Gregory SewallMD
Otolaryngology·Wausau, WI
Gregory Sewall, MD is an Otolaryngology provider in Wausau, WI, as of July 2026.
- NPI1336195023
- Registered2006
- Class of1999
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
Gregory Sewall at a glance
- Provider
- Gregory Sewall
- Credential
- MD
- Specialty
- Otolaryngology
- Procedures
- Otolaryngology CPT codes
- Location
- Wausau, WI
- Medical school
- Medical College of Wisconsin
- Graduated
- 1999
- NPI registered
- 2006
- NPI
- 1336195023
- Snapshot
- July 2026
Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.
Questions
Where does Gregory Sewall practice?
Gregory Sewall, MD is based in Wausau, WI. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Gregory Sewall's NPI number?
Gregory Sewall's National Provider Identifier (NPI) is 1336195023, registered in 2006. Specialty on record: Otolaryngology; credential MD.
Where did Gregory Sewall go to medical school?
Gregory Sewall, MD attended Medical College of Wisconsin, graduating in 1999.
How many Otolaryngology providers in Wisconsin work at ambulatory surgery centers?
37 Otolaryngology surgeons and proceduralists in Wisconsin are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Gregory Sewall among them. The Wisconsin Otolaryngology directory lists each one by city with credential, NPI, and center affiliations.
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