Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michaela L Tsai, MD

Hematology & Oncology Physician in Seattle, WA · enumerated 2005.

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

National Provider Identifier

1801872502

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Registry record

Entity type Individual (Type 1)

Name Michaela L Tsai

Credential MD

Sex Female

Practice address 1221 Madison St, 2nd Fl, Seattle, WA, 98104

Phone (206) 386-2323

Fax (206) 215-6165

Enumeration date Dec 15, 2005

Last updated in NPPES Jan 17, 2022

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD61182267 (WA) 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
1801872502	Medicaid	WA	-

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

How do I verify Michaela Tsai's NPI record?

Cross-check NPI 1801872502 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1801872502 active?

Yes, as of the latest NPPES snapshot, NPI 1801872502 is active (record last updated 2022-01-17).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-17.