Physician Profile
Sylvia Casas de Leon, MD
Unclaimed ProfileAbout Dr. Casas de Leon
Based in Reston, VA, Sylvia Casas de Leon, MD is listed in the NPI registry under ophthalmology — cornea & external disease. Sylvia graduated from Baylor College of Medicine in 2015. Sylvia is also listed as specializing in ophthalmology and student in an organized health care education program. Medicare claims data shows Sylvia provided 1,879 services to 1,633 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient', and imaging of retina.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (703) 437-3900
- Email not available
Practice Locations
1800 TOWN CENTER DR STE 317
Reston, VA 20190
635 W 165th St # 96
New York, NY 10032
Conditions Commonly Evaluated or Treated
Within Ophthalmology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Cataracts
- Diabetic retinopathy
- Dry eye
- Glaucoma
- Macular degeneration
Cornea and external eye
- Blepharitis
- Corneal abrasion
- Corneal ulcer
- Keratoconus
- Pink eye
- Pterygium
Eyelid and tear drainage
- Blocked tear duct
- Chalazion
- Drooping eyelid
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
- Epiretinal membrane
- Retinal detachment
Eye injuries
- Foreign Object in Eye
Inflammation, neurologic, and orbit
- Thyroid eye disease
- Uveitis
Retina & vitreous
- Eye Floaters and Flashes
Procedures & services
Most searched procedures
- Cataract surgery
- Eye exam
- LASIK
- Retina surgery
Examination and imaging
- Corneal topography
- Fluorescein angiography
Cataract and lens
- Intraocular lens exchange
- YAG laser capsulotomy
Corneal procedures
- Amniotic Membrane Eye Graft
Eye diagnostics
- Optical Coherence Tomography Scan
Eye injuries
- Eye Scratch Laceration Repair
- Foreign Object Removal from Eye
Eyelid surgery
- Stye Removal
Eyelid, tear duct, and muscle
- Drooping-eyelid repair
- Entropion repair
- Eye-muscle surgery
- Eyelid surgery
- Tear-duct bypass surgery
Glaucoma
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Laser eye surgery
- Laser Floater Removal
Laser procedures
- Laser Treatment for Retinal Tear
Laser vision correction
- SMILE Eye Surgery
Refractive surgery
- Clear Lens Exchange
- Implantable Contact Lenses
Tear duct & Orbit
- Orbital Decompression Surgery
- Tear Duct Plugs
Procedures Most Often Billed to Medicare
1,879 services · 1,633 patients · 19 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
44 | Less often than most peers in Ophthalmology — Cornea &… |
| Closure of tear duct opening using plug | Procedure | 68761 |
24 | As often as other peers in Ophthalmology — Cornea &… |
| Ultrasound scan to determine eye length and lens power | Imaging | 76519 |
30 | Too few peers to compare |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
16 | Less often than most peers in Ophthalmology — Cornea &… |
| Imaging of retina | Treatment | 92134 |
300 | More than most peers in Ophthalmology — Cornea &… |
| Extended exam of the back part of the eye with optic nerve drawing | Treatment | 92202 |
180 | Too few peers to compare |
| Established patient complete exam of visual system | Treatment | 92014 |
108 | As often as other peers in Ophthalmology — Cornea &… |
| Exam of visual field with extended testing | Treatment | 92083 |
100 | More often than most peers in Ophthalmology — Cornea &… |
| Imaging of optic nerve | Treatment | 92133 |
76 | As often as other peers in Ophthalmology — Cornea &… |
| Measurement of corneal curvature and depth of eye | Treatment | 92136 |
36 | Less often than most peers in Ophthalmology — Cornea &… |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Baylor College of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2015 at Baylor College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of cataract with insertion of prosthetic lens 8
Providers in VA who bill this service to Medicare most often.
Common questions
What does Dr. Casas de Leon specialize in?
Dr. Casas de Leon is an eye doctor in Reston, VA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology — Cornea & External Disease”.
NPI registry
Where is Dr. Casas de Leon located?
Dr. Casas de Leon is listed at 1800 Town Center Dr Ste 317, Reston, VA 20190. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Casas de Leon's phone number?
The number on file is (703) 437-3900. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Casas de Leon?
Dr. Casas de Leon's National Provider Identifier is 1619362993. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Casas de Leon go to medical school?
Dr. Casas de Leon attended Baylor College of Medicine, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Casas de Leon have?
Dr. Casas de Leon has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Casas de Leon do most often?
According to Medicare billing data, Dr. Casas de Leon performs procedures including removal of cataract with insertion of prosthetic lens and closure of tear duct opening using plug; reads or performs imaging such as ultrasound scan to determine eye length and lens power and ultrasound scan of cornea to determine thickness; provides treatments such as imaging of retina and extended exam of the back part of the eye with optic nerve drawing, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Casas de Leon's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Casas de Leon. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.