Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William James Ritchie, M.D.

Anesthesiology Physician in Kirkland, WA · enumerated 2005.

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

National Provider Identifier

1184627564

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Registry record

Entity type Individual (Type 1)

Name Dr. William James Ritchie

Credential M.D.

Sex Male

Practice address 12040 Ne 128th St # 69, Kirkland, WA, 98034

Phone (425) 899-3455

Enumeration date May 31, 2005

Last updated in NPPES Nov 26, 2018

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License MD60636225 (WA) Primary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 2003-0470 (NM) 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
797813	Medicaid	AZ	-
1184627564	Medicaid	WA	-
80926	Medicaid	NM	-
925207	Other	NM	PRONET / AETNA
30576555	Medicaid	NM	-
NM009L48	Other	NM	BLUE CROSS BLUE SHEILD

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

What is the NPI number for William Ritchie?

The National Provider Identifier (NPI) for William Ritchie is 1184627564, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Ritchie practice?

The practice location on file with NPPES is in Kirkland, WA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Samuel Yang Anesthesiology Physician · Kirkland, WA NPI 1316236276

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-26.