Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Aaron Kay, MD

Adult Congenital Heart Disease Physician in Fairfield, OH · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1700094307

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. William Aaron Kay

Credential MD

Sex Male

Practice address 3000 Mack Rd Ste 100, Fairfield, OH, 45014

Phone (513) 751-4222

Fax (513) 874-3023

Enumeration date May 18, 2007

Last updated in NPPES Nov 20, 2023

Taxonomy & licenses

207RA0002X Adult Congenital Heart Disease Physician Allopathic & Osteopathic Physicians · License 35.087717 (OH) Primary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care · License 35.087717 (OH) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 01072677A (IN) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
201157870	Medicaid	IN	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1700094307 active?

Yes, as of the latest NPPES snapshot, NPI 1700094307 is active (record last updated 2023-11-20).

How do I verify William Kay's NPI record?

Cross-check NPI 1700094307 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Mehran Attari Clinical Cardiac Electrophysiology Physician · Fairfield, OH NPI 1760447148 Victoria Zysek Cardiovascular Disease Physician · Fairfield, OH NPI 1124295902 Adam Raskin Cardiovascular Disease Physician · Fairfield, OH NPI 1225264914 Brittany Nordin Cardiovascular Disease Physician · Fairfield, OH NPI 1528360203 Philip Carson Interventional Cardiology Physician · Fairfield, OH NPI 1952665887 Christopher Verdick Internal Medicine Physician · Fairfield, OH NPI 1689093098 Daniel Washko Cardiovascular Disease Physician · Fairfield, OH NPI 1437566312 Ryan Cook Family Nurse Practitioner · Fairfield, OH NPI 1720478548

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-20.