Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Jay A. Keystone, M.D.

Allergy & Immunology (Internal Medicine) Physician in Vacaville, CA · enumerated 2011.

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

National Provider Identifier

1306115001

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Jay A. Keystone

Credential M.D.

Sex Male

Practice address Vacaville, CA, 95688

Phone (707) 446-8581

Fax (707) 446-8581

Enumeration date Dec 26, 2011

Last updated in NPPES Apr 9, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License C29865 (CA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License C29865 (CA) Secondary

207RA0201X Allergy & Immunology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License C29865 (CA) Primary

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

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 1306115001 active?

Yes, as of the latest NPPES snapshot, NPI 1306115001 is active (record last updated 2020-04-09).

How do I verify Jay Keystone's NPI record?

Cross-check NPI 1306115001 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-04-09.