Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christa Johnson Mars, M.D.

Q: What is the NPI number for Christa Mars?

The National Provider Identifier (NPI) for Christa Mars is 1235139510, a Type 1 (individual) record in the CMS NPPES registry.

Surgery Physician in Barron, WI · enumerated 2005.

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

National Provider Identifier

1235139510

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Christa Johnson Mars

Credential M.D.

Sex Female

Practice address 1222 E Woodland Ave, Barron, WI, 54812

Phone (715) 537-3166

Enumeration date Jul 28, 2005

Last updated in NPPES Jan 12, 2012

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 14966R (LA) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 41999 020 (WI) 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 Christa Mars?

The National Provider Identifier (NPI) for Christa Mars is 1235139510, a Type 1 (individual) record in the CMS NPPES registry.

Where does Christa Mars practice?

The practice location on file with NPPES is in Barron, WI. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Eric Nuebel Physician Assistant · Barron, WI NPI 1154318616 Kathleen Nuebel Physician Assistant · Barron, WI NPI 1578550034 Curtis Ongstad Family Medicine Physician · Barron, WI NPI 1689656811 James Leavitt Orthopaedic Surgery Physician · Barron, WI NPI 1710967351 Thomas Stephens Physical Therapist · Barron, WI NPI 1891768081 Sarah Knepper Physical Therapist · Barron, WI NPI 1508839796 Karey Stevenson Occupational Therapist · Barron, WI NPI 1306819594 Nicolle Samuels Physical Therapist · Barron, WI NPI 1932172129

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-12.