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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Michael J Ryan, M.D

Pulmonary Disease Physician in San Luis Obispo, CA · enumerated 2005.

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

National Provider Identifier

1700863511

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Registry record

Entity type Individual (Type 1)
Name Mr. Michael J Ryan
Credential M.D
Sex Male
Practice address 1428 Phillips Ln Ste 203, San Luis Obispo, CA, 93401
Phone (805) 543-4407
Fax (805) 543-4587
Enumeration date Dec 22, 2005
Last updated in NPPES Nov 3, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A86911 (CA) Secondary
207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License A86911 (CA) Secondary
207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License A86911 (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
1700863511 Medicaid VA -
PAR Other VA MULTIPLAN
-029 Other VA TRICARE/CHAMPUS
PAR Other VA VA PREMIER HEALTH
PAR Other VA VA HEALTH NETWORK
7221858 Other VA AETNA
PAR Other VA USA MANAGED CARE
PAR Other VA FIRST HEALTH COMMERCIAL
2174181 Other VA UHC/MAMSI
WA86911A Medicaid CA -
5908329 Medicaid NC -
6125139 Other VA CIGNA
08329 Other NC NC BC/BS
10025471 Other VA SENTARA/OPTIMA
342182 Other VA ANTHEM
7221858 Other CA AETNA PIN
PAR Other VA CORVEL/CORECARE

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.

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Frequently asked questions

Is NPI 1700863511 active?
Yes, as of the latest NPPES snapshot, NPI 1700863511 is active (record last updated 2023-11-03).
How do I verify Michael Ryan's NPI record?
Cross-check NPI 1700863511 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-03.