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JOSEPH P REGAN M.D.
NPI 1639116486
Surgery in Mequon, WI

Active since June 01, 2006PECOS EnrolledAccepts Medicare Assignment
81.48/100
CMS Quality Rating
13133 N. PORT WASHINGTON ROAD, SUITE 224, MEQUON, WI 53097(262) 240-0070(262) 243-0072 Get Directions Write a Review

NPPES record last updated: November 9, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Joseph P Regan M.d. NPPES

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

JOSEPH P REGAN M.D. (NPI 1639116486) is an individual surgery provider in Mequon, Wisconsin, licensed in Wisconsin (45445) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Ascension Columbia St Mary's Hospital Milwaukee, and is a graduate of Northwestern University Feinberg Medical School (1996).

NPPES Registry Identity

NPI1639116486
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameJOSEPH P REGANCredential: M.D.
Location Address13133 N. PORT WASHINGTON ROAD, SUITE 224Mequon, WI 53097-2420
Mailing Address788 N Jefferson St, Suite 300/attn. Kaaren ButzenMilwaukee, WI 53202-3718 · (414) 272-8950 · Fax (414) 272-0859
Phone(262) 240-0070
Fax(262) 243-0072
Sole ProprietorNo
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 1996
Enumeration DateJune 1, 2006
Last NPPES UpdateNovember 9, 2016
✔ NPI 1639116486 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in WI · 45445
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
13133 N. PORT WASHINGTON ROAD, Mequon, WI 53097
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Other Identifiers 2

Medicaid1639116486WI
Medicare PIN004073645WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Network Health.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

Joseph P Regan M.d. 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 ID547238438
PECOS Enrollment IDI20040921000251
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 Reassignments

2

Medicare enrollment records show Joseph Regan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Columbia St. Mary's Hospital Milwaukee, Inc
0.1 mi
Multi-Specialty
13111 N PORT WASHINGTON RD
Mequon, WI 53097
  • Reassigned Medicare billing, Wisconsin enrollment
  • Medicare enrollment name: Columbia St Marys Hospital Milwaukee Inc
  • 856 clinicians in this Medicare group
NPI 1710928221 (414) 270-4932
Madison Medical Affiliates, Inc.
15 mi
General Practice
788 N JEFFERSON STREET, SUITES 201,300, 401
Milwaukee, WI 53202
  • Reassigned Medicare billing, Wisconsin enrollment
  • 84 clinicians in this Medicare group
NPI 1588695746 (414) 272-8950

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 3

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
27 services11 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
17 services17 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
12 services12 patients

Hospital Affiliations CMS Care Compare

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

Ascension Columbia St Mary's Hospital Milwaukee

Acute Care Hospitals · Milwaukee, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number520051
Location2323 N Lake DrMilwaukee, WI 53211 · Milwaukee County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53097 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
$67.37 typical visit price
range $17.40 – $133.76
Typical copayment $16.84 (range $4.35 – $33.44)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

81.48/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality88.39
Promoting Interoperability100
Improvement Activities40
Cost49.87

Other Providers at the Same Location NPPES 2

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

DR. RICHARD P CATTEY MD
Surgery
13133 N. PORT WASHINGTON ROAD, SUITE 224
MEQUON, WI 53097
Ozaukee County (262) 243-0064
DR. SRIHARI R RAMANUJAM MD
Internal Medicine (Gastroenterology)
13133 N. PORT WASHINGTON ROAD, SUITE G-16
MEQUON, WI 53097
Ozaukee County (262) 243-2500

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 Joseph Regan's NPI number?

The NPI number for Joseph Regan is 1639116486. It was assigned to this individual provider in the NPPES registry on June 1, 2006.

Where is Joseph Regan located?

Joseph Regan practices at 13133 N. Port Washington Road Suite 224, Mequon, WI 53097. The listed phone number is (262) 240-0070.

What is Joseph Regan's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Joseph Regan enrolled in Medicare?

Yes. Joseph Regan 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 Joseph Regan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Regan reassigns Medicare benefits to 2 organizations: Columbia St. Mary's Hospital Milwaukee, Inc (Mequon, WI) and Madison Medical Affiliates, Inc. (Milwaukee, WI). 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 Joseph Regan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Joseph Regan accept?

Health plans from Anthem Blue Cross and Blue Shield and Network Health list Joseph Regan 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 Joseph Regan affiliated with any hospitals?

According to CMS data, Joseph Regan is affiliated with Ascension Columbia St Mary's Hospital Milwaukee.

When was this NPI record last updated?

The NPPES record for Joseph Regan was last updated on November 9, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.