DR. CHRISTOPHER J WITHERS D.O.
NPI 1942221114
Internal Medicine in Milwaukee, WI
About Dr. Christopher J Withers D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CHRISTOPHER J WITHERS D.O. (NPI 1942221114) is an individual internal medicine provider in Milwaukee, Wisconsin, licensed in Wisconsin (45668-021) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Christopher J Withers D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Christopher Withers reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Milwaukee, WI 53205
- Reassigned Medicare billing, Wisconsin enrollment
- 88 clinicians in this Medicare group
Milwaukee, WI 53211
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Columbia St Marys Hospital Milwaukee Inc
- 856 clinicians in this Medicare group
Waukesha, WI 53188
- Reassigned Medicare billing, Wisconsin enrollment
- 81 clinicians in this Medicare group
Mesa, AZ 85205
- Reassigned Medicare billing, Arizona enrollment
- 110 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53212 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MILWAUKEE, WI 53212
MILWAUKEE, WI 53212
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Christopher Withers's NPI number?
The NPI number for Christopher Withers is 1942221114. It was assigned to this individual provider in the NPPES registry on July 22, 2006.
Where is Christopher Withers located?
Christopher Withers practices at 2555 N Martin Luther King Dr, Milwaukee, WI 53212. The listed phone number is (414) 372-8080.
What is Christopher Withers's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Christopher Withers enrolled in Medicare?
Yes. Christopher Withers is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Christopher Withers's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Christopher Withers reassigns Medicare benefits to 4 organizations: Outreach Community Health Centers, Inc. (Milwaukee, WI), Columbia St. Mary's Hospital Milwaukee Inc (Milwaukee, WI), Apogee Medical Group Waukesha, Sc (Waukesha, WI) and Archwell Health Professional Services Of Arizona, LLC (Mesa, AZ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Christopher Withers's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Christopher Withers accept?
Health plans from CareSource (Common Ground Healthcare) list Christopher Withers as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Christopher Withers was last updated on February 14, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Christopher J Withers, D.O. · NPI 1942221114
Internal Medicine physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since July 22, 2006.
## Identity
- **NPI:** 1942221114 (Entity type: Individual)
- **Enumerated:** July 22, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 45668-021 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 2555 N MARTIN LUTHER KING DR, Milwaukee, WI 53212-2709
- **Phone:** (414) 372-8080
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Outreach Community Health Centers, Inc. (NPI 1245720499, Milwaukee, WI); Columbia St. Mary's Hospital Milwaukee Inc (NPI 1225071491, Milwaukee, WI); Apogee Medical Group Waukesha, Sc (NPI 1528544608, Waukesha, WI); Archwell Health Professional Services Of Arizona, LLC (NPI 1558026880, Mesa, AZ) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 14, 2020
- **Other identifiers:** Other P00134127 (WI); Medicaid 43506600 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1942221114) · Data from the CMS NPPES public registry.