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Active NPI 1649891284 Individual Practitioner Female Practitioner

Dr. Catherine Mayer , DO

Surgery • Oshkosh, WI

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Catherine Mayer, DO is a certified Surgery practicing in Oshkosh, WI. With approximately 6 years of clinical experience since completing medical education in 2020, Dr. Mayer delivers high-quality medical care to the local community at 855 N WESTHAVEN DR.

Dr. Mayer is affiliated with Aurora Medical Group, Inc. and accepts Medicare assignment.

Practice Location & Contact Primary Location

Practice Address

855 N Westhaven Dr

Oshkosh, WI 549047668

Telephone 9203038700
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Other

Graduation Year

2020

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Oshkosh, WI

Experienced Practitioner (5-10 Yrs)
Practitioner Clinical Experience
6 Yrs -18.3 yrs vs City Avg
City Avg: 24.3 Yrs
State Avg: 25.2 Yrs
Regional Practice Density
14 Specialists

Practicing in Oshkosh, WI (765 Statewide)

Telehealth Adoption Rate
0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mayer (6 Years) 6 Yrs
Oshkosh Specialty Average (24.3 Years) 24.3 Yrs

Medical Specialties & State Licenses

CMS Verified: 2025-09-17
Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License WI 76035-21

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
100183475 (WI)

Hospital & Practice Group Affiliations

Aurora Medical Group, Inc.

855 N Westhaven Dr, Oshkosh, WI 549047668

Phone: 9203038700

Secondary Practice Locations

1000 N Oak Ave

Marshfield, WI 544495702

Phone: 7153879222

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
Jacqueline Ots , PENDING

Nurse Practitioner

NPI 1003456823
Leah Fynaardt

Physician Assistant

NPI 1003702689
Dr. Zahid Dar , MD

Internal Medicine - Hematology & Oncology

NPI 1003850645

Doctor of Medicine (M.D.)

Xing Kong , NP

Nurse Practitioner

NPI 1003896093

Nurse Practitioner

Michele Osborne , CRNA-MNA

Nurse Anesthetist, Certified Registered

NPI 1013024496

CRNAMNA

Erin Lamers , PT

Physical Therapist

NPI 1013229301

Physical Therapist

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

10 Historical Events
📍
Updated Business Mailing Address September 17, 2025

Registered at PO BOX 735044, CHICAGO, IL 606735044 (Tel: 8003252250)

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) September 17, 2025

Surgery (License #76035-21 in WI)

📍
Updated Practice Location September 02, 2025

Registered at 855 N WESTHAVEN DR, OSHKOSH, WI 549047668 (Tel: 9204566000)

📍
Updated Business Mailing Address September 02, 2025

Registered at N10474 CAMP SHAGINAPPI RD, MALONE, WI 530491207 (Tel: 9204707190)

NPI Profile Active May 06, 2020

NPI status registered as active in NPPES database

📍
Updated Practice Location May 06, 2020

Registered at 1000 N OAK AVE, MARSHFIELD, WI 544495702 (Tel: 7153879222)

📍
Updated Business Mailing Address May 06, 2020

Registered at 1106 ARLINGTON ST, MARSHFIELD, WI 544493539

👤
Provider Name / Credentials Updated May 06, 2020

Recorded as CATHERINE MAYER, DO

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) May 06, 2020

Student in an Organized Health Care Education/Training Program

🟢
Initial NPI Registration & Enumeration May 06, 2020

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1649891284
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 06, 2020
Last Update: September 17, 2025
Sole Proprietor: No

Mailing Address

Po Box 735044

Chicago, IL 606735044

Phone: 8003252250

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.