Frederick William Mayer, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Visalia, CA
Frederick William Mayer, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Visalia, California, and NPI 1366417297, issued on Feb 22, 2006. Check the license (California G35454, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Frederick William Mayer
- Credential
- MD
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- G35454 CA
Self-reported in NPPES; status is on the state search - Practice location
- 505 W Main St, Visalia, CA 93291
- Phone
- (559) 627-8600
- Enumerated
- Feb 22, 2006
- Record last updated
- Mar 17, 2022
- Medicaid ID
- 00G354540 CA
- Medicare enrollment
- Enrolled (PECOS I20081126000419); accepts Medicare assignment
- Medical or professional school
- Wake Forest University School Of Medicine, 1976
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 634 in California → Look up another NPI →
Also registered at 505 W Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah Minasyan, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1669646451
Verify Frederick William Mayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G35454Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
36 Medicare Part D claims for 22 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 89 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $83.32
5 payments; by number, the most common kind was food and beverage; the largest payer was Atricure, Inc. The 4,047 providers of this specialty with any payment received $7,828.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Kaweah Delta Health Care DistrictVisalia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frederick William Mayer among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California
Frederick William Mayer, MD is one of 634 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in California. 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 10% of them.
- NPI issued2006 · 10% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1976 · median 1997 among the 408 with a school on file
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in California
There are 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California.
All 634 in California → Every provider in Visalia → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Leheb Araim, M.D.Visalia, CA 932911083623540
- Sergio Caminha, MDVisalia, CA 932911104891951
- Phyllis Edwards, MDVisalia, CA 932911164497954
- Benny Lee, M.D.Visalia, CA 932911356348700
- Sarah Minasyan, M.D.Visalia, CA 932911669646451
- Steven Plato, M.D.Visalia, CA 932911023300647
- Aldrin Alpuerto, MDBakersfield, CA 933011376049767
- Rodrigo Miranda, MDBakersfield, CA 933011578622148
Common questions
What is Frederick William Mayer, MD's NPI number?
Frederick William Mayer, MD's National Provider Identifier (NPI) is 1366417297, issued on Feb 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Frederick William Mayer, MD located?
The NPPES record lists a practice address at 505 W Main St, Visalia, CA, 93291. Phone: (559) 627-8600. Providers update this record themselves, so call before visiting.
How can I verify Frederick William Mayer, MD's license?
NPPES lists California license number G35454, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Frederick William Mayer, MD prescribe under Medicare Part D?
In 2024, Frederick William Mayer, MD had 36 Medicare Part D claims for 22 beneficiaries; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. Part D covers Medicare prescriptions only.
What is Frederick William Mayer, MD's MIPS final score?
The 2023 MIPS final score is 89 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.