Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Madelaine Marie Greacen, MD

Family Medicine Physician in Santa Rosa, CA · enumerated 2018.

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

National Provider Identifier

1881182624

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Registry record

Entity type Individual (Type 1)

Name Madelaine Marie Greacen

Credential MD

Sex Female

Practice address 1162 Montgomery Dr Ste 200, Santa Rosa, CA, 95405

Phone (707) 890-4100

Enumeration date Apr 26, 2018

Last updated in NPPES Oct 4, 2021

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A174845 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Madelaine Greacen?

The National Provider Identifier (NPI) for Madelaine Greacen is 1881182624, a Type 1 (individual) record in the CMS NPPES registry.

Where does Madelaine Greacen practice?

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

Other providers at this practice address

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Eric Bell Physician Assistant · Santa Rosa, CA NPI 1891217204

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-04.