Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Hazen Henry Tuck Jr., M.D.

Pulmonary Disease Physician in Janesville, WI · enumerated 2007.

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

National Provider Identifier

1124225487

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Registry record

Entity type Individual (Type 1)

Name Dr. Hazen Henry Tuck Jr.

Credential M.D.

Sex Male

Practice address 903 Mineral Point Ave, Lung Clinic, Janesville, WI, 53548

Phone (608) 752-6255

Enumeration date Jun 29, 2007

Last updated in NPPES Jul 16, 2013

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 54652-20 (WI) Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 54652-20 (WI) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1124225487 active?

Yes, as of the latest NPPES snapshot, NPI 1124225487 is active (record last updated 2013-07-16).

How do I verify Hazen Tuck's NPI record?

Cross-check NPI 1124225487 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 2013-07-16.