Mark T. Duffy, MD
Ophthalmic Plastic and Reconstructive Surgery Physician · Green Bay, WI
Mark T. Duffy, MD is an ophthalmic plastic and reconstructive surgery physician with a practice address in Green Bay, Wisconsin, and NPI 1235167537, issued on Jun 28, 2006. Check the license (Wisconsin 47208, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mark T. Duffy
- Credential
- MD
- Primary taxonomy
- Ophthalmic Plastic and Reconstructive Surgery Physician 207WX0200X
- License number
- 47208 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2253 W Mason St, Green Bay, WI 54303
- Phone
- (920) 327-7000
- Enumerated
- Jun 28, 2006
- Record last updated
- Apr 21, 2026
- Fax
- (920) 327-7005
- Medicaid ID
- 34564300 WI
- Medicare enrollment
- Enrolled (PECOS I20040909001085); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1992
- Entity
- Type 1 · individual
8 nearest ophthalmic plastic and reconstructive surgery physician records → All 9 in Wisconsin → Look up another NPI →
Also registered at 2253 W Mason St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Alexander, M.D.Pediatrics Physician1780737155
- Madeline Almond, MDOphthalmology Physician1720098288
- Catharine Aune, CRNPNurse Practitioner1437573086
- Brianna Baeten, PAPhysician Assistant1194358648
- Heidi Bergman, PT, DPTPhysical Therapist1073130670
- Joseph Bergmann, M.D.Glaucoma Specialist (Ophthalmology) Physician1265623649
Verify Mark T. Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 47208Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% more Medicare Part D claims than the average ophthalmic plastic and reconstructive surgery physician in 2024
929 Medicare Part D claims for 482 beneficiaries, against an average of 544 among the 409 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims. 156 claims were for opioids.
Most prescribed
- Erythromycin487 claims
- Cephalexin199 claims
- Hydrocodone-Acetaminophen151 claims
- Azithromycin44 claims
- Prednisolone Acetate11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 77.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Baycare Clinic LLPGreen Bay, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ophthalmic Plastic and Reconstructive Surgery Physician providers in Wisconsin
There are 9 ophthalmic plastic and reconstructive surgery physician records in Wisconsin.
All 9 in Wisconsin → Every provider in Green Bay → Ophthalmic Plastic and Reconstructive Surgery Physician nationwide →
The 8 ophthalmic plastic and reconstructive surgery physician records with the nearest ZIP codes
- Jack Komro, DOGreen Bay, WI 543031134700719
- Cathy Burkat, MDMadison, WI 537051386610871
- Mark Lucarelli, MDMadison, WI 537051992771034
- Neda Esmaili, M.D.Milwaukee, WI 532261790900363
- Gerald Harris, MDMilwaukee, WI 532261629029467
- Sang Hong, MDMilwaukee, WI 532261124079959
- Bruce Massaro, M.D.Milwaukee, WI 532261598828410
- Timothy Wells, MDMilwaukee, WI 532261225080542
Common questions
What is Mark T. Duffy, MD's NPI number?
Mark T. Duffy, MD's National Provider Identifier (NPI) is 1235167537, issued on Jun 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark T. Duffy, MD located?
The NPPES record lists a practice address at 2253 W Mason St, Green Bay, WI, 54303. Phone: (920) 327-7000. Providers update this record themselves, so call before visiting.
How can I verify Mark T. Duffy, MD's license?
NPPES lists Wisconsin license number 47208, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark T. Duffy, MD prescribe under Medicare Part D?
In 2024, Mark T. Duffy, MD had 929 Medicare Part D claims for 482 beneficiaries; the average among ophthalmic plastic and reconstructive surgery physician prescribers was 544. Part D covers Medicare prescriptions only.
What is Mark T. Duffy, MD's MIPS final score?
The 2023 MIPS final score is 77.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.