Joanne D. Du, OD
- Part D claims, 2024
- 22
- Industry payments
- $102
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 10300 S De Anza Blvd, Cupertino, CA 95014
- Practice phone
- Call (408) 253-3083
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Spectrum Eye Physicians, a Medical Corporation
Cupertino, California
Find Joanne Du'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.
Joanne D. Du is an optometrist in Cupertino, California
Joanne Du practices at Spectrum Eye Physicians, a Medical Corporation in Cupertino, California.
Joanne Du's NPI, 1649852120, was assigned on April 24, 2021. Joanne Du holds California license 34922.
- NPI
- 1649852120NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103286133
- NPI enumeration date
- April 24, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 253-3083
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Joanne D. Du practices at Spectrum Eye Physicians, a Medical Corporation in Cupertino, California
Joanne Du's primary practice is Spectrum Eye Physicians, a Medical Corporation, at 10300 S De Anza Blvd, Cupertino, CA 95014 in Santa Clara County. The practice phone is (408) 253-3083.
- Spectrum Eye Physicians, a Medical Corporation10300 S De Anza Blvd, Cupertino, CA 95014 · Santa Clara CountyPhone(408) 253-3083
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Joanne D. Du is affiliated with 2 sites of care and 1 medical group
Joanne Du's primary practice is Spectrum Eye Physicians, a Medical Corporation in Cupertino, California. Dmand AI also links Joanne Du to 1 group practice or clinic and 1 medical group, 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 Joanne D. Du's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Joanne Du practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Spectrum Eye Physicians, a Medical Corporation | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Joanne D. Du is one of 7,206 optometrists in California
Optometrist is Joanne Du's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Joanne Du is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Joanne Du
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
Joanne D. Du's patients have a median age of 54
Across all payers, Dmand AI patient panel data puts Joanne Du's median patient age at 54, with 55% women.
Joanne Du's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women55%
- Men42%
Source: Dmand AI Patient Panel Data
Joanne D. Du wrote 22 Medicare Part D claims in 2024
In 2024, Joanne Du wrote 22 Medicare Part D claims for 11 patients.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Joanne D. Du takes part in Medicare
Joanne Du 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Joanne D. Du received $102 in industry payments in 2025
CMS Open Payments shows 3 general payments to Joanne Du from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Johnson & Johnson Vision Care, Inc. paid the most, $76.
Companies that paid Joanne Du the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Joanne D. Du'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 Data |
| 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) |
| 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 Joanne D. Du
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Joanne D. Du's NPI number?
Joanne D. Du's NPI number is 1649852120. It was assigned on April 24, 2021, and it is active in the NPI Registry.
What does Joanne D. Du specialize in?
Joanne D. Du is an optometrist in Cupertino, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Joanne D. Du practice?
Joanne Du practices at 10300 S De Anza Blvd, Cupertino, CA 95014. Joanne Du's primary practice is Spectrum Eye Physicians, a Medical Corporation in Cupertino, California. Dmand AI also links Joanne Du to 1 group practice or clinic and 1 medical group.
What is Joanne D. Du's office phone number?
The practice phone on file for Joanne Du is (408) 253-3083.
What is Joanne D. Du's medical license number?
Joanne Du holds California license 34922.
Does Joanne D. Du accept Medicare?
Yes. CMS lists Joanne Du as accepting Medicare assignment.
Has Joanne D. Du received payments from drug or device companies?
CMS Open Payments shows $102 in general payments to Joanne Du from 2 companies from 2025 to 2025. The largest total came from Johnson & Johnson Vision Care, Inc.
How long has Joanne D. Du been practicing?
Joanne Du's NPI was assigned in 2021.
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