Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Sunung Khil, M.D.

Radiation Oncology Physician in Quincy, IL · enumerated 2005.

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

National Provider Identifier

1851398598

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Registry record

Entity type Individual (Type 1)

Name Mark Sunung Khil

Credential M.D.

Sex Male

Practice address 1005 Broadway St, Quincy, IL, 62301

Phone (217) 277-3500

Fax (217) 223-7327

Enumeration date Jul 7, 2005

Last updated in NPPES Nov 27, 2023

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 036105011 (IL) 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.

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Frequently asked questions

How do I verify Mark Khil's NPI record?

Cross-check NPI 1851398598 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1851398598 active?

Yes, as of the latest NPPES snapshot, NPI 1851398598 is active (record last updated 2023-11-27).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-27.