Mark T Duffy
MD | Ophthalmologist | 34+ years Exp
Medicare Enrolled 2253 W Mason St, Green Bay
Wisconsin, 54303-4706
920-327-7000 920-327-7005
Maps & DirectionsMark T Duffy is a Green Bay, Wisconsin based Ophthalmologist with 34 years of experience in Ophthalmology. He completed his graduation from University Of Illinois College Of Med (chi/peor/rock/chm-urb) in 1992. He is also affiliated with hospitals like Aurora Baycare Medical Ctr and Bell Hospital. He accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of Mark T Duffy is 47208 for Ophthalmic Plastic and Reconstructive Surgery in Wisconsin.
Mark T Duffy has the knowledge and professional skills needed to provide comprehensive eye and vision care. He is medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Complete Profile:
Mark T Duffy speciality, credentials, practice address, contact phone number and fax are as below.
Patients can directly walk in or can call on the below given phone number for appointment.
| Specialization: | Ophthalmology |
| Credentials: | MD |
| Experience: | 34+ years |
| Medical School Attended: | University Of Illinois College Of Med (chi/peor/rock/chm-urb) |
| Graduation Year: | 1992 |
| Gender: | Male |
| Accepts Medicare Assignment: | Yes |
| Practice Address: | 2253 W Mason St, Green Bay,
Wisconsin, 54303-4706 |
| Phone: | 920-327-7000 |
| Fax: | 920-327-7005 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| PAC ID: | 3678549607 |
| Enrollment ID: | I20040909001085 |
| NPI Number: | 1235167537 |
| NPI Enumeration Date: | 28 Jun, 2006 |
| NPI Last Update On: | 21 Apr, 2026 |
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Mark T Duffy are as mentioned below.
| License Number | Specialization | State | Status | |
| 47208 | Ophthalmic Plastic and Reconstructive Surgery | Wisconsin | Primary | |
| 47208 | Ophthalmology | Wisconsin | Secondary | |
Hospital Affiliation:
Doctors can be affiliated to many hospitals whom they worked with in the past or are presently working with. One surgeon can be affiliated to four to five hospitals at a time.
| Hospital Name (CCN) | State | Hospital Type |
| Aurora Baycare Medical Ctr (520193) | Green bay, WI | Acute Care Hospital |
| Bell Hospital (231321) | Ishpeming, MI | Critical Access Hospital |
| Dickinson County Memorial Hospital (230055) | Iron mountain, MI | Acute Care Hospital |
Group Practice:
Group practices are run by a group of physicians who share their premises and other resources. Following list states all the group name
with which Mark T Duffy has association with along with the number of members in that group.
| Organization Name (Group PAC ID) | Members |
| Baycare Clinic Llp (4385554328) | 175 |
Other Medical Identifiers:
Other legacy medical identifiers associated with Mark T Duffy such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
| Identifier | Type | State | Issuer |
| 34564300 | Medicaid | Wisconsin | |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | 1035 Kepler Dr,
Green Bay, Wisconsin |
| Zip: | 54311-8320 |
| Phone Number: | 920-490-9046 |
| Fax Number: | 920-405-8005 |
Patients can reach Mark T Duffy at
2253 W Mason St, Green Bay, Wisconsin or can
call to book an appointment on 920-327-7000.
Comments/ Reviews:
Patients can read all the reviews posted for Mark T Duffy below. You may also share your own experience like the quality of treatment, behavior, and overall care provided by Mark T Duffy. It will help others make informed decisions.
** Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 08 June, 2026.