Dr. Marshall M. Willis, D.C.

Dr. Marshall M. Willis is a Chiropractor provider (Chiropractor) practicing in Overgaard, AZ, registered in the NPPES registry with NPI 1942382890 since 2006. The credential DC stands for Doctor of Chiropractic. Practices at Marshall M. Willis D.C., P.C. (listed at the same practice address in NPPES).

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NPI	1942382890
Entity type	Individual (Type 1)
Name	Dr. Marshall M. Willis
Credential	D.C.
Sex	Male
Practice address	2947 HWY 260, #3, Overgaard, AZ, 85933
Phone	9285356421
Enumeration date	2006-10-19
Last updated in NPPES	2025-06-25

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
111N00000X	Chiropractor	Primary	5288	AZ

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Copy-ready billing details

Provider: Marshall Willis, D.C.
NPI: 1942382890
Taxonomy: 111N00000X (Chiropractor)
Address: 2947 HWY 260, #3, Overgaard, AZ, 85933

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1043425622	Marshall M. Willis D.C., P.C.	Organization	Chiropractor	Overgaard, AZ
1891330312	Jennifer Owens	Individual	Speech-Language Assistant	Overgaard, AZ

Verify this record

Cross-check NPI 1942382890 against the authoritative CMS record: view Dr. Marshall M. Willis on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

What specialty is Marshall Willis?

Marshall Willis is registered in NPPES with the primary taxonomy of Chiropractor. 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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-06-25.