Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Janice Rock, D.O.

Family Medicine Physician in Grand Rapids, MI · enumerated 2006.

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

National Provider Identifier

1639140742

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Registry record

Entity type Individual (Type 1)

Name Dr. Janice Rock

Credential D.O.

Sex Female

Practice address 80 68th St Se, Grand Rapids, MI, 49548

Phone (616) 391-8242

Fax (616) 391-8317

Enumeration date Jan 27, 2006

Last updated in NPPES May 18, 2015

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 5101 007810 (MI) Primary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 200401569 (NC) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License OS10821 (FL) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
5907933	Medicaid	NC	-
3060399	Medicaid	MI	-

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 Janice Rock's NPI record?

Cross-check NPI 1639140742 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639140742 active?

Yes, as of the latest NPPES snapshot, NPI 1639140742 is active (record last updated 2015-05-18).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-05-18.