Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen Robert Seifert, RD,CD

Registered Dietitian in Manitowoc, WI · enumerated 2019.

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

National Provider Identifier

1841834678

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Registry record

Entity type Individual (Type 1)

Name Stephen Robert Seifert

Credential RD,CD

Sex Male

Practice address 3415 Custer St, Manitowoc, WI, 54220

Phone (920) 652-9310

Fax (920) 652-9316

Enumeration date Nov 5, 2019

Last updated in NPPES Jul 30, 2020

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 3455-29 (WI) Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD credential

Other identifiers

Identifier	Type	State	Issuer
86150257	Other	-	COMMISSION ON DIETETIC REGISTRATION

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 Stephen Seifert?

The National Provider Identifier (NPI) for Stephen Seifert is 1841834678, a Type 1 (individual) record in the CMS NPPES registry.

Where does Stephen Seifert practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-30.