Frederick Mayer, MD
NPI 1366417297 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Visalia, CA
Enrolled with Medicare as Practitioner - Cardiac Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frederick Mayer, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Visalia, CA (NPI 1366417297).
Provider details
- NPI number
- 1366417297
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G35454 (CA)
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
158 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 67 | $172 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 31 | $133 |
| Coronary Artery Bypass Using Artery Graft, 1 Graft33533 | 20 | $1,220 |
| Harvest of Vein Using an Endoscope33508 | 16 | $15 |
| Exclusion of Appendage of Left Upper Chamber of Heart Performed During Other Procedure on Chest33268 | 12 | $105 |
| Coronary Artery Bypass Using Vein Or Artery Graft, 2 Grafts33518 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$83 across 5 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
- 2006-02-22
- Last updated
- 2022-03-17
- Certified
- 2022-03-17
Frequently asked questions
- What is Frederick Mayer's NPI number?
- Frederick Mayer's National Provider Identifier (NPI) is 1366417297, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frederick Mayer's specialty?
- Frederick Mayer is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Frederick Mayer located?
- Frederick Mayer's practice location on file with NPPES is 505 W Main St, Visalia, CA 93291-6149.
- What is Frederick Mayer's phone number?
- The practice phone number listed in the NPPES registry for Frederick Mayer is (559) 627-8600.
- Does Frederick Mayer accept Medicare?
- Frederick Mayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frederick Mayer's NPI active?
- Yes — Frederick Mayer's NPI (1366417297) is active in the NPPES registry as of the last update on 2022-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.