Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Christopher Barnett Baker Jr., M.D.

Radiation Oncology Physician in Bozeman, MT · enumerated 2016.

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

National Provider Identifier

1609223932

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Registry record

Entity type Individual (Type 1)

Name Dr. Christopher Barnett Baker Jr.

Credential M.D.

Sex Male

Practice address 931 Highland Blvd Ste 3130, Bozeman, MT, 59715

Phone (406) 414-5070

Fax (406) 414-5029

Enumeration date May 17, 2016

Last updated in NPPES Jul 1, 2024

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 11393127-1205 (UT) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License MED-PHYS-LIC-127559 (MT) 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.

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Frequently asked questions

What specialty is Christopher Baker?

Christopher Baker is registered in NPPES with the primary taxonomy of Radiation Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-01.