Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Justin W. Smock, M.D.

Hospitalist Physician in Iowa City, IA · enumerated 2007.

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

National Provider Identifier

1720284128

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Registry record

Entity type Individual (Type 1)

Name Justin W. Smock

Credential M.D.

Sex Male

Practice address 200 Hawkins Dr, Internal Medicine, Se615 Gh, Iowa City, IA, 52242

Phone (319) 384-6501

Fax (319) 356-3086

Enumeration date Jun 22, 2007

Last updated in NPPES Oct 25, 2024

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MD-39024 (IA) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 39024 (IA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Justin Smock?

Justin Smock is registered in NPPES with the primary taxonomy of Hospitalist Physician. 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-25.