Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Wilson Brunvand, MD

Hematology & Oncology Physician in Denver, CO · enumerated 2005.

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

National Provider Identifier

1891779534

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Wilson Brunvand

Credential MD

Sex Male

Practice address 1721 E 19th Ave, Ste 300, Denver, CO, 80218

Phone (720) 754-4800

Fax (720) 754-4801

Enumeration date Dec 6, 2005

Last updated in NPPES Feb 7, 2014

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 26243 (CO) 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
117831800	Medicaid	WY	-
1891779534	Medicaid	WY	-
200604790B	Medicaid	KS	-
200604791B	Medicaid	KS	-
37709003	Medicaid	NM	-
01026244	Medicaid	CO	-
10025893500	Medicaid	NE	-

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 Brunvand?

The National Provider Identifier (NPI) for Mark Brunvand is 1891779534, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Brunvand practice?

The practice location on file with NPPES is in Denver, 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 2014-02-07.