Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Mark Steven Kirk, DC

Chiropractor in Elizabeth, NJ · enumerated 2007.

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

National Provider Identifier

1326231457

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Steven Kirk

Credential DC

Sex Male

Practice address Elizabeth, NJ, 07208

Phone (908) 352-6868

Fax (908) 352-6865

Enumeration date Aug 22, 2007

Last updated in NPPES Apr 9, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 38MC00385300 (NJ) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier	Type	State	Issuer
223415327	Medicaid	NJ	-
408717	Medicaid	NJ	-

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

Is NPI 1326231457 active?

Yes, as of the latest NPPES snapshot, NPI 1326231457 is active (record last updated 2025-04-09).

How do I verify Mark Kirk's NPI record?

Cross-check NPI 1326231457 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-09.