DR. JOHN JOSEPH FLAHERTY JR. M.D., MPH
NPI 1528143807
Emergency Medicine in La Crosse, WI
About Dr. John Joseph Flaherty Jr. M.d., Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN JOSEPH FLAHERTY JR. M.D., MPH (NPI 1528143807) is an individual emergency medicine provider in La Crosse, Wisconsin, licensed in Wisconsin (86972) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Gundersen Lutheran Medical Center, and maintains 14 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 14
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
Dr. John Joseph Flaherty Jr. M.d., Mph 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 John Flaherty 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 and Minnesota enrollments
- Also billed through NPI 1376593442 (Minnesota)
- 1,457 clinicians in this Medicare group
Blair, WI 54616
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1124063573 (Wisconsin)
- 293 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
Boscobel, WI 53805
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1306804794 (Wisconsin)
- 76 clinicians in this Medicare group
Wabasha, MN 55981
- Reassigned Medicare billing, Minnesota enrollment
- 147 clinicians in this Medicare group
Friendship, WI 53934
- Reassigned Medicare billing, Wisconsin enrollment
- 67 clinicians in this Medicare group
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 clinicians in this Medicare group
Belleville, IL 62226
- Reassigned Medicare billing, Illinois enrollment
- 111 clinicians in this Medicare group
Clovis, NM 88101
- Reassigned Medicare billing, New Mexico enrollment
- 65 clinicians in this Medicare group
Hobbs, NM 88240
- Reassigned Medicare billing, New Mexico enrollment
- 119 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.
Hospital Affiliations CMS Care Compare
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, 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 John Flaherty's NPI number?
The NPI number for John Flaherty is 1528143807. It was assigned to this individual provider in the NPPES registry on October 26, 2006.
Where is John Flaherty located?
John Flaherty practices at 1836 South Ave, La Crosse, WI 54601. The listed phone number is (608) 782-7300.
What is John Flaherty's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is John Flaherty enrolled in Medicare?
Yes. John Flaherty 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 John Flaherty's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Flaherty reassigns Medicare benefits to 12 organizations: Gundersen Lutheran Medical Center, Inc (La Crosse, WI), Tri-County Memorial Hospital, Inc. (Blair, WI), St. Joseph's Health Services, Inc. (Hillsboro, WI), Memorial Hospital Of Boscobel (Boscobel, WI), Saint Elizabeths Hospital Of Wabasha Inc (Wabasha, MN) 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 John Flaherty's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Flaherty accept?
Health plans from Medica and Wellmark Health Plan of Iowa, Inc. list John Flaherty 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 John Flaherty affiliated with any hospitals?
According to CMS data, John Flaherty is affiliated with Gundersen Lutheran Medical Center.
When was this NPI record last updated?
The NPPES record for John Flaherty was last updated on April 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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. John Joseph Flaherty Jr., M.D., MPH · NPI 1528143807
Emergency Medicine physician in La Crosse, Wisconsin. Individual provider, active in the CMS NPPES registry since October 26, 2006.
## Identity
- **NPI:** 1528143807 (Entity type: Individual)
- **Enumerated:** October 26, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 86972 (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 Lutheran Medical Center, Inc (NPI 1689918377, La Crosse, WI); Tri-County Memorial Hospital, Inc. (NPI 1659625192, Blair, WI); St. Joseph's Health Services, Inc. (NPI 1972591410, Hillsboro, WI); Memorial Hospital Of Boscobel (NPI 1760459846, Boscobel, WI); Saint Elizabeths Hospital Of Wabasha Inc (NPI 1053346825, Wabasha, MN); and 7 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1981
## Record status
- **NPPES last updated:** April 3, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1528143807) · Data from the CMS NPPES public registry.