Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Melissa A Klein, PHD

Pharmacist in Manitowoc, WI · enumerated 2013.

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

National Provider Identifier

1821439415

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Registry record

Entity type Individual (Type 1)

Name Ms. Melissa A Klein

Credential PHD

Sex Female

Practice address 3415 Calumet Ave, Manitowoc, WI, 54220

Phone (920) 684-0253

Fax (920) 684-7706

Enumeration date Jul 10, 2013

Last updated in NPPES Jul 10, 2013

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 13463-40 (WI) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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

Is NPI 1821439415 active?

Yes, as of the latest NPPES snapshot, NPI 1821439415 is active (record last updated 2013-07-10).

How do I verify Melissa Klein's NPI record?

Cross-check NPI 1821439415 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 2013-07-10.