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There's No Place Like A (New) Home!

As of Tuesday, August 30, 2022, Oconomowoc patients will be seen at our new clinic located a few minutes northeast of our current clinic within the ProHealth Building. The new location address will be: 1360 Pabst Farms Cir Suite B, Oconomowoc, WI 53066

Serving Lake Country...

ADVENT Oconomowoc

It will take less than 60 seconds

Serving Lake Country...

ADVENT Oconomowoc

It will take less than 60 seconds

ENT Clinic in Oconomowoc, Wisconsin

Our Oconomowoc clinic is part of the rolling, lake-filled countryside of northwest Waukesha County, the area includes many lakes. ADVENT knows you want to be your best self. We understand your inability to breathe freely and sleep well hinders your quality of life, which is why we pioneered simple in-office sinus and snoring solutions to help you live the life you were meant to live.

Oconomowoc Clinic Details

Hours of Operation:






Monday: 7am-4:30pm

Tuesday: 7am-4:30pm

Wednesday: 8am-5:30pm

Thursday: 7am-4:30pm

Friday: CLOSED






We're In-Network With Most Insurance Plans:

  • Access Health
  • Aetna
  • The Alliance
  • Anthem/Blue Cross Blue Shield (BCBS)
  • Arise
  • Auxiant
  • Cigna
  • Coresource
  • Health EOS
  • HPS/HPS Solutions
  • Multiplan
  • Trilogy
  • UnitedHealthcare (UHC)
  • WPS


From the North or South:

  • Follow County Rd WS to WI-67 S in Rubicon
  • Continue on WI-67 S to Oconomowoc
  • Take Valley Rd to Pabst Farms Cir
  • Turn right onto Pabst Farms Cir and the ADVENT clinic will be on your right next to the Starbucks

From the East or West:

  • Get on I-41/US-41 S/US-45 S/WI-100 S from Good Hope Rd
  • Follow I-41/US-45 S and I-94 W to WI-67 N/Summit Ave in Oconomowoc. Take exit 282 from I-94 W
  • Continue on WI-67 N/Summit Ave. Take Oconomowoc Dr/Pabst Farms Blvd to Pabst Farms Cir
  • Turn left and the ADVENT Clinic will be on your left next to the Starbucks

What To Expect During Your First Appointment:

The inability to breathe or sleep well interferes with your ability to enjoy your day-to-day, leaving you feeling miserable and left out of your own life. As pioneers of the ENT field, our goal is to offer you expert medical care that meets not only your needs, but your busy lifestyle as well.

At your first visit, we'll focused on finding the facts with an exam to ensure we understand the root of your issue. We'll talk with you about your goals and design a that's plan specific to you. ADVENT is the only clinic that provides you with a complete Breathing Triangle® Evaluation. Your highly trained medical provider will immediately review the results with you and discuss a personalized plan to solve your issues.

Photos of the ADVENT Office in Oconomowoc

Oconomowoc, Wisconsin Clinic ENT Providers

R. Nikolaus Schmidt, MD

Board-Certified Otolaryngologist
Sinus and Sleep Surgeon

Alyssa Doerfert, PA-C

Physician Assistant

Tiffany Fontaine, PA-C

Physician Assistant

Matthew Peters, APNP

Nurse Practitioner

Lexi Thiel, PA-C

Physician Assistant

Oconomowoc Clinic FAQ

  1. Do I need a referral?
    Most insurance does not require a referral. If yours does, we can let you know.
  2. Do you accept my insurance?
    We are in-network with most insurance plans, including UnitedHealthcare, Anthem Blue Cross/Blue Shield, Aetna, Auxiant, WPS, Cigna, Humana, Ascension and more.
  3. How is ADVENT different than other clinics?
    One of the many reasons patients choose us is because we have a 99.7% referral rate. We also do something no other ENT clinic does: we give our patients a complete Breathing Triangle® Evaluation. This evaluation is unique to ADVENT and puts a 100% focus on your airway issues. This allows us to get to the root of your snoring or sinus issue. The Breathing Triangle® evaluation has helped over 31,000 ADVENT patients breathe and sleep better.
  4. What if I already tried to get help and nothing worked?
    After being dismissed by their primary care doctor or given a band-aid solution at a sleep center, many patients come to ADVENT. They find success here because of our proven process Breathing Triangle® evaluation and simple in-office solutions.
  5. How long will my appointment be?
    Your new patient appointment will be 30 minutes long. This visit is focused on finding the facts with an exam to ensure we understand the root of your issue. We'll discuss your goals and design a plan specific to you.