Mary Wing Sum Tam, MD
Ophthalmology Physician · Danbury, CT
Mary Wing Sum Tam, MD is an ophthalmology physician with a practice address in Danbury, Connecticut, and NPI 1053802454, issued on May 22, 2018. Check the license (Connecticut 80895, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mary Wing Sum Tam
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- 80895 CT
ME163116 FL
275696 MA
960492 NY
T6053 TX
Self-reported in NPPES; status is on the state search - Practice location
- 57 North St Ste 415, Danbury, CT 06810
- Phone
- (203) 628-4995
- Enumerated
- May 22, 2018
- Record last updated
- Jul 23, 2025
- Medicaid IDs
- 119673400 FL
1053802454 CT - Medicare enrollment
- Enrolled (PECOS I20231016002533); may accept Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 336 in Connecticut → Look up another NPI →
Also registered at 57 North St Ste 415
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amanda Dinsmore, MDOphthalmology Physician1578806758
- Thuylinh Roschangar, O.D.Optometrist1487604617
Verify Mary Wing Sum Tam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 80895Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6.8 times the Medicare Part D claims of the average ophthalmology physician in 2024
10,260 Medicare Part D claims for 2,369 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 57% of claims.
Most prescribed
- Latanoprost2,113 claims
- Lumigan1,414 claims
- Prednisolone Acetate1,005 claims
- Brimonidine Tartrate865 claims
- Moxifloxacin691 claims
- Dorzolamide-Timolol682 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): 93.6 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).
Industry payments in 2024: $1,421.36
41 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 3 group practices
- Aran Eye Associates PACoral Gables, FL
- Refocus Eye Health OF Central Connecticut PCDanbury, CT
- South Florida Vision Associates LLCFt Lauderdale, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Wing Sum Tam among 336 ophthalmology physician records in Connecticut
Mary Wing Sum Tam, MD is one of 336 ophthalmology physician records with a practice address in Connecticut. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 93% of them.
- NPI issued2018 · 93% of these records are older, 5% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2018 · median 2000 among the 212 with a school on file
- Record last updated2025 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Connecticut
There are 336 ophthalmology physician records in Connecticut.
All 336 in Connecticut → Every provider in Danbury → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Yehuda Assouline, M.D.Danbury, CT 068101578514709
- Richard CasdenDanbury, CT 068101437113735
- Amanda Dinsmore, MDDanbury, CT 068101578806758
- Ralph Falkenstein, M.D.Danbury, CT 068101730187485
- Matthew Paul, M.D.Danbury, CT 068101417955865
- Paul Ruggiero, M.D.Danbury, CT 068101386642619
- Joan Draper, MDBrookfield, CT 068041952549099
- George Bullwinkel, M.D.Fairfield, CT 068241205917069
Common questions
What is Mary Wing Sum Tam, MD's NPI number?
Mary Wing Sum Tam, MD's National Provider Identifier (NPI) is 1053802454, issued on May 22, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Mary Wing Sum Tam, MD located?
The NPPES record lists a practice address at 57 North St Ste 415, Danbury, CT, 06810. Phone: (203) 628-4995. Providers update this record themselves, so call before visiting.
How can I verify Mary Wing Sum Tam, MD's license?
NPPES lists Connecticut license number 80895, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Wing Sum Tam, MD prescribe under Medicare Part D?
In 2024, Mary Wing Sum Tam, MD had 10,260 Medicare Part D claims for 2,369 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Mary Wing Sum Tam, MD's MIPS final score?
The 2023 MIPS final score is 93.6 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.