Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Diane B Tsai, M.D.
Counselor in Tacoma, WA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1265575799
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Registry record
Entity type Individual (Type 1)
Name Diane B Tsai
Credential M.D.
Sex Female
Practice address 4301 S Pine St, Ste 301, Tacoma, WA, 98409
Phone (253) 476-6500
Enumeration date Feb 15, 2007
Last updated in NPPES Oct 17, 2007
Taxonomy & licenses
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 |
|---|---|---|---|
| 8242893 | 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.
Frequently asked questions
Is NPI 1265575799 active?
Yes, as of the latest NPPES snapshot, NPI 1265575799 is active (record last updated 2007-10-17).
How do I verify Diane Tsai's NPI record?
Cross-check NPI 1265575799 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 2007-10-17.