Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Marianne Clare Greenbaum, MD

Diagnostic Radiology Physician in Seattle, WA · enumerated 2006 · practices at Seattle Radiologists A Professional Corporation.

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

National Provider Identifier

1558440453

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Registry record

Entity type Individual (Type 1)

Name Dr. Marianne Clare Greenbaum

Credential MD

Sex Female

Practice address 1229 Madison Street, Suite 1150, Seattle, WA, 98104

Phone (206) 386-6300

Fax (206) 386-6316

Enumeration date Nov 3, 2006

Last updated in NPPES Sep 29, 2021

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD00037029 (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
0439517	Other	WA	L & I - SWEDISH RADIA EDMONDS
0439519	Other	WA	L & I - EVERGREEN RADIA
0439514	Other	WA	L & I - RADIA
0439515	Other	WA	L & I - RADIA KING
0439520	Other	WA	L & I - SOUTH SOUND RADIOLOGY
0439521	Other	WA	L & I - SEATTLE RADIOLOGY
0439522	Other	WA	L & I - VANCOUVER RADIOLOGISTS
8242273	Medicaid	WA	-
1013281	Medicaid	WA	-
135338	Other	WA	L & I

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

Where does Marianne Greenbaum practice?

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

What is the NPI number for Marianne Greenbaum?

The National Provider Identifier (NPI) for Marianne Greenbaum is 1558440453, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-29.