Lina Chan, OD
- Medicare patients, 2024
- 157
- Part D claims, 2024
- 22
- Industry payments
- $435
- Affiliated sites
- 3
- Medical group
- 1
- Practice address
- 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-4600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Walnut Creek Endoscopy Center
Surgery Center - Medicare-Certified · Walnut Creek, California
Find Lina Chan'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.
Lina Chan is an optometrist in Walnut Creek, California
Lina Chan practices at Walnut Creek Endoscopy Center in Walnut Creek, California.
Lina Chan's NPI, 1659358042, was assigned on December 27, 2005. Lina Chan graduated from University of California - School of Optometry in 1999. Lina Chan holds California license OPT11108.
- NPI
- 1659358042NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183626484
- NPI enumeration date
- December 27, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 939-4600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Lina Chan practices at Walnut Creek Endoscopy Center in Walnut Creek, California
Lina Chan's primary practice is Walnut Creek Endoscopy Center, at 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598. The practice phone is (925) 939-4600.
- Walnut Creek Endoscopy Center365 Lennon Lane, Suite 100, Walnut Creek, CA 94598Phone(925) 939-4600
Source: Dmand AI Affiliation Data
Lina Chan is affiliated with 3 sites of care and 1 medical group
Lina Chan's primary practice is Walnut Creek Endoscopy Center in Walnut Creek, California. Dmand AI also links Lina Chan to 1 dialysis center, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Lina Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Lina Chan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Walnut Creek Endoscopy Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Lina Chan is one of 7,206 optometrists in California
Optometrist is Lina Chan's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Lina Chan is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Lina Chan
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
Lina Chan treated 157 Medicare patients in 2024, average age 77
CMS counts 157 Medicare patients who saw Lina Chan in 2024. The largest group is 65 to 74, with 64 patients. 75% of them have high cholesterol, and 68% have high blood pressure. Their average risk score is 0.95, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Lina Chan's median patient age at 81, with 60% women.
Lina Chan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Lina Chan's Medicare patients by sex, 2024
- Women9259%
- Men6541%
Chronic conditions among Lina Chan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure68%
- Arthritis46%
- Osteoporosis29%
- Ischemic heart disease24%
- Anxiety22%
- Cancer22%
- Mood disorders20%
Share of Medicare patients with each condition. A patient can have several.
Lina Chan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 81
Patient panel by sex, all payers
- Women60%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Lina Chan wrote 22 Medicare Part D claims in 2024
In 2024, Lina Chan wrote 22 Medicare Part D claims for 19 patients.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Lina Chan takes part in Medicare
Lina Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Lina Chan received $435 in industry payments in 2025
CMS Open Payments shows 10 general payments to Lina Chan from 8 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Glaukos Corporation paid the most, $151.
Companies that paid Lina Chan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Lina Chan graduated from University of California - School of Optometry
Lina Chan graduated from University of California - School of Optometry in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Lina Chan'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 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) |
| 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 Lina Chan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Lina Chan's NPI number?
Lina Chan's NPI number is 1659358042. It was assigned on December 27, 2005, and it is active in the NPI Registry.
What does Lina Chan specialize in?
Lina Chan is an optometrist in Walnut Creek, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Lina Chan practice?
Lina Chan practices at 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598. Lina Chan's primary practice is Walnut Creek Endoscopy Center in Walnut Creek, California. Dmand AI also links Lina Chan to 1 dialysis center, 1 group practice or clinic and 1 medical group.
What is Lina Chan's office phone number?
The practice phone on file for Lina Chan is (925) 939-4600.
What is Lina Chan's medical license number?
Lina Chan holds California license OPT11108.
Does Lina Chan accept Medicare?
Yes. CMS lists Lina Chan as accepting Medicare assignment.
How many Medicare patients does Lina Chan see?
CMS counts 157 Medicare patients who saw Lina Chan in 2024, with an average age of 77.
Where did Lina Chan go to medical school?
Lina Chan graduated from University of California - School of Optometry in 1999.
Has Lina Chan received payments from drug or device companies?
CMS Open Payments shows $435 in general payments to Lina Chan from 8 companies from 2025 to 2025. The largest total came from Glaukos Corporation.
How long has Lina Chan been practicing?
Lina Chan graduated from medical school in 1999, 27 years ago.
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