Clarissa Sin, OD
- Medicare patients, 2024
- 52
- Industry payments
- $23
- Affiliated sites
- 2
- Medical group
- 1
- State license
- 1
- Practice address
- 39355 California St Suite 103 Suite 103, Fremont, CA 94538-1447
- Practice phone
- Call (510) 744-2010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fremont Optometric Group
Eye care practice · Fremont, California
Find Clarissa Sin'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.
Clarissa Sin is an optometrist in Fremont, California
Clarissa Sin practices at Fremont Optometric Group in Fremont, California.
Clarissa Sin's NPI, 1619106903, was assigned on July 7, 2009. Clarissa Sin graduated from State University of New York - State College Optometry in 2009. Clarissa Sin holds California license 13768.
- NPI
- 1619106903NPI Registry (opens in a new tab)
- NPI enumeration date
- July 7, 2009
- NPI status
- Active
- Practice phone
- (510) 744-2010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Clarissa Sin practices at 2 locations in Fremont, California
Clarissa Sin's primary practice is Fremont Optometric Group, at 39355 California St Suite 103 Suite 103, Fremont, CA 94538-1447. The practice phone is (510) 744-2010. The NPI Registry lists Clarissa Sin's practice address as 39350 Civic Center Dr, Fremont, CA 94538.
- Fremont Optometric GroupPrimary39355 California St Suite 103 Suite 103, Fremont, CA 94538-1447Phone(510) 744-2010
- NPI Registry address39350 Civic Center Dr, Fremont, CA 94538 · Alameda County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Clarissa Sin is affiliated with 2 sites of care and 1 medical group
Clarissa Sin's primary practice is Fremont Optometric Group in Fremont, California. Dmand AI also links Clarissa Sin to 1 physician office and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Clarissa Sin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Clarissa Sin practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fremont Optometric Group | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Clarissa Sin is one of 7,206 optometrists in California
Optometrist is Clarissa Sin's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Clarissa Sin is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Clarissa Sin
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
Clarissa Sin treated 52 Medicare patients in 2024, average age 74
CMS counts 52 Medicare patients who saw Clarissa Sin in 2024. The largest group is 65 to 74, with 31 patients. 65% of them have high cholesterol, and 54% have high blood pressure. Their average risk score is 0.76, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Clarissa Sin's median patient age at 58, with 67% women.
Clarissa Sin's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Clarissa Sin's Medicare patients by sex, 2024
- Women3160%
- Men2140%
Chronic conditions among Clarissa Sin's Medicare patients, 2024
- High cholesterol65%
- High blood pressure54%
- Arthritis33%
Share of Medicare patients with each condition. A patient can have several.
Clarissa Sin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women67%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Clarissa Sin received $23 in industry payments in 2025
CMS Open Payments shows 1 general payment to Clarissa Sin from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $23.
Companies that paid Clarissa Sin the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Clarissa Sin graduated from State University of New York - State College Optometry
Clarissa Sin graduated from State University of New York - State College Optometry in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Clarissa Sin'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (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 Clarissa Sin
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Clarissa Sin's NPI number?
Clarissa Sin's NPI number is 1619106903. It was assigned on July 7, 2009, and it is active in the NPI Registry.
What does Clarissa Sin specialize in?
Clarissa Sin is an optometrist in Fremont, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Clarissa Sin practice?
Clarissa Sin practices at 39355 California St Suite 103 Suite 103, Fremont, CA 94538-1447. Clarissa Sin also practices at 39350 Civic Center Dr, Fremont, CA 94538. Clarissa Sin's primary practice is Fremont Optometric Group in Fremont, California. Dmand AI also links Clarissa Sin to 1 physician office and 1 medical group.
What is Clarissa Sin's office phone number?
The practice phone on file for Clarissa Sin is (510) 744-2010.
What is Clarissa Sin's medical license number?
Clarissa Sin holds California license 13768.
How many Medicare patients does Clarissa Sin see?
CMS counts 52 Medicare patients who saw Clarissa Sin in 2024, with an average age of 74.
Where did Clarissa Sin go to medical school?
Clarissa Sin graduated from State University of New York - State College Optometry in 2009.
Has Clarissa Sin received payments from drug or device companies?
CMS Open Payments shows $23 in general payments to Clarissa Sin from 1 company from 2025 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Clarissa Sin been practicing?
Clarissa Sin graduated from medical school in 2009, 17 years ago.
Selling to optometrist practices?
See optometrists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card