Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark D Chilton, M.D.

Q: What is the NPI number for Mark Chilton?

The National Provider Identifier (NPI) for Mark Chilton is 1689644072, a Type 1 (individual) record in the CMS NPPES registry.

Specialist in Frederick, MD · enumerated 2006.

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

National Provider Identifier

1689644072

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Registry record

Entity type Individual (Type 1)

Name Mark D Chilton

Credential M.D.

Sex Male

Practice address 86 Thomas Johnson Ct, Frederick, MD, 21702

Phone (301) 694-8311

Fax (301) 694-3537

Enumeration date Jan 26, 2006

Last updated in NPPES Jun 6, 2020

Taxonomy & licenses

174400000X Specialist Other Service Providers · License D33237 (MD) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mark Chilton?

The National Provider Identifier (NPI) for Mark Chilton is 1689644072, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Chilton practice?

The practice location on file with NPPES is in Frederick, MD. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-06.