Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark James Carlson, M.D.
Specialist in Duluth, MN · enumerated 2005.
Data current as of Jul 11, 2026 · sourced from CMS NPPES
National Provider Identifier
1932104445
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark James Carlson
Credential M.D.
Sex Male
Practice address 1000 E 1st St, Ste 400, Duluth, MN, 55805
Phone (218) 722-5513
Fax (218) 722-6515
Enumeration date Jun 21, 2005
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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.
Frequently asked questions
Is NPI 1932104445 active?
Yes — as of the latest NPPES snapshot, NPI 1932104445 is active (record last updated 2007-07-08).
How do I verify Mark Carlson's NPI record?
Cross-check NPI 1932104445 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 2026-07-11. Provider record last updated 2007-07-08.