Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Calvin Alexander Grant, M.D.

Ophthalmology Physician in Palos Heights, IL · enumerated 2006.

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

National Provider Identifier

1679551014

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Registry record

Entity type Individual (Type 1)

Name Dr. Calvin Alexander Grant

Credential M.D.

Sex Male

Practice address 7808 W College Dr, Suite 1-Nw, Palos Heights, IL, 60463

Phone (708) 499-0123

Fax (708) 499-0611

Enumeration date Jan 5, 2006

Last updated in NPPES Dec 1, 2009

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 036111343 (IL) 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
205786	Other	IL	PTAN IL MEDICARE DUPAGE COUNTY
036111343	Medicaid	IL	-
205785	Other	IL	PTAN IL MEDICARE COOK COUNTY
036051267	Medicaid	IL	-
P00638025	Other	IL	MEDICARE RAILROAD IL
1679551014	Other	IL	NPI
K47805	Other	IL	PTAN

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

What specialty is Calvin Grant?

Calvin Grant is registered in NPPES with the primary taxonomy of Ophthalmology 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 2009-12-01.