Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Marcelo U Grazziotin, M.D.

Surgery Physician in Green Bay, WI · enumerated 2005.

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

National Provider Identifier

1497758072

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Registry record

Entity type Individual (Type 1)

Name Dr. Marcelo U Grazziotin

Credential M.D.

Sex Male

Practice address 720 S. Vanburen St. Suite 201, Green Bay, WI, 54301

Phone (920) 433-7488

Fax (920) 438-7193

Enumeration date May 27, 2005

Last updated in NPPES Jul 26, 2022

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 46257 (WI) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 46257-20 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Marcelo Grazziotin?

The National Provider Identifier (NPI) for Marcelo Grazziotin is 1497758072, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marcelo Grazziotin practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-26.