Dr. Celia Difan Chao, DO
- Medicare services, 2022
- 2,663
- Part D claims, 2024
- 2,074
- Industry payments
- $1,046
- Affiliated sites
- 4
- Medical groups
- 3
- Practice address
- 1315 Las Tablas Rd, Templeton, CA 93465
- Practice phone
- Call (805) 434-2533
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sani Eye Surgery Center
Surgery Center - Medicare-Certified · Templeton, California
Find Dr. Chao's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Celia Difan Chao is an ophthalmologist in Templeton, California
Dr. Chao practices at Sani Eye Surgery Center in Templeton, California.
Dr. Chao's NPI, 1447600309, was assigned on June 21, 2016. Dr. Chao graduated from Touro University California - Vallejo in 2016. Dr. Chao holds California license 20A16425.
- NPI
- 1447600309NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971926551
- NPI enumeration date
- June 21, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 434-2533
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Celia Difan Chao practices at Sani Eye Surgery Center in Templeton, California
Dr. Chao's primary practice is Sani Eye Surgery Center, at 1315 Las Tablas Rd, Templeton, CA 93465. The practice phone is (805) 434-2533.
- Sani Eye Surgery Center1315 Las Tablas Rd, Templeton, CA 93465Phone(805) 434-2533
Source: Dmand AI Affiliation Data
Dr. Celia Difan Chao is affiliated with 4 sites of care and 3 medical groups
Dr. Chao's primary practice is Sani Eye Surgery Center in Templeton, California. Dmand AI also links Dr. Chao to 3 group practices and clinics and 3 medical groups, each named with a free account. Dr. Chao's employer is on file too: a surgery center (asc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Celia Difan Chao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chao practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sani Eye Surgery Center | Available with a free account |
| +3 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Celia Difan Chao is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Chao's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Chao is board certified in ophthalmology by the AOA Board of Ophthalmology and Otolaryngology. Dmand AI has Dr. Chao's licenses on file in 2 states: California and North Carolina.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Student in an organized health care education/training program, North Carolina
Clinical focus
Dmand AI lists cataract surgery with lens implant, cold sores or genital herpes, conjunctivitis, dry eye, eyelid inflammation, glaucoma surgery, hypertensive retinopathy and secondary membranaous cataract surgery among the conditions Dr. Chao treats.
Ophthalmologists near Dr. Chao
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Celia Difan Chao billed Medicare for 2,663 services in 2022
CMS data shows 2,663 Medicare services from Dr. Chao across 16 procedure codes in 2022. Medicare paid $155,561 for them.
Dr. Chao's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Tests and treatments
- 2021: 1,4562022: 1,59710%
- Office and hospital visits
- 2021: 7062022: 85020%
- Surgery
- 2021: 1002022: 11212%
- Drugs given in the office
- 2021: 332022: 5258%
- Imaging
- 2021: 562022: 527%
Where Dr. Chao's Medicare services took place, 2022
- In an office2,60398%
- In a facility602%
Dr. Chao compared with the California median for ophthalmologists, 2022
- Dr. Chao
- California median
- Medicare services
- 2,663vs 1,0792.5 times
- Part D claims
- 2,018vs 6183.3 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Chao's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chao and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Celia Difan Chao's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Chao's median patient age at 70, with 54% women.
Dr. Chao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women54%
- Men45%
Source: Dmand AI Patient Panel Data
Dr. Celia Difan Chao wrote 2,074 Medicare Part D claims in 2024
In 2024, Dr. Chao wrote 2,074 Medicare Part D claims for 473 patients. 57% of them were for generic drugs. CMS names the drug for 2,018 of them, across 18 drugs with 11 or more claims each, at $154,490 in total drug cost. In 2023, CMS named 1,162 claims across 14 drugs.
Dr. Chao's Part D claims by kind of drug, 2024
- Generic1,181 claims57%
- Brand-name893 claims43%
Dr. Chao's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1622024: 2,01874%
Drugs named by CMS: 18 in 2024, 14 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Celia Difan Chao ranks in the 51st percentile for cataract surgery in Medicare
Dr. Chao accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 27 procedures of cataract surgery by Dr. Chao, more than 51% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Chao ranks in Medicare procedure volume
- Cataract surgery
- 51st percentile27 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Celia Difan Chao received $1,046 in industry payments from 2018 to 2025
CMS Open Payments shows 25 general payments to Dr. Chao from 9 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $715.
General payments to Dr. Chao by program year, 2018 to 2025
Companies that paid Dr. Chao the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Celia Difan Chao graduated from Touro University California - Vallejo
Dr. Chao graduated from Touro University California - Vallejo in 2016.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Celia Difan Chao accepts plans from 8 insurance carriers
Dr. Chao is in network with 8 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Humana. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Humana
- HCSC
- Molina
- Regence Health Plans
- CMS Medicare
- Elevance
Plan types Dr. Chao accepts, by number of carriers
- Medicare7
- HMO5
- PPO5
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Celia Difan Chao's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Celia Difan Chao
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Celia Difan Chao's NPI number?
Dr. Celia Difan Chao's NPI number is 1447600309. It was assigned on June 21, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Celia Difan Chao?
Dr. Celia Difan Chao is an ophthalmologist in Templeton, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Celia Difan Chao practice?
Dr. Chao practices at 1315 Las Tablas Rd, Templeton, CA 93465. Dr. Chao's primary practice is Sani Eye Surgery Center in Templeton, California. Dmand AI also links Dr. Chao to 3 group practices and clinics and 3 medical groups.
What is Dr. Celia Difan Chao's office phone number?
The practice phone on file for Dr. Chao is (805) 434-2533.
What is Dr. Celia Difan Chao's medical license number?
Dr. Chao holds California license 20A16425, one of the licenses on file in 2 states.
Which states has Dr. Celia Difan Chao been licensed in?
Dmand AI has state licenses on file for Dr. Chao in California (2018 to 2026) and North Carolina (2016 to 2017).
Does Dr. Celia Difan Chao accept Medicare?
Yes. CMS data shows Dr. Chao billed Medicare for 2,663 services in 2022, and Dr. Chao accepts Medicare assignment.
Is Dr. Celia Difan Chao board certified?
Yes. Dr. Chao is board certified in ophthalmology by the AOA Board of Ophthalmology and Otolaryngology.
What services does Dr. Celia Difan Chao bill to Medicare?
In 2022, Dr. Chao's most billed Medicare services were office visit, established patient (99214), eye exam or test (92134) and eye exam or test (92201).
Where did Dr. Celia Difan Chao go to medical school?
Dr. Chao graduated from Touro University California - Vallejo in 2016.
Show 4 more questionsShow fewer questions
What drugs does Dr. Celia Difan Chao prescribe most?
In 2024 Medicare Part D data, Dr. Chao's most prescribed drugs by claims were Latanoprost, Prednisolone Acetate and Diclofenac Sodium.
Has Dr. Celia Difan Chao received payments from drug or device companies?
CMS Open Payments shows $1,046 in general payments to Dr. Chao from 9 companies from 2018 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Celia Difan Chao been practicing?
Dr. Chao graduated from medical school in 2016, 10 years ago.
What insurance does Dr. Celia Difan Chao accept?
Dr. Chao is in network with 8 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Humana. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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