Physician Profile
Diana Chao, MD
Unclaimed ProfileAbout Dr. Chao
Diana Chao, MD practices ophthalmology in San Gabriel, CA. Diana is also listed as specializing in ophthalmology — glaucoma. According to Medicare claims data, Diana cared for 613 Medicare patients across 750 services. 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, imaging of optic nerve, and established patient complete exam of visual system.
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.
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
- (626) 534-6698
- Email not available
Practice Locations
7232 ROSEMEAD BLVD STE 202
San Gabriel, CA 91775
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
750 services · 613 patients · 7 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
15 | Less often than most peers in Ophthalmology |
| Imaging of optic nerve | Treatment | 92133 |
140 | As often as other peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
140 | Less often than most peers in Ophthalmology |
| Imaging of retina | Treatment | 92134 |
96 | As often as other peers in Ophthalmology |
| Exam of visual field with extended testing | Treatment | 92083 |
93 | As often as other peers in Ophthalmology |
| New patient complete exam of visual system | Treatment | 92004 |
43 | As often as other peers in Ophthalmology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
223 | As often as other peers in Ophthalmology |
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.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other eye doctors in San Gabriel 7
Same specialty, same city.
Also performs Ultrasound scan of cornea to determine thickness 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Chao specialize in?
Dr. Chao is an eye doctor in San Gabriel, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
Where is Dr. Chao located?
Dr. Chao is listed at 7232 Rosemead Blvd Ste 202, San Gabriel, CA 91775. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Chao's phone number?
The number on file is (626) 534-6698. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Chao's NPI number?
Dr. Chao's National Provider Identifier is 1528320298. 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
How long has Dr. Chao been practicing?
Dr. Chao has 14+ years experience. Registered with an NPI since 2012. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Dr. Chao do most often?
According to Medicare billing data, Dr. Chao performs imaging including ultrasound scan of cornea to determine thickness; provides treatments such as imaging of optic nerve and established patient complete exam of visual system, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Chao confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chao. 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.