Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William B Hass, OD

Individual provider Optometrist · NPI 1972598258

Dr. William B Hass, OD is an Optometry in Chesaning, Michigan. Graduated from Illinois College of Optometry at Chicago in 1976, 50 years ago. Practices with Robert and William Hass Optometrists Professional Corp, a 3-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
50
Trained at
Illinois College of Optometry at Chicago
Licensed in
MI
In the registry since
2005
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1180 W Broad St
Chesaning, MI 48616-1006
Phone: (989) 845-3835
Fax: (989) 845-3982
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 4901002552 (MI)

Record details

NPI number1972598258
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedSeptember 13, 2005
Last updated in NPPESMay 30, 2008
Mailing addressPo Box 68, Chesaning, MI 48616-0068

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolILLINOIS COLLEGE OF OPTOMETRY AT CHICAGO
Graduated 1976 (50 years in practice)
Group practice Robert And William Hass Optometrists Professional Corp — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Chesaning