Physician Profile
Unclaimed ProfileAbout YI
David Hyungjun Yi, MD practices ophthalmology in Chelmsford, MA. David is a 1997 graduate of Baylor College of Medicine. Medicare claims data shows David provided 3,236 services to 2,731 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Yi specialize in?
Dr. Yi is an ophthalmology in Chelmsford, MA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OPHTHALMOLOGY”.
NPI registry
Where is Dr. Yi located?
Dr. Yi is listed at 19 VILLAGE SQ, Chelmsford, MA 01824. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Yi's phone number?
The number on file is (978) 256-5600. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Yi?
Dr. Yi's National Provider Identifier is 1003808197. 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. Yi go to medical school?
Dr. Yi attended Baylor College of Medicine, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Yi have?
Dr. Yi has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Yi do most often?
According to Medicare billing data, Dr. Yi performs procedures including removal of cataract with insertion of prosthetic lens, removal of recurring cataract in lens capsule using a laser and complex removal of cataract with insertion of prosthetic lens; reads or performs imaging such as ultrasound scan of cornea to determine thickness; provides treatments such as established patient complete exam of visual system and measurement of corneal curvature and depth of eye, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Yi's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Yi. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (978) 256-5600
- Email not available
Practice Locations
19 VILLAGE SQ
Chelmsford, MA 01824
Procedures Most Often Billed to Medicare
3,236 services · 2,731 patients · 15 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
319 |
| Removal of recurring cataract in lens capsule using a laser | Procedure | 66821 |
94 |
| Complex removal of cataract with insertion of prosthetic lens | Procedure | 66982 |
30 |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
17 |
| Established patient complete exam of visual system | Treatment | 92014 |
734 |
| Measurement of corneal curvature and depth of eye | Treatment | 92136 |
310 |
| Imaging of optic nerve | Treatment | 92133 |
308 |
| Exam of visual field with extended testing | Treatment | 92083 |
273 |
| Established patient problem focused exam of visual system | Treatment | 92012 |
125 |
| Imaging of retina | Treatment | 92134 |
65 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other ophthalmology specialists at this location 6
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
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.
More connections — 26 related providers in 4 groups
Other ophthalmology specialists in Chelmsford 2
Same specialty, same city.
Trained at Baylor College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1997 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 MA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.