Stephen Chang, OD
- Part D claims, 2024
- 11
- Industry payments
- $127
- Affiliated sites
- 3
- Medical groups
- 2
- State license
- 1
- Practice address
- 1999 Mowry Avenue, Fremont, CA 94538
- Practice phone
- Call (510) 713-6690
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mowry II Clinic
FQHC - Main Site · Fremont, California
Find Stephen Chang'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.
Stephen Chang is an optometrist in Fremont, California
Stephen Chang practices at Mowry II Clinic in Fremont, California.
Stephen Chang's NPI, 1952664914, was assigned on June 24, 2012. Stephen Chang holds California license 14461.
- NPI
- 1952664914NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3375771934
- NPI enumeration date
- June 24, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 713-6690
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Stephen Chang practices at Mowry II Clinic in Fremont, California
Stephen Chang's primary practice is Mowry II Clinic, at 1999 Mowry Avenue, Fremont, CA 94538 in Alameda County. The practice phone is (510) 713-6690.
- Mowry II Clinic1999 Mowry Avenue, Fremont, CA 94538 · Alameda CountyPhone(510) 713-6690
Source: Dmand AI Affiliation Data
Stephen Chang is affiliated with 3 sites of care and 2 medical groups
Stephen Chang's primary practice is Mowry II Clinic in Fremont, California. The medical group on file is Bay Area Community Health. Dmand AI also links Stephen Chang to 1 more community health center, 1 group practice or clinic and 1 medical group, each named with a free account. Stephen Chang's employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Stephen Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Stephen Chang practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mowry II Clinic | 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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Stephen Chang is one of 7,206 optometrists in California
Optometrist is Stephen Chang's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Stephen Chang is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Stephen 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
Stephen Chang's patients have a median age of 58
Across all payers, Dmand AI patient panel data puts Stephen Chang's median patient age at 58, with 62% women.
Stephen 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 58
Patient panel by sex, all payers
- Women62%
- Men38%
Source: Dmand AI Patient Panel Data
Stephen Chang wrote 11 Medicare Part D claims in 2024
In 2024, Stephen Chang wrote 11 Medicare Part D claims.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Stephen Chang takes part in Medicare
Stephen Chang 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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Stephen Chang received $127 in industry payments in 2025
CMS Open Payments shows 1 general payment to Stephen Chang from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Dompe US, Inc. paid the most, $127.
Companies that paid Stephen 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
Sources for Stephen 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 | 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 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 Stephen 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 Stephen Chang's NPI number?
Stephen Chang's NPI number is 1952664914. It was assigned on June 24, 2012, and it is active in the NPI Registry.
What does Stephen Chang specialize in?
Stephen Chang is an optometrist in Fremont, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Stephen Chang practice?
Stephen Chang practices at 1999 Mowry Avenue, Fremont, CA 94538. Stephen Chang's primary practice is Mowry II Clinic in Fremont, California. Dmand AI also links Stephen Chang to 1 community health center, 1 group practice or clinic and 1 medical group.
What is Stephen Chang's office phone number?
The practice phone on file for Stephen Chang is (510) 713-6690.
What is Stephen Chang's medical license number?
Stephen Chang holds California license 14461.
What medical group is Stephen Chang part of?
Stephen Chang is linked to Bay Area Community Health. Dmand AI links Stephen Chang to 1 more medical group.
Does Stephen Chang accept Medicare?
Yes. CMS lists Stephen Chang as accepting Medicare assignment.
Has Stephen Chang received payments from drug or device companies?
CMS Open Payments shows $127 in general payments to Stephen Chang from 1 company from 2025 to 2025. The largest total came from Dompe US, Inc.
How long has Stephen Chang been practicing?
Stephen Chang graduated from medical school in 2012, 14 years ago.
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