Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Harold B. Kaiser, M.D.

Clinical & Laboratory Immunology (Allergy & Immunology) Physician in Minneapolis, MN · enumerated 2006.

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

National Provider Identifier

1841250321

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Registry record

Entity type Individual (Type 1)

Name Dr. Harold B. Kaiser

Credential M.D.

Sex Male

Practice address 825 Nicollet Mall, Suite 1149, Minneapolis, MN, 55402

Phone (612) 338-3333

Fax (612) 349-3838

Enumeration date Mar 27, 2006

Last updated in NPPES Feb 2, 2010

Taxonomy & licenses

207KI0005X Clinical & Laboratory Immunology (Allergy & Immunology) Physician Allopathic & Osteopathic Physicians · License 13869 (MN) 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
774563000	Medicaid	MN	-

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

Where does Harold Kaiser practice?

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

What is the NPI number for Harold Kaiser?

The National Provider Identifier (NPI) for Harold Kaiser is 1841250321, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-02.