Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Dean Christensen, MD

Family Medicine Physician in Castle Pines, CO · enumerated 2011.

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

National Provider Identifier

1588944516

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Dean Christensen

Credential MD

Sex Male

Practice address 7280 Lagae Rd Ste J, Castle Pines, CO, 80108

Phone (303) 814-0505

Fax (303) 814-6491

Enumeration date Aug 22, 2011

Last updated in NPPES Aug 23, 2023

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A115152 (CA) Secondary

207QS0010X Sports Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License DR.0056009 (CO) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 56009 (CO) 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 Christensen?

The National Provider Identifier (NPI) for Mark Christensen is 1588944516, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Christensen practice?

The practice location on file with NPPES is in Castle Pines, CO. 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 2023-08-23.