Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Gretchen Wagner, MD

Individual provider Addiction Medicine (Family Medicine) Physician · NPI 1194187864

Gretchen Wagner, MD is registered under Family Practice in Greenville, Wisconsin. Graduated from Medical College of Wisconsin in 2016, 10 years ago. Practices with Ascension Medical Group-Fox Valley Wisconsin, Inc, a 260-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Wisconsin.

Years since qualifying
10
Trained at
Medical College of Wisconsin
Licensed in
WI
In the registry since
2016
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

W6981 Parkview Dr
Greenville, WI 54942-8034
Phone: (920) 882-2400
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1121 E North Ave, Milwaukee, WI 53212-3515 — (414) 267-6502

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 67986-20 (WI)
Addiction Medicine (Family Medicine) Physician Taxonomy 207QA0401X · Licence 67986-20 (WI)

Record details

NPI number1194187864
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 22, 2016
Last updated in NPPESOctober 16, 2025
Certification dateOctober 16, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 2016 (10 years in practice)
Group practice Ascension Medical Group-Fox Valley Wisconsin, Inc — 260 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients83
Services billed 391 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Ascension Ne Wisconsin - St Elizabeth Campus Hospital · Appleton, WI

Colleagues at Ascension Medical Group-Fox Valley Wisconsin, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 260 clinicians in the practice; 12 are shown here.