Lillian J. Tsai, OD
- Medicare patients, 2024
- 91
- Part D claims, 2024
- 44
- Industry payments
- $2,052
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 729 Mission St, South Pasadena, CA 91030
- Practice phone
- Call (626) 441-5300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
South Pasadena Optometric Group, Inc.
South Pasadena, California
Find Lillian Tsai'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.
Lillian J. Tsai is an optometrist in South Pasadena, California
Lillian Tsai practices at South Pasadena Optometric Group, Inc. in South Pasadena, California.
Lillian Tsai's NPI, 1841831062, was assigned on September 30, 2019. Lillian Tsai graduated from Illinois College of Optometry at Chicago in 2019. Lillian Tsai holds California license 34412TLG.
- NPI
- 1841831062NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2062844616
- NPI enumeration date
- September 30, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (626) 441-5300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Lillian J. Tsai practices at South Pasadena Optometric Group, Inc. in South Pasadena, California
Lillian Tsai's primary practice is South Pasadena Optometric Group, Inc., at 729 Mission St, South Pasadena, CA 91030 in Los Angeles County. The practice phone is (626) 441-5300.
- South Pasadena Optometric Group, Inc.729 Mission St, South Pasadena, CA 91030 · Los Angeles CountyPhone(626) 441-5300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Lillian J. Tsai is affiliated with 3 sites of care and 2 medical groups
Lillian Tsai's primary practice is South Pasadena Optometric Group, Inc. in South Pasadena, California. Dmand AI also links Lillian Tsai to 2 group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Lillian J. Tsai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Lillian Tsai practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| South Pasadena Optometric Group, Inc. | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Lillian J. Tsai is one of 7,206 optometrists in California
Optometrist is Lillian Tsai's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Lillian Tsai is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Lillian Tsai
Counts of optometrists 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
Lillian J. Tsai treated 91 Medicare patients in 2024, average age 76
CMS counts 91 Medicare patients who saw Lillian Tsai in 2024. The largest group is 75 to 84, with 45 patients. 74% of them have high cholesterol, and 62% have high blood pressure. Their average risk score is 0.89, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Lillian Tsai's median patient age at 62, with 53% women.
Lillian Tsai's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Lillian Tsai's Medicare patients by sex, 2024
- Women5560%
- Men3640%
Chronic conditions among Lillian Tsai's Medicare patients, 2024
- High cholesterol74%
- High blood pressure62%
- Arthritis47%
- Ischemic heart disease31%
- Diabetes23%
- Cancer21%
- Osteoporosis18%
- Anxiety14%
Share of Medicare patients with each condition. A patient can have several.
Lillian Tsai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women53%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Lillian J. Tsai wrote 44 Medicare Part D claims in 2024
In 2024, Lillian Tsai wrote 44 Medicare Part D claims for 24 patients. 57% of them were for generic drugs.
Lillian Tsai's Part D claims by kind of drug, 2024
- Generic25 claims57%
- Brand-name19 claims43%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Lillian J. Tsai takes part in Medicare
Lillian Tsai accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Lillian J. Tsai received $2,052 in industry payments in 2025
CMS Open Payments shows 7 general payments to Lillian Tsai from 4 drug and device companies in 2025. Speaker and faculty fees make up the largest share, 88% of the total. Bausch & Lomb Americas Inc. paid the most, $1,817.
General payments to Lillian Tsai by kind, 2025 to 2025
- Speaker and faculty fees$1,80088%
- Food and beverage$25212%
Companies that paid Lillian Tsai the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Lillian J. Tsai graduated from Illinois College of Optometry at Chicago
Lillian Tsai graduated from Illinois College of Optometry at Chicago in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Lillian J. Tsai'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | 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 |
| 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 Lillian J. Tsai
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Lillian J. Tsai's NPI number?
Lillian J. Tsai's NPI number is 1841831062. It was assigned on September 30, 2019, and it is active in the NPI Registry.
What does Lillian J. Tsai specialize in?
Lillian J. Tsai is an optometrist in South Pasadena, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Lillian J. Tsai practice?
Lillian Tsai practices at 729 Mission St, South Pasadena, CA 91030. Lillian Tsai's primary practice is South Pasadena Optometric Group, Inc. in South Pasadena, California. Dmand AI also links Lillian Tsai to 2 group practices and clinics and 2 medical groups.
What is Lillian J. Tsai's office phone number?
The practice phone on file for Lillian Tsai is (626) 441-5300.
What is Lillian J. Tsai's medical license number?
Lillian Tsai holds California license 34412TLG.
Does Lillian J. Tsai accept Medicare?
Yes. CMS lists Lillian Tsai as accepting Medicare assignment.
How many Medicare patients does Lillian J. Tsai see?
CMS counts 91 Medicare patients who saw Lillian Tsai in 2024, with an average age of 76.
Where did Lillian J. Tsai go to medical school?
Lillian Tsai graduated from Illinois College of Optometry at Chicago in 2019.
Has Lillian J. Tsai received payments from drug or device companies?
CMS Open Payments shows $2,052 in general payments to Lillian Tsai from 4 companies from 2025 to 2025. The largest total came from Bausch & Lomb Americas Inc.
How long has Lillian J. Tsai been practicing?
Lillian Tsai graduated from medical school in 2019, 7 years ago.
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