Sylvia Casas De Leon, MD
Cornea and External Diseases Specialist Physician · Reston, VA
Sylvia Casas De Leon, MD is a cornea and external diseases specialist physician with a practice address in Reston, Virginia, and NPI 1619362993, issued on Apr 2, 2015. Check the license (Virginia 0101268905, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Sylvia Casas De Leon
- Credential
- MD
- Primary taxonomy
- Cornea and External Diseases Specialist Physician 207WX0120X
- License numbers
- 0101268905 VA
297778 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1800 Town Center Dr Ste 317, Reston, VA 20190
- Phone
- (703) 437-3900
- Enumerated
- Apr 2, 2015
- Record last updated
- May 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (703) 437-9426
- Medicare enrollment
- Enrolled (PECOS I20200729002522); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2015
- Entity
- Type 1 · individual
Also registered at 1800 Town Center Dr Ste 317
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Siegel, M.D.Ophthalmology Physician1982045043
Verify Sylvia Casas De Leon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101268905Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average cornea and external diseases specialist physician in 2024
471 Medicare Part D claims for 170 beneficiaries, against an average of 1,263 among the 330 providers of this specialty who prescribed in Part D. Brand-name drugs were 48% of claims.
Most prescribed
- Latanoprost107 claims
- Cyclosporine41 claims
- Restasis40 claims
- Xiidra27 claims
- Dorzolamide-Timolol25 claims
- Timolol Maleate25 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: $857.62
26 payments; by number, the most common kind was food and beverage; the largest payer was Sun Pharmaceutical Industries Inc. The 284 providers of this specialty with any payment received $3,109.37 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
- Privia Medical Group, LLCReston, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cornea and External Diseases Specialist Physician providers in Virginia
There are 7 cornea and external diseases specialist physician records in Virginia.
Other cornea and external diseases specialist physician records in Virginia
- Donna Brown, M.D.Richmond, VA1386655165
- Bryan Goldman, MDHenrico, VA1205450004
- Khushali Shah, MD, MPHFairfax, VA1699352856
- Zachary Skurski, D.O.Fort Belvoir, VA1235519877
- Christine Tagayun, MD, MSMc Lean, VA1952747289
- Marin Zachary, RNNorfolk, VA1427914902
Common questions
What is Sylvia Casas De Leon, MD's NPI number?
Sylvia Casas De Leon, MD's National Provider Identifier (NPI) is 1619362993, issued on Apr 2, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Sylvia Casas De Leon, MD located?
The NPPES record lists a practice address at 1800 Town Center Dr Ste 317, Reston, VA, 20190. Phone: (703) 437-3900. Providers update this record themselves, so call before visiting.
How can I verify Sylvia Casas De Leon, MD's license?
NPPES lists Virginia license number 0101268905, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sylvia Casas De Leon, MD prescribe under Medicare Part D?
In 2024, Sylvia Casas De Leon, MD had 471 Medicare Part D claims for 170 beneficiaries; the average among cornea and external diseases specialist physician prescribers was 1,263. 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.