Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Michael Christopher Hassert, MSN, APN, AGNP-C

Adult Health Nurse Practitioner in Saint Louis, MO · enumerated 2020.

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

National Provider Identifier

1972119014

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Registry record

Entity type Individual (Type 1)

Name Mr. Michael Christopher Hassert

Credential MSN, APN, AGNP-C

Sex Male

Practice address Saint Louis, MO, 63139

Phone (573) 247-9982

Enumeration date Sep 22, 2020

Last updated in NPPES Mar 15, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363LG0600X Gerontology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 2023007556 (MO) Secondary

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 2023007556 (MO) Primary

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 specialty is Michael Hassert?

Michael Hassert is registered in NPPES with the primary taxonomy of Adult Health Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Berthold Nursing Center Inc Skilled Nursing Facility · Saint Louis, MO NPI 1407888407 Oak Park Healthcare LLC Skilled Nursing Facility · Saint Louis, MO NPI 1932522737

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-03-15.