ALLEN C. FOSTER MD
NPI 1043261399
Internal Medicine - Sleep Medicine in La Crosse, WI
About Allen C. Foster Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALLEN C. FOSTER MD (NPI 1043261399) is an individual sleep medicine provider in La Crosse, Wisconsin, licensed in Wisconsin (38156-020) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Gundersen Lutheran Medical Center, and maintains a secondary practice location in Fond Du Lac.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Allen C. Foster Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
12Medicare enrollment records show Allen Foster reassigns Medicare billing to 12 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
La Crosse, WI 54601
- Reassigned Medicare billing, Wisconsin enrollment
- 928 clinicians in this Medicare group
La Crosse, WI 54601
- Reassigned Medicare billing, Wisconsin enrollment
- 1,457 clinicians in this Medicare group
Blair, WI 54616
- Reassigned Medicare billing, Wisconsin enrollment
- 293 clinicians in this Medicare group
Tomah, WI 54660
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1992970453 (Wisconsin)
- 188 clinicians in this Medicare group
Black River Falls, WI 54615
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1811940331 (Wisconsin)
- 227 clinicians in this Medicare group
Hillsboro, WI 54634
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: St Josephs Health Services Inc
- 282 clinicians in this Medicare group
Alma, WI 54610
- Reassigned Medicare billing, Wisconsin enrollment
- 86 clinicians in this Medicare group
Boscobel, WI 53805
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1306804794 (Wisconsin)
- 76 clinicians in this Medicare group
La Valle, WI 53941
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1457780983 (Wisconsin)
- 106 clinicians in this Medicare group
West Union, IA 52175
- Reassigned Medicare billing, Wisconsin enrollment
- 68 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 12
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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Gundersen Lutheran Medical Center
Acute Care Hospitals · La Crosse, WIGundersen St Josephs Hospital And Clinics
Critical Access Hospitals · Hillsboro, WIGundersen Boscobel Area Hospital And Clinics
Critical Access Hospitals · Boscobel, WIReedsburg Area Medical Center
Critical Access Hospitals · Reedsburg, WISouthwest Health Center
Critical Access Hospitals · Platteville, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54601 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 18
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.
LA CROSSE, WI 54601
LA CROSSE, WI 54601
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 Allen Foster's NPI number?
The NPI number for Allen Foster is 1043261399. It was assigned to this individual provider in the NPPES registry on May 12, 2006. The provider is also known as Allen C. Anderson.
Where is Allen Foster located?
Allen Foster practices at 1836 South Ave, La Crosse, WI 54601. The listed phone number is (608) 782-7300.
What is Allen Foster's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Sleep Medicine, with taxonomy code 207RS0012X.
Is Allen Foster enrolled in Medicare?
Yes. Allen Foster is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Allen Foster's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allen Foster reassigns Medicare benefits to 12 organizations: Gundersen Clinic Ltd (La Crosse, WI), Gundersen Lutheran Medical Center, Inc (La Crosse, WI), Tri-County Memorial Hospital, Inc. (Blair, WI), Tomah Memorial Hospital Inc (Tomah, WI), Black River Health Inc (Black River Falls, WI) and 7 more organizations, listed in the Medicare section above. 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 Allen Foster's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Allen Foster accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, Dean Health Plan, Group Health Cooperative-SCW and HealthPartners and 3 other insurers list Allen Foster 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.
Is Allen Foster affiliated with any hospitals?
According to CMS data, Allen Foster is affiliated with Gundersen Lutheran Medical Center, Gundersen St Josephs Hospital And Clinics, Gundersen Boscobel Area Hospital And Clinics, Reedsburg Area Medical Center and Southwest Health Center.
When was this NPI record last updated?
The NPPES record for Allen Foster was last updated on April 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Allen C. Foster, MD · NPI 1043261399
Sleep Medicine physician in La Crosse, Wisconsin. Individual provider, active in the CMS NPPES registry since May 12, 2006.
## Identity
- **NPI:** 1043261399 (Entity type: Individual)
- **Enumerated:** May 12, 2006
- **Primary specialty:** Internal Medicine - Sleep Medicine · taxonomy 207RS0012X
- **State license:** 38156-020 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 1836 SOUTH AVE, La Crosse, WI 54601-5429
- **Phone:** (608) 782-7300
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 12 organizations under Medicare reassignment (form CMS-855R): Gundersen Clinic Ltd (NPI 1851343115, La Crosse, WI); Gundersen Lutheran Medical Center, Inc (NPI 1619210895, La Crosse, WI); Tri-County Memorial Hospital, Inc. (NPI 1659625192, Blair, WI); Tomah Memorial Hospital Inc (NPI 1184765240, Tomah, WI); Black River Health Inc (NPI 1003914011, Black River Falls, WI); and 7 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Illinois College Of Med, class of 1993
## Record status
- **NPPES last updated:** April 18, 2024
- **Other identifiers:** Medicaid 32286700 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1043261399) · Data from the CMS NPPES public registry.