Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John L Black, M.D.

Clinical Pathology/Laboratory Medicine Physician in Rochester, MN · enumerated 2005.

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

National Provider Identifier

1790762862

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Registry record

Entity type Individual (Type 1)

Name John L Black

Credential M.D.

Sex Male

Practice address 200 1st St Sw, Rochester, MN, 55905

Phone (507) 284-2511

Enumeration date Dec 29, 2005

Last updated in NPPES Oct 6, 2020

Taxonomy & licenses

207ZP0105X Clinical Pathology/Laboratory Medicine Physician Allopathic & Osteopathic Physicians · License 26917 (MN) Primary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 26917 (MN) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

How do I verify John Black's NPI record?

Cross-check NPI 1790762862 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1790762862 active?

Yes, as of the latest NPPES snapshot, NPI 1790762862 is active (record last updated 2020-10-06).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-06.