Gary A. Chang, PMHNP
- Part D claims, 2024
- 1,238
- Hospital affiliations
- 1
- Industry payments
- $3,412
- Medical groups
- 4
- State license
- 1
- Practice address
- 1543 -1545 Inwood Ave, Bronx, NY 10452
- Practice phone
- Call (914) 734-8858
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sun River Health Inwood
FQHC - Main Site · Bronx, New York
Find Gary 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.
Gary A. Chang is a psychiatrist in Bronx, New York
Gary Chang practices at Sun River Health Inwood in Bronx, New York.
Gary Chang's NPI, 1033892286, was assigned on August 14, 2023. Gary Chang holds New York license 404449.
- NPI
- 1033892286NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597118075
- NPI enumeration date
- August 14, 2023
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (914) 734-8858
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 30
- Medical school graduation
- 2022
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gary A. Chang practices at 2 locations in Bronx, New York
Gary Chang's primary practice is Sun River Health Inwood, at 1543 -1545 Inwood Ave, Bronx, NY 10452 in Bronx County. The practice phone is (914) 734-8858. Gary Chang also practices at Sun River Health Inc., 1545 Inwood Ave, Bronx, NY 10452.
- Sun River Health InwoodPrimary1543 -1545 Inwood Ave, Bronx, NY 10452 · Bronx CountyPhone(914) 734-8858
- Sun River Health Inc.1545 Inwood Ave, Bronx, NY 10452 · Bronx CountyPhone(914) 734-8800
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Gary A. Chang is affiliated with 4 sites of care and 4 medical groups
Gary Chang's primary practice is Sun River Health Inwood in Bronx, New York. Gary Chang is also affiliated with Saint Joseph's Medical Center. The medical group on file is Sun River Health Amenia. Dmand AI also links Gary Chang to 3 more medical groups and 2 group practices and clinics, each named with a free account. Gary 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 Gary A. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gary Chang practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sun River Health Inwood | Available with a free account |
| +3 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Gary A. Chang is one of 4,448 psychiatrists in New York
Psychiatry is Gary Chang's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Gary Chang is licensed in New York.
Specialties and state licenses
- Psychiatry, New YorkPrimary
Psychiatrists near Gary Chang
Counts of psychiatrists 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
Gary A. Chang's patients have a median age of 41
Across all payers, Dmand AI patient panel data puts Gary Chang's median patient age at 41, with 56% women.
Gary 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 41
Patient panel by sex, all payers
- Women56%
- Men42%
Source: Dmand AI Patient Panel Data
Gary A. Chang wrote 1,238 Medicare Part D claims in 2024
In 2024, Gary Chang wrote 1,238 Medicare Part D claims for 145 patients. 92% of them were for generic drugs. CMS names the drug for 1,083 of them, across 32 drugs with 11 or more claims each, at $108,348 in total drug cost. In 2023, CMS named 14 claims across 1 drug.
Gary Chang's Part D claims by kind of drug, 2024
- Generic1,142 claims92%
- Brand-name96 claims8%
Gary Chang's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Gary Chang's Part D claims, 2024
- Antipsychotics, patients 65 and over8%93 of 1,238 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 142024: 1,0837636%
Drugs named by CMS: 32 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Gary A. Chang takes part in Medicare
Gary 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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Gary A. Chang received $3,412 in industry payments from 2023 to 2025
CMS Open Payments shows 166 general payments to Gary Chang from 10 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $952.
General payments to Gary Chang by program year, 2023 to 2025
Companies that paid Gary Chang the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Gary A. 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 Affiliation DataDmand AI Practice 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 and Drug (CMS) (opens in a new tab)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 Gary A. 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 Gary A. Chang's NPI number?
Gary A. Chang's NPI number is 1033892286. It was assigned on August 14, 2023, and it is active in the NPI Registry.
What does Gary A. Chang specialize in?
Gary A. Chang is a psychiatrist in Bronx, New York. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Gary A. Chang practice?
Gary Chang practices at 1543 -1545 Inwood Ave, Bronx, NY 10452. Gary Chang also practices at 1545 Inwood Ave, Bronx, NY 10452. Gary Chang's primary practice is Sun River Health Inwood in Bronx, New York. Dmand AI also links Gary Chang to 3 medical groups and 2 group practices and clinics.
What is Gary A. Chang's office phone number?
The practice phone on file for Gary Chang is (914) 734-8858.
What is Gary A. Chang's medical license number?
Gary Chang holds New York license 404449.
Which hospitals is Gary A. Chang affiliated with?
Gary Chang is affiliated with Saint Joseph's Medical Center.
What medical group is Gary A. Chang part of?
Gary Chang is linked to Sun River Health Amenia. Dmand AI links Gary Chang to 3 more medical groups.
Does Gary A. Chang accept Medicare?
Yes. CMS lists Gary Chang as accepting Medicare assignment.
What drugs does Gary A. Chang prescribe most?
In 2024 Medicare Part D data, Gary Chang's most prescribed drugs by claims were Quetiapine Fumarate, Sertraline HCl and Trazodone HCl.
Has Gary A. Chang received payments from drug or device companies?
CMS Open Payments shows $3,412 in general payments to Gary Chang from 10 companies from 2023 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Gary A. Chang been practicing?
Gary Chang graduated from medical school in 2022, 4 years ago.
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