Summary

Dr. Gregory Sewall treats serous otitis media, eustachian tube problems, and tonsillitis, and performs endoscopic sinus surgery, nasal endoscopy, and nasal exams. He practices otolaryngology–head and neck surgery and surgery, with 27 years of experience.

Dr. Sewall earned his medical degree from the Medical College of Wisconsin and is affiliated with Aspirus Wausau Hospital. He sees patients in Wausau and Medford, Wisconsin. Patients on Vitals rate Dr. Sewall 3.83 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 3.8
  • 27 years of experience
  • 35 insurance plans accepted
  • speaks English
  • Medical College Of Wisconsin
  • 9 written reviews
  • 2 specialties
  • 10 areas of expertise
  • 1 hospital affiliation
  • 6 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Gregory Knowlton Sewall has 6 locations

Ent And Allergy Associates Sc

512 S 28th AveWausau, WI 54401
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Aspirus Medford Clinic

143 S Gibson StMedford, WI 54451
Mon7:00 am - 7:00 pm
Tue7:00 am - 7:00 pm
Wed7:30 am - 7:00 pm
Thu7:00 am - 7:00 pm
Fri7:30 am - 5:00 pm
SatClosed
SunClosed

Aspirus Wausau Hospital

333 Pine Ridge BlvdWausau, WI 54401

Aspirus Merrill Hospital

601 S Center AveMerrill, WI 54452

Wausau Surgery Center

3801 Stewart AveWausau, WI 54401
Mon6:30 am - 5:00 pm
Tue6:30 am - 5:00 pm
Wed6:30 am - 5:00 pm
Thu6:30 am - 5:00 pm
Fri6:30 am - 5:00 pm
SatClosed
SunClosed

Compare with Similar Doctors

Dr. Gregory Knowlton Sewall, MD
Dr. Steven T Weiland, MD
Dr. Benjamin James Herdrich, MD
Dr. Mark William Asplund Jr, MD
Dr. Gregory Knowlton Sewall, MDDr. Steven T Weiland, MDDr. Benjamin James Herdrich, MDDr. Mark William Asplund Jr, MD
Otolaryngology-Head & Neck SurgerySurgeryVascular SurgerySurgery
Accepts New Patients Accepts New Patients Accepts New Patients
3.8 
4.2 
4 
5 
27 Years of Experience 29 Years of Experience 22 Years of Experience 44 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English, Spanish Speaks English, Spanish
Wausau , WIWausau , WIWausau , WIEau Claire , WI
Med School: Medical College Of Wisconsin Med School: Medical College Of Wisconsin Med School: University Of Wisconsin School Of Medicine & Public Health Med School: University Of Wisconsin School Of Medicine And Public Health
Current Profile
View Profile View Profile View Profile

Insurance Plans Accepted by Dr. Gregory Knowlton Sewall

  • Accepts Medicare
  • Accepts Medicaid
  • Aetna
  • Allegiance Life and Health
  • AmeriGroup
  • AmeriHealth
  • Blue Cross Blue Shield
  • Centivo
  • CHAMPVA
  • Cigna
  • Dean Health Plan
  • GEHA
  • Golden Rule
  • Group Health Cooperative of Eau Claire
  • Group Health Cooperative of Eau Claire - Medicaid (Managed)
  • Health Alliance
  • HealthScope Benefits
  • Humana
  • Humana - Medicare
  • Humana - Medicare (Advantage HMO)
  • Medica
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)
  • Medicare
  • Medicare - Medicare
  • National Vision Administrators
  • Network Health Plan
  • PreferredOne
  • Sana
  • STLDentalPlan| LLC
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - Medicare (Advantage HMO)
  • UnitedHealthOne
  • Unity Health Insurance
  • Upper Peninsula Health Plan
  • WPS Health Plan

Medical Specialties

Dr. Gregory Knowlton Sewall has the following 2 specialties

Specialty Expertise

Dr. Gregory Knowlton Sewall has the following 10 areas of expertise

  • Allergies
  • Chronic Sinusitis
  • Deviated Septum
  • Facial Trauma
  • Hearing Loss
  • Polyps
  • Smell Disorders
  • Surgery
  • Swallowing Disorders
  • Tumors

Certifications, License, & Education

27 Years Experience

Dr. Gregory Knowlton Sewall holds an active medical license in the state of Wisconsin.

Medical License

Medical Doctor with an active medical license in the state of Wisconsin that expires in 2027.

Education & Training

Medical School

Graduated from Medical College Of Wisconsin in 1999.

NPI Number

Dr. Sewall's NPI number is 1336195023.

Similar doctors

Frequently Asked Questions

Does Dr. Gregory Sewall accept my insurance?
You can see the insurance plans that Dr. Gregory Sewall accepts on their Vitals profile.
What languages does Dr. Gregory Sewall speak?
Dr. Gregory Sewall speaks English.
Which hospitals is Dr. Gregory Sewall affiliated with?
Dr. Gregory Sewall is affiliated with Aspirus Wausau Hospital.
How can I make an appointment with Dr. Gregory Sewall?
You can find contact information for Dr. Gregory Sewall here on Vitals.
Is Dr. Gregory Sewall accepting new patients?
Dr. Gregory Sewall is accepting new patients on Vitals. View Dr. Gregory Sewall's profile on Vitals to make an appointment.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.