William HaslerMD
Gastroenterology·Ann Arbor, MI
William Hasler, MD is a Gastroenterology provider in Ann Arbor, MI affiliated with 2 ambulatory surgery centers in AZ, as of July 2026.
- NPI1346322872
- Registered2006
- Centers2
- StateAZ
- Class of1983
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Ambulatory surgery centers
Centers whose service lines match this provider’s. Affiliations change; verify independently.
William Hasler at a glance
- Provider
- William Hasler
- Credential
- MD
- Specialty
- Gastroenterology
- Procedures
- Gastroenterology CPT codes
- Location
- Ann Arbor, MI
- Medical school graduation
- 1983
- NPI registered
- 2006
- NPI
- 1346322872
- 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 William Hasler practice?
William Hasler, MD is based in Ann Arbor, MI and is affiliated with 2 ambulatory surgery centers: North Valley Surgery Center in Scottsdale, AZ and Mayo Clinic Arizona Dba Mayo Clinic Scottsdale in Scottsdale, AZ. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is William Hasler's NPI number?
William Hasler's National Provider Identifier (NPI) is 1346322872, registered in 2006. Specialty on record: Gastroenterology; credential MD.
How many Gastroenterology providers in Michigan work at ambulatory surgery centers?
93 Gastroenterology surgeons and proceduralists in Michigan are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, William Hasler among them. The Michigan Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.
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