Lillian Khowong To, MD
Glaucoma Specialist (Ophthalmology) Physician · Pittsburgh, PA
Lillian Khowong To, MD is a glaucoma specialist (ophthalmology) physician with a practice address in Pittsburgh, Pennsylvania, and NPI 1487181848, issued on May 16, 2017. Check the license (Pennsylvania MD479080, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Lillian Khowong To
- Credential
- MD
- Primary taxonomy
- Glaucoma Specialist (Ophthalmology) Physician 207WX0009X
- License numbers
- MD479080 PA
RS2020-0565 NM
BP10060375 TX
Self-reported in NPPES; status is on the state search - Practice location
- 203 Lothrop St FL 8, Pittsburgh, PA 15213
- Phone
- (412) 647-2200
- Enumerated
- May 16, 2017
- Record last updated
- Sep 14, 2022
- Medicare enrollment
- Enrolled (PECOS I20221005001540); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest glaucoma specialist (ophthalmology) physician records → All 17 in Pennsylvania → Look up another NPI →
Also registered at 203 Lothrop St FL 8
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sabrina Mukhtar, MDCornea and External Diseases Specialist Physician1992239461
- Colin PrenskyRetina Specialist (Ophthalmology) Physician1255682217
- Andrew Williams, MDGlaucoma Specialist (Ophthalmology) Physician1669826681
Verify Lillian Khowong To in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD479080Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% fewer Medicare Part D claims than the average glaucoma specialist (ophthalmology) physician in 2024
2,143 Medicare Part D claims for 336 beneficiaries, against an average of 3,060 among the 430 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Latanoprost477 claims
- Dorzolamide-Timolol399 claims
- Brimonidine Tartrate254 claims
- Timolol Maleate153 claims
- Dorzolamide Hcl119 claims
- Lumigan91 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): 77.5 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: $450.59
4 payments; by number, the most common kind was food and beverage; the largest payer was New World Medical,inc. The 391 providers of this specialty with any payment received $5,284.60 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
- University OF Pittsburgh PhysiciansSewickley, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lillian Khowong To among 17 glaucoma specialist (ophthalmology) physician records in Pennsylvania
Lillian Khowong To, MD is one of 17 glaucoma specialist (ophthalmology) physician records with a practice address in Pennsylvania. 100% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 71% of them.
- NPI issued2017 · 71% of these records are older, 18% newer
- In a Medicare fileYes · 100% of these records are
- In the CMS Doctors and Clinicians fileYes · 88% of these records are
- Graduated2017 · median 2014 among the 15 with a school on file
- Record last updated2022 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0009X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Glaucoma Specialist (Ophthalmology) Physician providers in Pennsylvania
There are 17 glaucoma specialist (ophthalmology) physician records in Pennsylvania.
All 17 in Pennsylvania → Every provider in Pittsburgh → Glaucoma Specialist (Ophthalmology) Physician nationwide →
The 8 glaucoma specialist (ophthalmology) physician records with the nearest ZIP codes
- Andrew Williams, MDPittsburgh, PA 152131669826681
- Tadhg Schempf, MDSewickley, PA 151431376108092
- Shelley Mo, M.D.Lancaster, PA 176011265963458
- Stephen Hudock, MDSayre, PA 188401790753374
- Zachary NadlerAbington, PA 190011013477025
- Anfei Li, MDBala Cynwyd, PA 190041407477318
- Victoria Addis, M.D.Philadelphia, PA 191041972826584
- Qi Cui, M.D., PH.D.Philadelphia, PA 191041013205145
Common questions
What is Lillian Khowong To, MD's NPI number?
Lillian Khowong To, MD's National Provider Identifier (NPI) is 1487181848, issued on May 16, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Lillian Khowong To, MD located?
The NPPES record lists a practice address at 203 Lothrop St FL 8, Pittsburgh, PA, 15213. Phone: (412) 647-2200. Providers update this record themselves, so call before visiting.
How can I verify Lillian Khowong To, MD's license?
NPPES lists Pennsylvania license number MD479080, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Lillian Khowong To, MD prescribe under Medicare Part D?
In 2024, Lillian Khowong To, MD had 2,143 Medicare Part D claims for 336 beneficiaries; the average among glaucoma specialist (ophthalmology) physician prescribers was 3,060. Part D covers Medicare prescriptions only.
What is Lillian Khowong To, MD's MIPS final score?
The 2023 MIPS final score is 77.5 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.