Timothy Tianma Xu, MD
Ophthalmology Physician · Philadelphia, PA
Timothy Tianma Xu, MD is an ophthalmology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1699351635, issued on Mar 21, 2021. Check the license (Pennsylvania MD488897, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Timothy Tianma Xu
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- MD488897 PA
31532 MN
Self-reported in NPPES; status is on the state search - Practice location
- 840 Walnut St Ste 1020, Philadelphia, PA 19107
- Phone
- (800) 331-6634
- Enumerated
- Mar 21, 2021
- Record last updated
- Jun 23, 2025
- Medicare enrollment
- Enrolled (PECOS I20220803000087); accepts Medicare assignment
- Medical or professional school
- Mayo Medical School, 2021
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,088 in Pennsylvania → Look up another NPI →
Also registered at 840 Walnut St Ste 1020
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Timothy Tianma Xu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD488897Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average ophthalmology physician in 2024
417 Medicare Part D claims for 143 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Latanoprost85 claims
- Prednisolone Acetate79 claims
- Ketorolac Tromethamine55 claims
- Dorzolamide-Timolol31 claims
- Moxifloxacin29 claims
- Ofloxacin28 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: $147.77
1 payment: food and beverage; the largest payer was Sight Sciences, 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 3 group practices
- Mayo ClinicRochester, MN
- Retinovitreous Associates LtdPhiladelphia, PA
- Wills Eye Ophthalmology Clinic, IncPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Tianma Xu among 1,088 ophthalmology physician records in Pennsylvania
Timothy Tianma Xu, MD is one of 1,088 ophthalmology physician records with a practice address in Pennsylvania. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 94% of them.
- NPI issued2021 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2021 · median 2000 among the 734 with a school on file
- Record last updated2025 · 64% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Pennsylvania
There are 1,088 ophthalmology physician records in Pennsylvania.
All 1,088 in Pennsylvania → Every provider in Philadelphia → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Yelena Doych, MDPhiladelphia, PA 191071669419545
- Alan Forman, M.D.Philadelphia, PA 191071174524771
- Janice Gault, MDPhiladelphia, PA 191071780673137
- Kammi GuntonPhiladelphia, PA 191071750383600
- Julia Haller, M.D.Philadelphia, PA 191071871542514
- Daniel Kane, MDPhiladelphia, PA 191071700847282
- Lawrence Kenney, M.D.Philadelphia, PA 191071972582633
- Peter Laibson, MDPhiladelphia, PA 191071194723841
Common questions
What is Timothy Tianma Xu, MD's NPI number?
Timothy Tianma Xu, MD's National Provider Identifier (NPI) is 1699351635, issued on Mar 21, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Tianma Xu, MD located?
The NPPES record lists a practice address at 840 Walnut St Ste 1020, Philadelphia, PA, 19107. Phone: (800) 331-6634. Providers update this record themselves, so call before visiting.
How can I verify Timothy Tianma Xu, MD's license?
NPPES lists Pennsylvania license number MD488897, 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 Timothy Tianma Xu, MD prescribe under Medicare Part D?
In 2024, Timothy Tianma Xu, MD had 417 Medicare Part D claims for 143 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.