Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Barbara M. Retzlaff, R.D.
Registered Dietitian in Seattle, WA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1154389880
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Registry record
Entity type Individual (Type 1)
Name Barbara M. Retzlaff
Credential R.D.
Sex Female
Practice address 325 9th Ave, Box 359735, Seattle, WA, 98104
Phone (206) 341-4612
Fax (206) 341-4614
Enumeration date May 2, 2006
Last updated in NPPES Jul 9, 2007
Taxonomy & licenses
133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License DI00001770 (WA) Primary
RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration.
About the RD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0203185 | Other | WA | L&I PIN |
| 50382U | Other | WA | REGENCE BLUE SHIELD PIN |
| 8440521 | 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
How do I verify Barbara Retzlaff's NPI record?
Cross-check NPI 1154389880 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1154389880 active?
Yes, as of the latest NPPES snapshot, NPI 1154389880 is active (record last updated 2007-07-09).
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.