Quick answers
- Does Karen H. Chao accept Medicare assignment?
- Yes. Medicare's clinician data says Karen H. Chao accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Karen H. Chao see?
- In 2024, CMS data shows 119 Original Medicare patients and 418 services for Karen H. Chao. This counts Original Medicare only and measures volume, not quality.
- What is Karen H. Chao's NPI number?
- 1013953108. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Karen H. Chao, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 119 |
|---|---|
| Services billed to Medicare | 418 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Photography of the retina (92250)141 services
- Exam of visual field with intermediate testing (92082)112 services
- Established patient complete exam of visual system (92014)79 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)47 services
- New patient complete exam of visual system (92004)33 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure73%
- Arthritis38%
- Diabetes34%
- Ischemic heart disease27%
- Osteoporosis26%
Practice locations
Addresses where Karen H. Chao is enrolled with Medicare (CMS data updated October 2, 2026).
- 121 S Del Mar Ave, Suite ASan Gabriel, CA 91776 (626) 287‑0401
Group practices
Medicare enrollment lists Karen H. Chao as a member of this group (CMS data updated October 2, 2026).
- Sixth Optometric Care of California PC9 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in San Gabriel
Clinicians with the same Medicare primary specialty in San Gabriel, CA — not a recommendation.
Other clinicians in Sixth Optometric Care of California PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | Southern California College Of Optometry |
|---|---|
| Graduation year | 1994 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013953108 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians