William Klaus Mai, MD
Cardiovascular Disease Physician · Jacksonville, FL
William Klaus Mai, MD is a cardiovascular disease physician with a practice address in Jacksonville, Florida, and NPI 1427632116, issued on May 8, 2021. Check the license (Florida ME159160, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- William Klaus Mai
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- ME159160 FL
Self-reported in NPPES; status is on the state search - Practice location
- 4500 San Pablo RD S, Jacksonville, FL 32224
- Phone
- (904) 953-2000
- Enumerated
- May 8, 2021
- Record last updated
- Jun 19, 2024
- Medicare enrollment
- Enrolled (PECOS I20240627001420); accepts Medicare assignment
- Medical or professional school
- George Washington University School Of Medicine, 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,946 in Florida → Look up another NPI →
Also registered at 4500 San Pablo RD S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Abarbanel, MDNeurology Physician1598298242
- Ejigayehu Abate, MDEndocrinology, Diabetes & Metabolism Physician1679615116
- Suhny Abbara, MDDiagnostic Radiology Physician1538150180
- Sara Abbas, PA-CPhysician Assistant1356121206
- Carol Abbott, ARNP, FNP-CNurse Practitioner1629427240
- Zaid Abdel Rahman, M.D.Hematology (Internal Medicine) Physician1003299330
Verify William Klaus Mai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME159160Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
181 Medicare Part D claims for 58 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Metoprolol Succinate17 claims
- Atorvastatin Calcium16 claims
- Amlodipine Besylate11 claims
- Eliquis11 claims
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.
Bills Medicare through one group practice
- Mayo Clinic JacksonvilleJacksonville, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Klaus Mai among 1,946 cardiovascular disease physician records in Florida
William Klaus Mai, MD is one of 1,946 cardiovascular disease physician records with a practice address in Florida. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 98% of them.
- NPI issued2021 · 98% of these records are older, 1% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2021 · median 1995 among the 1,427 with a school on file
- Record last updated2024 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Florida
There are 1,946 cardiovascular disease physician records in Florida.
All 1,946 in Florida → Every provider in Jacksonville → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Riyaz Bashir, M.D.Jacksonville, FL 322241669466793
- Joseph Blackshear, MDJacksonville, FL 322241730176991
- Charles Bruce, MDJacksonville, FL 322241811975980
- Janice Clarke, MDJacksonville, FL 322241548247141
- Leslie Cooper, MDJacksonville, FL 322241801872056
- Gary Lane, MDJacksonville, FL 322241174510333
- Keith Oken, MDJacksonville, FL 322241619964871
- John Patton, MDJacksonville, FL 322241336136597
Common questions
What is William Klaus Mai, MD's NPI number?
William Klaus Mai, MD's National Provider Identifier (NPI) is 1427632116, issued on May 8, 2021. An NPI identifies a provider in billing; it is not a license.
Where is William Klaus Mai, MD located?
The NPPES record lists a practice address at 4500 San Pablo RD S, Jacksonville, FL, 32224. Phone: (904) 953-2000. Providers update this record themselves, so call before visiting.
How can I verify William Klaus Mai, MD's license?
NPPES lists Florida license number ME159160, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Klaus Mai, MD prescribe under Medicare Part D?
In 2024, William Klaus Mai, MD had 181 Medicare Part D claims for 58 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
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.