Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Donald R Doyle MD Inc A Professional Corp

Pulmonary Disease Physician in Fairfield, CA · enumerated 2009 · authorized official Donald Doyle, Owner.

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

National Provider Identifier

1023347101

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Donald R Doyle MD Inc A Professional Corp

Practice address 1860 Pennsylvania Ave, Suite 300b, Fairfield, CA, 94533

Phone (707) 646-4180

Enumeration date Dec 18, 2009

Last updated in NPPES Dec 9, 2019

Taxonomy & classification

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Donald Doyle

Title Owner

Phone (707) 646-4180

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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2019-12-09. Verify at npiregistry.cms.hhs.gov.

Where is Donald R Doyle MD Inc A Professional Corp located?

The practice location on file with NPPES is in Fairfield, CA.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-09.