John Tretter, M.D.
NPI 1346234564 · Cardiovascular Disease Physician · Casa Grande, AZ
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Tretter, M.D. is a Cardiovascular Disease Physician provider in Casa Grande, AZ (NPI 1346234564).
Provider details
- NPI number
- 1346234564
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 17169 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,082 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 564 | $123 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 300 | $14 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 285 | $176 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 193 | $75 |
| Exercise Or Drug-Induced Heart Stress Test With Electrocardiogram (ecg) With Supervision By Physician93016 | 152 | $20 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 464 | 155 |
| Apixabanbrand: Eliquis | 421 | 112 |
| Metoprolol Succinate | 304 | 98 |
| Losartan Potassium | 249 | 80 |
| Amlodipine Besylate | 218 | 71 |
| Metoprolol Tartrate | 214 | 83 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$848 across 43 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-02
- Last updated
- 2016-10-18
Frequently asked questions
- What is John Tretter's NPI number?
- John Tretter's National Provider Identifier (NPI) is 1346234564, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Tretter's specialty?
- John Tretter is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Tretter located?
- John Tretter's practice location on file with NPPES is 803 N Salk Dr, Casa Grande, AZ 85122-5447.
- What is John Tretter's phone number?
- The practice phone number listed in the NPPES registry for John Tretter is (520) 836-6682.
- Does John Tretter accept Medicare?
- John Tretter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Tretter's NPI active?
- Yes — John Tretter's NPI (1346234564) is active in the NPPES registry as of the last update on 2016-10-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.