Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Lynn Fetterolf, MD

Family Medicine Physician in New London, WI · enumerated 2006.

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

National Provider Identifier

1821069691

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Registry record

Entity type Individual (Type 1)

Name Michael Lynn Fetterolf

Credential MD

Sex Male

Practice address 1405 Mill St, New London, WI, 54961

Phone (920) 531-2400

Enumeration date Jan 30, 2006

Last updated in NPPES Dec 11, 2020

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD031976E (PA) Secondary

207VX0000X Obstetrics Physician Allopathic & Osteopathic Physicians · License MD031976E (PA) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 55231-20 (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
0010419750001	Medicaid	PA	-
450030702	Other	WI	MEDICARE PTAN
160011217	Other	PA	RAILROAD 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

Is NPI 1821069691 active?

Yes, as of the latest NPPES snapshot, NPI 1821069691 is active (record last updated 2020-12-11).

How do I verify Michael Fetterolf's NPI record?

Cross-check NPI 1821069691 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-11.