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DR. DIANA CHAO MD
NPI 1528320298
Ophthalmology in San Gabriel, CA

Active since June 08, 2012PECOS Enrolled
7232 ROSEMEAD BLVD STE 202, SAN GABRIEL, CA 91775(626) 534-6698 Get Directions Write a Review

NPPES record last updated: January 19, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jan 19, 2026, Feb 7, 2022, Feb 7, 2017 (3 updates tracked since 2017).

About Dr. Diana Chao Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DIANA CHAO MD (NPI 1528320298) is an individual ophthalmology provider in San Gabriel, California, licensed in California (A135726) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1528320298
Entity TypeIndividualFemale
Primary Taxonomy207W00000X
Provider Legal NameDR. DIANA CHAOCredential: MD
Location Address7232 ROSEMEAD BLVD STE 202San Gabriel, CA 91775-1389
Mailing AddressPo Box 396Temple City, CA 91780-0396
Phone(626) 534-6698
Sole ProprietorNo
Enumeration DateJune 8, 2012
Last NPPES UpdateJanuary 19, 20263 updates tracked since enumeration
NPPES CertifiedJanuary 19, 2026
✔ NPI 1528320298 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in CA · A135726
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Also ListedOphthalmology · Glaucoma SpecialistTaxonomy 207WX0009X · License A135726 (CA)
7232 ROSEMEAD BLVD STE 202, San Gabriel, CA 91775
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Other Names 1

Former Name (1)Diana Hung

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Diana Chao Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
223 services148 patients
Established patient complete exam of visual system 92014
An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.
140 services123 patients
Imaging of optic nerve 92133
Imaging of the optic nerve is a non-invasive procedure that captures detailed pictures of your optic nerve. It helps doctors assess eye health, particularly for conditions like glaucoma. It's painless, quick, and uses safe technology like MRI or OCT (Optical Coherence Tomography).
140 services124 patients
Imaging of retina 92134
Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.
96 services77 patients
Exam of visual field with extended testing 92083
An extended visual field exam is a detailed test to evaluate your peripheral (side) vision. It helps to detect any potential blind spots which may not be noticeable in daily life. These could be caused by eye diseases like glaucoma, or neurological conditions.
93 services83 patients
New patient complete exam of visual system 92004
A new patient complete exam of the visual system is a thorough evaluation of your eyes and vision. It checks for any potential issues and assesses overall eye health. It includes tests for visual acuity, eye movement, and light response.
43 services43 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91775 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

INTELLIGENT EYE CARE CORP
Ophthalmology
7232 ROSEMEAD BLVD STE 202
SAN GABRIEL, CA 91775
Los Angeles County (626) 534-6698

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Diana Chao's NPI number?

The NPI number for Diana Chao is 1528320298. It was assigned to this individual provider in the NPPES registry on June 8, 2012. The provider is also known as Diana Hung.

Where is Diana Chao located?

Diana Chao practices at 7232 Rosemead Blvd Ste 202, San Gabriel, CA 91775. The listed phone number is (626) 534-6698.

What is Diana Chao's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Diana Chao enrolled in Medicare?

Yes. Diana Chao is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Diana Chao was last updated on January 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.