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

Donald R Doyle, MD

Pulmonary Disease Physician in Fairfield, CA · enumerated 2005.

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

National Provider Identifier

1699766220

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Donald R Doyle

Credential MD

Sex Male

Practice address Fairfield, CA, 94533

Phone (707) 646-4180

Fax (707) 646-4185

Enumeration date Nov 2, 2005

Last updated in NPPES Aug 14, 2013

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

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License A42131 (CA) Primary

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
00A421310	Medicaid	CA	-

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

How do I verify Donald Doyle's NPI record?

Cross-check NPI 1699766220 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1699766220 active?

Yes, as of the latest NPPES snapshot, NPI 1699766220 is active (record last updated 2013-08-14).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-08-14.