WILLIAM KLAUS MAI MD
NPI 1427632116
Internal Medicine - Cardiovascular Disease in Jacksonville, FL

Q: What is William Mai's NPI number?

The NPI number for William Mai is 1427632116. It was assigned to this individual provider in the NPPES registry on May 8, 2021.

Q: What is William Mai's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for William Mai was last updated on June 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 08, 2021PECOS EnrolledAccepts Medicare Assignment

4500 SAN PABLO RD S, JACKSONVILLE, FL 32224(904) 953-2000 Get Directions Write a Review

NPPES record last updated: June 19, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 19, 2024, Jun 21, 2021, Jun 20, 2021 and 1 more (4 updates tracked since 2021).

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About William Klaus Mai Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM KLAUS MAI MD (NPI 1427632116) is an individual cardiovascular disease provider in Jacksonville, Florida, licensed in Florida (ME159160) and active in the NPI registry since May 2021. He is enrolled in Medicare PECOS, is affiliated with Mayo Clinic, and is a graduate of George Washington University School Of Medicine (2021).

NPPES Registry Identity

NPI1427632116

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameWILLIAM KLAUS MAICredential: MD

Location Address4500 SAN PABLO RD SJacksonville, FL 32224-1865

Mailing Address4500 San Pablo Rd SJacksonville, FL 32224-1865 · (904) 953-2000

Phone(904) 953-2000

Sole ProprietorNo

Medical School CMSGeorge Washington University School Of MedicineGraduated 2021

Enumeration DateMay 8, 2021

Last NPPES UpdateJune 19, 20244 updates tracked since enumeration

NPPES CertifiedJune 19, 2024

✔ NPI 1427632116 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in FL · ME159160

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

4500 SAN PABLO RD S, Jacksonville, FL 32224

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Florida Blue (BlueCross BlueShield FL).Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Klaus Mai Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7517368533

PECOS Enrollment IDI20240627001420

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Mai reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mayo Clinic Jacksonville

0.2 mi

Health Service

4500 SAN PABLO RD S
Jacksonville, FL 32224

Reassigned Medicare billing, Florida enrollment
1,828 clinicians in this Medicare group

NPI 1174143986 (904) 953-2000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mayo Clinic

Acute Care Hospitals · Jacksonville, FL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100151

Location4500 San Pablo RdJacksonville, FL 32224 · Duval County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 32224 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$130.04 typical visit price

range $56.00 – $171.84

Typical copayment $32.51 (range $14.00 – $42.96)

Most-billed visit code 99204

Established Patient

$70.04 typical visit price

range $17.57 – $139.16

Typical copayment $17.51 (range $4.39 – $34.79)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KATHERINE L WALSH PA-C/MPH

Physician Assistant