NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1053802454 MD
Verify on CMS → Mary Tam, MD
Ophthalmology Physician in Danbury, Connecticut.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 22,082 in Ophthalmology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
1K
Medicare Part D claims · 531 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
52%
generic claims · 48% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
93.6/100
▲ 10 pts above national avg 83.1 · Exceptional
Industry payments
$1.4K
41 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mary Tam, MD reported a CMS MIPS final score of 93.6/100 - above the 83.1 national average - and filed 1,206 Medicare Part D claims in 2023.
- 93.6/100
- MIPS score · +10 vs avg
- 1K
- Part D claims, 2023
- 52%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Mary Tam, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
94 Top 29% higher than 71% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Mary Tam, MD sits
This provider among ophthalmology physician peers
Across the 9,866 ophthalmology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mary Tam, MD writes more Part D claims than 52% of them and scores higher on MIPS quality than 68% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one ophthalmology physician peer from a representative sample of 60; the gold marker is Mary Tam, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mary Tam, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Mary Tam, MD?
High performer (top quartile)Primary specialty
Ophthalmology Physician
Medicare Part D claims
1,206 15% vs specialty avg
MIPS final score
93.6/100 10.5 pts vs avg
Specialty distribution in Connecticut
How Ophthalmology Physician compares to other specialties among Connecticut providers
Medicare quality performance, MIPS
Mary Tam, MD's 2023 MIPS final score plotted against the Ophthalmology Physician national average
- MIPS Final Score
- 93.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Ophthalmology Physician) - 93.6/100 vs national avg 83.1
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Mary Tam, MD appears in the CMS NPPES registry as an Ophthalmology Physician provider holding MD credentials at 57 NORTH ST STE 415, Danbury, CT, 06810, with a listed phone of (203) 628-4995. NPI 1053802454 was issued on 05/22/2018.
Medicare Part D records for calendar year 2023 show 1,206 prescription claims written by this provider, covering 531 Medicare beneficiaries and totaling roughly $135K in drug spend, split 48% brand-name and 52% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 93.6/100 for the 2023 performance year (Quality 96.4, Cost 67.2), compared with the national average of 83.1.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,082 enrolled providers across 56 states and an average of 1,420 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1053802454 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/22/2018 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
93.5885
Final Score
Avg: 83.1
96.4104
Quality
67.218
Cost
78
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Mary Tam, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
According to CMS billing records, Mary Tam, MD is affiliated with 3 Medicare-billing facilities across 2 states.
Aran Eye Associates PA
Coral Gables, FL
Refocus Eye Health OF Central Connecticut PC
Danbury, CT
South Florida Vision Associates LLC
Ft Lauderdale, FL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Mary Tam, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.4K
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Above average
Mary Tam, MD - brand share 48.0%
Ophthalmology Physician average
48% brand-name claims vs 52% generic, on 1,206 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,206
Total Claims
$135K
Total Drug Cost
531
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,608
- Total Day Supply
- 40,711
- Brand vs Generic
- 48% brand / 52% generic
- Brand Drug Cost
- $113K
- Generic Drug Cost
- $22K
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 75.6 years
- Avg HCC Risk Score
- 1.72
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 25, 65-74: 214, 75-84: 221, 85+: 71
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mary Tam, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisolone Acetate
Prednisolone Acetate
219 claims
- Latanoprost
Latanoprost
166 claims
- Moxifloxacin
Moxifloxacin
164 claims
- Ketorolac Trometha…
Ketorolac Tromethamine
103 claims
- Dorzolamide-Timolol 70
Dorzolamide-Timolol
70 claims
- Brimonidine Tartrate 67
Brimonidine Tartrate
67 claims
- Lumigan 59
Lumigan
59 claims
- Dorzolamide Hcl 40
Dorzolamide Hcl
40 claims
| Drug | Claims |
|---|---|
| Prednisolone Acetate | 219 |
| Latanoprost | 166 |
| Moxifloxacin Moxifloxacin Hcl | 164 |
| Ketorolac Tromethamine | 103 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 70 |
| Brimonidine Tartrate | 67 |
| Lumigan Bimatoprost | 59 |
| Dorzolamide Hcl | 40 |
| Erythromycin Erythromycin Base | 34 |
| Ilevro Nepafenac | 28 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Mary Tam, MD fits within the Ophthalmology Physician landscape nationally.
22,082
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
Mary Tam, MD's 1,206 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Tam.
Dr. Michael Abrams
M.D.
Danbury, CT
Dr. Marcio Abreu
M.D.
Bridgeport, CT
Dr. Bruce Altman
M.D.
Danbury, CT
Dr. Laura Andrews
MD
Waterbury, CT
Shimy Apoorva
Waterbury, CT
Compare Ophthalmology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Connecticut medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ophthalmology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Mary Tam, MD's specialty? ▼
Mary Tam, MD specializes in Ophthalmology Physician and practices in Danbury, Connecticut. Credentials: MD.
How much does Mary Tam, MD prescribe under Medicare Part D? ▼
In 2023, Mary Tam, MD wrote 1,206 Medicare Part D claims totaling $135K in drug costs for 531 beneficiaries.
What is Mary Tam, MD's Medicare quality score? ▼
Mary Tam, MD has a CMS MIPS Final Score of 93.6/100 (Quality: 96.4, Cost: 67.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mary Tam, MD located? ▼
Mary Tam, MD is located at 57 NORTH ST STE 415, Danbury, CT, 06810. Phone: (203) 628-4995.
What is Mary Tam, MD's NPI number? ▼
Mary Tam, MD's National Provider Identifier (NPI) is 1053802454, issued on 05/22/2018.
Does Mary Tam, MD prescribe more brand-name or generic drugs? ▼
Mary Tam, MD's prescribing is 48% brand-name and 52% generic drugs by claim count, with $113K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,082 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does Mary Tam, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Tam, MD's most frequently prescribed drugs include Prednisolone Acetate, Latanoprost, Moxifloxacin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Tam, MD accept Medicare? ▼
Mary Tam, MD appears in CMS Medicare data with 1,206 Part D claims and 531 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Tam, MD's credentials? ▼
Mary Tam, MD's NPI is 1053802454 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.