Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Christopher J Withers, D.O.

Internal Medicine Physician in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1942221114

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Christopher J Withers

Credential D.O.

Sex Male

Practice address 2555 N Martin Luther King Dr, Milwaukee, WI, 53212

Phone (414) 372-8080

Enumeration date Jul 22, 2006

Last updated in NPPES Feb 14, 2020

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 45668-021 (WI) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
43506600	Medicaid	WI	-
P00134127	Other	WI	MEDICARE RAILROAD

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 Christopher Withers?

The National Provider Identifier (NPI) for Christopher Withers is 1942221114, a Type 1 (individual) record in the CMS NPPES registry.

Where does Christopher Withers practice?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-14.