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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Carlton Brown, M.D.

Internal Medicine Physician in Sun City, AZ · enumerated 2005 · practices at Maxwell Group.

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

National Provider Identifier

1225021264

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark Carlton Brown
Credential M.D.
Sex Male
Practice address 14678 N Del Webb Blvd, Sun City, AZ, 85351
Phone (623) 933-8289
Fax (623) 933-2596
Enumeration date Aug 24, 2005
Last updated in NPPES Sep 9, 2016

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 19655 (AZ) 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
110078151 Other AZ RAILROAD MEDICARE
AZ0349500 Other AZ BLUE CROSS BLUE SHIELD

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

What is the NPI number for Mark Brown?
The National Provider Identifier (NPI) for Mark Brown is 1225021264, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Brown practice?
The practice location on file with NPPES is in Sun City, AZ. 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 2016-09-09.