Constance Chenfang Twu, OD
- Part D claims, 2024
- 73
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-3910
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fontana Medical Center
Fontana, California
Find Constance Twu'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.
Constance Chenfang Twu is an optometrist in Fontana, California
Constance Twu practices at Fontana Medical Center in Fontana, California.
Constance Twu's NPI, 1619028669, was assigned on January 16, 2007. Constance Twu graduated from Southern California College of Optometry in 2002. Constance Twu holds California license 11970.
- NPI
- 1619028669NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587849765
- NPI enumeration date
- January 16, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-3910
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Constance Chenfang Twu practices at Fontana Medical Center in Fontana, California
Constance Twu's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-3910.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-3910
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Constance Chenfang Twu is affiliated with 2 sites of care and 1 medical group
Constance Twu's primary practice is Fontana Medical Center in Fontana, California. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Constance Twu to 1 more group practice or clinic, 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 Constance Chenfang Twu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Constance Twu practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Constance Chenfang Twu is one of 7,206 optometrists in California
Optometrist is Constance Twu's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Constance Twu is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Constance Twu
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
Constance Chenfang Twu's patients have a median age of 42
Across all payers, Dmand AI patient panel data puts Constance Twu's median patient age at 42, with 64% women.
Constance Twu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 42
Patient panel by sex, all payers
- Women64%
- Men36%
Source: Dmand AI Patient Panel Data
Constance Chenfang Twu wrote 73 Medicare Part D claims in 2024
In 2024, Constance Twu wrote 73 Medicare Part D claims for 21 patients. 42% of them were for generic drugs.
Constance Twu's Part D claims by kind of drug, 2024
- Generic31 claims42%
- Brand-name42 claims58%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Constance Chenfang Twu takes part in Medicare
Constance Twu 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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Constance Chenfang Twu graduated from Southern California College of Optometry
Constance Twu graduated from Southern California College of Optometry in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Constance Chenfang Twu'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) |
| 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 Constance Chenfang Twu
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Constance Chenfang Twu's NPI number?
Constance Chenfang Twu's NPI number is 1619028669. It was assigned on January 16, 2007, and it is active in the NPI Registry.
What does Constance Chenfang Twu specialize in?
Constance Chenfang Twu is an optometrist in Fontana, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Constance Chenfang Twu practice?
Constance Twu practices at 9961 Sierra Ave, Fontana, CA 92335. Constance Twu's primary practice is Fontana Medical Center in Fontana, California. Dmand AI also links Constance Twu to 1 group practice or clinic.
What is Constance Chenfang Twu's office phone number?
The practice phone on file for Constance Twu is (909) 427-3910.
What is Constance Chenfang Twu's medical license number?
Constance Twu holds California license 11970.
What medical group is Constance Chenfang Twu part of?
Constance Twu is linked to Southern California Permanente Medical Group.
Does Constance Chenfang Twu accept Medicare?
Yes. CMS lists Constance Twu as accepting Medicare assignment.
Where did Constance Chenfang Twu go to medical school?
Constance Twu graduated from Southern California College of Optometry in 2002.
How long has Constance Chenfang Twu been practicing?
Constance Twu graduated from medical school in 2002, 24 years ago.
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