Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Carol Marie Grabowski, MD

Radiation Oncology Physician in Appleton, WI · enumerated 2006.

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

National Provider Identifier

1669582532

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Registry record

Entity type Individual (Type 1)

Name Dr. Carol Marie Grabowski

Credential MD

Sex Female

Practice address 3925 N Gateway Dr, Appleton, WI, 54913

Phone (920) 749-1171

Fax (920) 749-1172

Enumeration date Aug 30, 2006

Last updated in NPPES Feb 28, 2025

Taxonomy & licenses

2085H0002X Hospice and Palliative Medicine (Radiology) Physician Allopathic & Osteopathic Physicians · License 33288 (MN) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 33288 (MN) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 64957 (WI) 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.

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Frequently asked questions

How do I verify Carol Grabowski's NPI record?

Cross-check NPI 1669582532 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1669582532 active?

Yes — as of the latest NPPES snapshot, NPI 1669582532 is active (record last updated 2025-02-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-28.