MAXWELL SUMKIN BUTLER MD
NPI 1326787755
Family Medicine in Sun Prairie, WI

Q: What is Maxwell Butler's NPI number?

The NPI number for Maxwell Butler is 1326787755. It was assigned to this individual provider in the NPPES registry on June 2, 2022.

Q: What is Maxwell Butler's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Maxwell Butler was last updated on August 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since June 02, 2022PECOS EnrolledAccepts Medicare Assignment

2651 WINDSOR ST, SUN PRAIRIE, WI 53590(608) 837-2206 Get Directions Write a Review

NPPES record last updated: August 7, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Maxwell Sumkin Butler Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MAXWELL SUMKIN BUTLER MD (NPI 1326787755) is an individual family medicine provider in Sun Prairie, Wisconsin, licensed in Wisconsin (85401) and active in the NPI registry since June 2022. He is enrolled in Medicare PECOS, is affiliated with University Of Wi Hospitals & Clinics Authority, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1326787755

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameMAXWELL SUMKIN BUTLERCredential: MD

Location Address2651 WINDSOR STSun Prairie, WI 53590-9825

Mailing Address7974 Uw Health CtMiddleton, WI 53562-5531

Phone(608) 837-2206

Sole ProprietorNo

Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 2022

Enumeration DateJune 2, 2022

Last NPPES UpdateAugust 7, 2026

NPPES CertifiedAugust 7, 2026

✔ NPI 1326787755 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in WI · 85401

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

Also ListedPsychiatry & Neurology · Addiction MedicineTaxonomy 2084A0401X · License 85401-20 (WI)

2651 WINDSOR ST, Sun Prairie, WI 53590

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Secondary Practice Locations 4

Location 12402 Winnebago StMadison, WI 53704-5341 · Phone (608) 828-7603 · Fax (608) 242-6848

Location 2600 Highland AveMadison, WI 53792-0001 · Phone (608) 262-2919

Location 37102 Mineral Point RdMadison, WI 53717-1706 · Phone (608) 828-7676

Location 44602 Eastpark BlvdMadison, WI 53718-2002 · Phone (608) 263-6400 · Fax (608) 262-6743

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

Maxwell Sumkin Butler 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.

PECOS PAC ID4486032166

PECOS Enrollment IDI20250812001613

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Maxwell Butler reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Wisconsin Medical Foundation, Inc

14 mi

Multi-Specialty

7974 UW HEALTH COURT
Middleton, WI 53562

Reassigned Medicare billing, Wisconsin enrollment
2,832 clinicians in this Medicare group

NPI 1598784555 (608) 829-5485

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Of Wi Hospitals & Clinics Authority

Acute Care Hospitals · Madison, WI

4/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number520098

Location600 Highland AvenueMadison, WI 53792 · Dane County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53590 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$82.92 typical visit price

range $53.90 – $163.24

Typical copayment $20.73 (range $13.47 – $40.81)

Most-billed visit code 99203

Established Patient

$95.41 typical visit price

range $17.40 – $133.76

Typical copayment $23.85 (range $4.35 – $33.44)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARIA A CARWILE APNP, FNP-BC

Nurse Practitioner (Family)