Nancy Nai-En Tsai, MD
Ophthalmology Physician · New York, NY
Nancy Nai-En Tsai, MD is an ophthalmology physician with a practice address in New York, New York, and NPI 1184732885, issued on Aug 25, 2006. Check the license (New York 194271, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Nancy Nai-En Tsai
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 194271 NY
Self-reported in NPPES; status is on the state search - Practice location
- 99 Elizabeth Street, 2FL, New York, NY 10013
- Phone
- (212) 227-8837
- Enumerated
- Aug 25, 2006
- Record last updated
- Mar 10, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 01663785 NY
- Medicare enrollment
- Enrolled (PECOS I20050207000641); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1992
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,822 in New York → Look up another NPI →
Verify Nancy Nai-En Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 194271Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.6 times the Medicare Part D claims of the average ophthalmology physician in 2024
11,587 Medicare Part D claims for 2,002 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 66% of claims.
Most prescribed
- Restasis3,221 claims
- Azelastine Hcl1,724 claims
- Bepotastine Besilate1,029 claims
- Latanoprost773 claims
- Xiidra607 claims
- Lumigan426 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.
Industry payments in 2024: $14,287.94
116 payments; by number, the most common kind was food and beverage; the largest payer was Amgen 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 one group practice
- Advanced Eye Physician PLLCNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nancy Nai-En Tsai among 1,822 ophthalmology physician records in New York
Nancy Nai-En Tsai, MD is one of 1,822 ophthalmology physician records with a practice address in New York. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1992 · median 1995 among the 1,215 with a school on file
- Record last updated2011 · 71% 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in New York
There are 1,822 ophthalmology physician records in New York.
All 1,822 in New York → Every provider in New York → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Ian Chan, MDNew York, NY 100131942406756
- Keith Chang, MDNew York, NY 100131588703995
- Peter Chen, M.D.New York, NY 100131114999349
- Raymond Fong, M.D.New York, NY 100131730181868
- Melissa Leung, M.D.New York, NY 100131982608444
- Andrew Naing, M.D.New York, NY 100131609968833
- Bingjing Roberts, M.D.New York, NY 100131184629503
- David ShuNew York, NY 100131053329342
Common questions
What is Nancy Nai-En Tsai, MD's NPI number?
Nancy Nai-En Tsai, MD's National Provider Identifier (NPI) is 1184732885, issued on Aug 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Nai-En Tsai, MD located?
The NPPES record lists a practice address at 99 Elizabeth Street, 2FL, New York, NY, 10013. Phone: (212) 227-8837. Providers update this record themselves, so call before visiting.
How can I verify Nancy Nai-En Tsai, MD's license?
NPPES lists New York license number 194271, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nancy Nai-En Tsai, MD prescribe under Medicare Part D?
In 2024, Nancy Nai-En Tsai, MD had 11,587 Medicare Part D claims for 2,002 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
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.