2026 NPPES data Ophthalmology Physician NPI 1033386487 M.D.
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JANET TSUI, M.D.

Ophthalmology Physician in IOWA CITY, Iowa. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
2K
Medicare Part D claims · 555 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JANET TSUI, M.D. filed 2,459 Medicare Part D claims in 2023 as a Ophthalmology Physician in IOWA CITY, Iowa, prescribing 80% generic.

2K
Part D claims, 2023
80%
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.

JANET TSUI, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

2,459 Top 14% higher than 86% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

JANET TSUI, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — 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 JANET TSUI, M.D.?

Quality data not reported

NPI registry status

Active

Issued 05/14/2008

NPI 1033386487

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

2,459 73% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

Specialty distribution in Iowa

How Ophthalmology Physician compares to other specialties among Iowa providers

Iowa providers

Ophthalmology Physician share within Iowa

1. Ophthalmology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ophthalmology Physician share within Iowa

Specialty board-certification context

Estimated specialty board-certified rate — Ophthalmology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Ophthalmology Physician ABMS/AOA estimate

Est. board-certified rate (Ophthalmology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Ophthalmology Physician) — ABMS / AOA estimate

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).

JANET TSUI, M.D. appears in the CMS NPPES registry as a Ophthalmology Physician provider holding M.D. credentials at 200 HAWKINS DR, IOWA CITY, IA, 52242, with a listed phone of (415) 305-1942. NPI 1033386487 was issued on 05/14/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what TSUI most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 2,459 prescription claims written by this provider, covering 555 Medicare beneficiaries and totaling roughly $104K in drug spend, split 20% brand-name and 80% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 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

200 HAWKINS DR
IOWA CITY, IA 52242

Provider Details

NPI 1033386487
Specialty Ophthalmology Physician
Credentials M.D.
Gender Female
NPI Issued 05/14/2008

Hospital and facility affiliations

Facilities where JANET TSUI, M.D. 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.

PERMANENTE MEDICAL GROUP INC
SANTA CLARA, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

JANET TSUI, M.D. — brand share 20.0%
Specialty average (est.)

20% brand-name claims vs 80% generic, on 2,459 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.

2,459
Total Claims
$104K
Total Drug Cost
555
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,483
Total Day Supply
156,739
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$56K
Generic Drug Cost
$48K
Antibiotic Claims
57

Patient Demographics

Average Patient Age
77.9 years
Avg HCC Risk Score
1.11
Gender Split
62% female / 38% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What JANET TSUI, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Latanoprost
627
Prednisolone Acetate
340
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
260
Brimonidine Tartrate
224
Polymyxin B Sul-Trimethoprim
Polymyxin B Sulf/Trimethoprim
207
Dorzolamide Hcl
143
Diclofenac Sodium
132
Timolol Maleate
98
Cyclosporine
48
Doxycycline Monohydrate
42

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Ophthalmology Physician Overview

How JANET TSUI, M.D. fits within the Ophthalmology Physician landscape nationally.

22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider

JANET TSUI, M.D.'s 2,459 claims are above the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in Iowa

Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as TSUI.

Compare Ophthalmology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JANET TSUI, M.D.'s specialty?
JANET TSUI, M.D. specializes in Ophthalmology Physician and practices in IOWA CITY, Iowa. Credentials: M.D..
How much does JANET TSUI, M.D. prescribe under Medicare Part D?
In 2023, JANET TSUI, M.D. wrote 2,459 Medicare Part D claims totaling $104K in drug costs for 555 beneficiaries.
Where is JANET TSUI, M.D. located?
JANET TSUI, M.D. is located at 200 HAWKINS DR, IOWA CITY, IA, 52242. Phone: (415) 305-1942.
What is JANET TSUI, M.D.'s NPI number?
JANET TSUI, M.D.'s National Provider Identifier (NPI) is 1033386487, issued on 05/14/2008.
Does JANET TSUI, M.D. prescribe more brand-name or generic drugs?
JANET TSUI, M.D.'s prescribing is 20% brand-name and 80% generic drugs by claim count, with $56K in brand drug costs.
How many Ophthalmology Physician providers are there in the US?
There are 22,090 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 JANET TSUI, M.D. prescribe most often?
Based on 2023 Medicare Part D data, JANET TSUI, M.D.'s most frequently prescribed drugs include Latanoprost, Prednisolone Acetate, Dorzolamide-Timolol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JANET TSUI, M.D. accept Medicare?
JANET TSUI, M.D. appears in CMS Medicare data with 2,459 Part D claims and 555 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JANET TSUI, M.D.'s credentials?
JANET TSUI, M.D.'s NPI is 1033386487 with credentials M.D.. 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

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.
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