Vanessa Loo Chang, OD
- Part D claims, 2024
- 20
- Industry payments
- $257
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 1910 S 1st St, Mcallen, TX 78503
- Practice phone
- Call (956) 423-2100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ophthalmic Consultants of Texas P.A.
Mcallen, Texas
Find Vanessa Chang's professional email, personal email and mobile number
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Vanessa Loo Chang is an optometrist in Mcallen, Texas
Vanessa Chang practices at Ophthalmic Consultants of Texas P.A. in Mcallen, Texas.
Vanessa Chang's NPI, 1386869451, was assigned on April 16, 2007. Vanessa Chang graduated from University of Houston - College of Optometry in 1980. Vanessa Chang holds Texas license 2733T.
- NPI
- 1386869451NPI Registry (opens in a new tab)
- NPI enumeration date
- April 16, 2007
- NPI status
- Active
- Practice phone
- (956) 423-2100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Vanessa Loo Chang practices at Ophthalmic Consultants of Texas P.A. in Mcallen, Texas
Vanessa Chang's primary practice is Ophthalmic Consultants of Texas P.A., at 1910 S 1st St, Mcallen, TX 78503 in Hidalgo County. The practice phone is (956) 423-2100.
- Ophthalmic Consultants of Texas P.A.1910 S 1st St, Mcallen, TX 78503 · Hidalgo CountyPhone(956) 423-2100
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Vanessa Loo Chang is affiliated with 2 sites of care
Vanessa Chang's primary practice is Ophthalmic Consultants of Texas P.A. in Mcallen, Texas. Dmand AI also links Vanessa Chang to 1 physician office, 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 Vanessa Loo Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Vanessa Chang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ophthalmic Consultants of Texas P.A. | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Vanessa Loo Chang is one of 3,272 optometrists in Texas
Optometrist is Vanessa Chang's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Vanessa Chang is licensed in Texas.
Specialties and state licenses
- Optometrist, TexasPrimary
Optometrists near Vanessa Chang
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
Vanessa Loo Chang's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Vanessa Chang's median patient age at 67, with 60% women.
Vanessa Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women60%
- Men38%
Source: Dmand AI Patient Panel Data
Vanessa Loo Chang wrote 20 Medicare Part D claims in 2024
In 2024, Vanessa Chang wrote 20 Medicare Part D claims for 13 patients. 80% of them were for generic drugs.
Vanessa Chang's Part D claims by kind of drug, 2024
- Generic16 claims80%
- Brand-name and other4 claims20%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Vanessa Loo Chang received $257 in industry payments in 2025
CMS Open Payments shows 2 general payments to Vanessa Chang 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, $257.
Companies that paid Vanessa Chang the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Vanessa Loo Chang graduated from University of Houston - College of Optometry
Vanessa Chang graduated from University of Houston - College of Optometry in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Vanessa Loo Chang'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) |
| 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 Vanessa Loo Chang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Vanessa Loo Chang's NPI number?
Vanessa Loo Chang's NPI number is 1386869451. It was assigned on April 16, 2007, and it is active in the NPI Registry.
What does Vanessa Loo Chang specialize in?
Vanessa Loo Chang is an optometrist in Mcallen, Texas. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Vanessa Loo Chang practice?
Vanessa Chang practices at 1910 S 1st St, Mcallen, TX 78503. Vanessa Chang's primary practice is Ophthalmic Consultants of Texas P.A. in Mcallen, Texas. Dmand AI also links Vanessa Chang to 1 physician office.
What is Vanessa Loo Chang's office phone number?
The practice phone on file for Vanessa Chang is (956) 423-2100.
What is Vanessa Loo Chang's medical license number?
Vanessa Chang holds Texas license 2733T.
Where did Vanessa Loo Chang go to medical school?
Vanessa Chang graduated from University of Houston - College of Optometry in 1980.
Has Vanessa Loo Chang received payments from drug or device companies?
CMS Open Payments shows $257 in general payments to Vanessa Chang from 1 company from 2025 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Vanessa Loo Chang been practicing?
Vanessa Chang graduated from medical school in 1980, 46 years ago.
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