Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael G Massee, MD

Obstetrics & Gynecology Physician in Marinette, WI · enumerated 2005 · practices at Oconto Hospital & Medical Center Inc.

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

National Provider Identifier

1316934730

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Registry record

Entity type Individual (Type 1)

Name Michael G Massee

Credential MD

Sex Male

Practice address 2820 Roosevelt Road, Marinette, WI, 54143

Phone (715) 735-5225

Fax (715) 735-5388

Enumeration date Sep 30, 2005

Last updated in NPPES Sep 21, 2023

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 40810020 (WI) 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
32575500	Medicaid	WI	-
160052938	Other	WI	RR-MEDICARE

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

How do I verify Michael Massee's NPI record?

Cross-check NPI 1316934730 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1316934730 active?

Yes, as of the latest NPPES snapshot, NPI 1316934730 is active (record last updated 2023-09-21).

Other providers at this practice address

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Nicole Hiniker Internal Medicine Physician · Marinette, WI NPI 1740277151 Beth Goetzman Family Nurse Practitioner · Marinette, WI NPI 1265429690 James Opoien Family Medicine Physician · Marinette, WI NPI 1265429674 Karen Eldevick Adult Medicine Physician · Marinette, WI NPI 1962493718 Jon Simmons Family Medicine Physician · Marinette, WI NPI 1336189075 Jeffrey Urban Pediatrics Physician · Marinette, WI NPI 1568478519 Oconto Hospital & Medical Center Inc Rural Health Clinic/Center · Marinette, WI NPI 1528412673

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-21.