Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark W Graves, MD

Internal Medicine Physician in Springfield, IL · enumerated 2006 · practices at Board of Trustees of Southern Illinois University.

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

National Provider Identifier

1285702308

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Registry record

Entity type Individual (Type 1)

Name Mark W Graves

Credential MD

Sex Male

Practice address 751 N Rutledge St Ste 1100, Springfield, IL, 62702

Phone (217) 545-8000

Enumeration date Nov 30, 2006

Last updated in NPPES Dec 10, 2021

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 01043637A (IN) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036-145917 (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
000000109382	Other	IN	ANTHEM IM IDENTIFICATION
200043550	Medicaid	IN	-
000000277884	Other	IL	ANTHEM NUC MED ID
64878861	Other	KY	KY MEDICAID

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 Mark Graves?

Mark Graves is registered in NPPES with the primary taxonomy of Internal Medicine 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 2021-12-10.