Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew Carlson, MD

Hospitalist Physician in Gulfport, MS · enumerated 2005.

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

National Provider Identifier

1609865682

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew Carlson

Credential MD

Sex Male

Practice address 4500 13th St, Gulfport, MS, 39501

Phone (228) 376-0577

Enumeration date Oct 20, 2005

Last updated in NPPES Sep 14, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20383 (MS) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 20383 (MS) 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
20383	Other	MS	MISSISSIPPI STATE LICENSE

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

How do I verify Matthew Carlson's NPI record?

Cross-check NPI 1609865682 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609865682 active?

Yes, as of the latest NPPES snapshot, NPI 1609865682 is active (record last updated 2023-09-14).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-14.