NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1912961335 MD
Verify on CMS → Kailenn Tsao, MD
Ophthalmology Physician in Winchester, Massachusetts.
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
526
Medicare Part D claims · 137 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
96.2/100
▲ 13 pts above national avg 83.1 · Exceptional
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
Kailenn Tsao, MD reported a CMS MIPS final score of 96.2/100 - above the 83.1 national average - and filed 526 Medicare Part D claims in 2023.
- 96.2/100
- MIPS score · +13 vs avg
- 526
- Part D claims, 2023
- 78%
- 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.
Kailenn Tsao, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
96 Top 17% higher than 83% 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 Kailenn Tsao, 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, Kailenn Tsao, MD writes more Part D claims than 27% of them and scores higher on MIPS quality than 75% - placing this provider in the lower-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 Kailenn Tsao, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Kailenn Tsao, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Kailenn Tsao, MD?
High performer (top quartile)Primary specialty
Ophthalmology Physician
Medicare Part D claims
526 63% vs specialty avg
MIPS final score
96.2/100 13.1 pts vs avg
Specialty distribution in Massachusetts
How Ophthalmology Physician compares to other specialties among Massachusetts providers
Medicare quality performance, MIPS
Kailenn Tsao, MD's 2023 MIPS final score plotted against the Ophthalmology Physician national average
- MIPS Final Score
- 96.2/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Ophthalmology Physician) - 96.2/100 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).
Kailenn Tsao, MD appears in the CMS NPPES registry as an Ophthalmology Physician provider holding MD credentials at 955 MAIN ST, Winchester, MA, 01890, with a listed phone of (781) 729-7401. NPI 1912961335 was issued on 04/13/2006.
Medicare Part D records for calendar year 2023 show 526 prescription claims written by this provider, covering 137 Medicare beneficiaries and totaling roughly $51K in drug spend, split 22% brand-name and 78% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 96.2/100 for the 2023 performance year (Quality 92.4), 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 | 1912961335 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/13/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
96.1983
Final Score
Avg: 83.1
92.3965
Quality
Reporting: Individual
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Kailenn Tsao, MD. To verify Kailenn Tsao, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Kailenn Tsao, MD - brand share 22.0%
Ophthalmology Physician average
22% brand-name claims vs 78% generic, on 526 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.
526
Total Claims
$51K
Total Drug Cost
137
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 923
- Total Day Supply
- 24,728
- Brand vs Generic
- 22% brand / 78% generic
- Brand Drug Cost
- $31K
- Generic Drug Cost
- $20K
Patient Demographics
- Average Patient Age
- 78.4 years
- Avg HCC Risk Score
- 1.00
- Gender Split
- 71% female / 29% male
- Age Distribution
- <65: 0, 65-74: 35, 75-84: 78, 85+: 24
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Kailenn Tsao, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
135 claims
- Ketorolac Trometha…
Ketorolac Tromethamine
63 claims
- Erythromycin
Erythromycin
62 claims
- Tobramycin-Dexamet… 51
Tobramycin-Dexamethasone
51 claims
- Timolol Maleate 40
Timolol Maleate
40 claims
- Prednisolone Acetate 27
Prednisolone Acetate
27 claims
- Dorzolamide Hcl 20
Dorzolamide Hcl
20 claims
- Combigan 18
Combigan
18 claims
| Drug | Claims |
|---|---|
| Latanoprost | 135 |
| Ketorolac Tromethamine | 63 |
| Erythromycin Erythromycin Base | 62 |
| Tobramycin-Dexamethasone Tobramycin/Dexamethasone | 51 |
| Timolol Maleate | 40 |
| Prednisolone Acetate | 27 |
| Dorzolamide Hcl | 20 |
| Combigan Brimonidine Tartrate/Timolol | 18 |
| Brimonidine Tartrate | 17 |
| Brimonidine Tartrate-Timolol Brimonidine Tartrate/Timolol | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Kailenn Tsao, 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
Kailenn Tsao, MD's 526 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Tsao.
Dr. Mark Abelson
M.D.
Andover, MA
Dr. Inas Aboobakar
M.D.
Boston, MA
Dr. Alessandro Adad Jammal
MD, PHD
Boston, MA
Dr. David Agahigian
M.D.
Springfield, MA
Dr. Kanika Agarwal
MD
Boston, MA
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 Massachusetts 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 Kailenn Tsao, MD's specialty? ▼
Kailenn Tsao, MD specializes in Ophthalmology Physician and practices in Winchester, Massachusetts. Credentials: MD.
How much does Kailenn Tsao, MD prescribe under Medicare Part D? ▼
In 2023, Kailenn Tsao, MD wrote 526 Medicare Part D claims totaling $51K in drug costs for 137 beneficiaries.
What is Kailenn Tsao, MD's Medicare quality score? ▼
Kailenn Tsao, MD has a CMS MIPS Final Score of 96.2/100 (Quality: 92.4). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Kailenn Tsao, MD located? ▼
Kailenn Tsao, MD is located at 955 MAIN ST, Winchester, MA, 01890. Phone: (781) 729-7401.
What is Kailenn Tsao, MD's NPI number? ▼
Kailenn Tsao, MD's National Provider Identifier (NPI) is 1912961335, issued on 04/13/2006.
Does Kailenn Tsao, MD prescribe more brand-name or generic drugs? ▼
Kailenn Tsao, MD's prescribing is 22% brand-name and 78% generic drugs by claim count, with $31K 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 Kailenn Tsao, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Kailenn Tsao, MD's most frequently prescribed drugs include Latanoprost, Ketorolac Tromethamine, Erythromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kailenn Tsao, MD accept Medicare? ▼
Kailenn Tsao, MD appears in CMS Medicare data with 526 Part D claims and 137 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kailenn Tsao, MD's credentials? ▼
Kailenn Tsao, MD's NPI is 1912961335 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.