identifier (NPI) is 1134103732, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Key's specialty?
- John Key is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Key located?
- John Key's practice location on file with NPPES is 5900 Byron Center Ave Sw, Wyoming, MI 49519-9606.
- What is John Key's phone number?
- The practice phone number listed in the NPPES registry for John Key is (616) 241-2333.
- Does John Key accept Medicare?
- John Key is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Key's NPI active?
- Yes — John Key's NPI (1134103732) is active in the NPPES registry as of the last update on 2021-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.