Dr. Thomas Tm Chang, MD
- Medicare services, 2017
- 518
- Part D claims, 2018
- 16
- Industry payments
- $197
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 70 E 10th St Suite 1f Suite 1f, New York, NY 10003
- Practice phone
- Call (212) 673-5650
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sharpsite Ophthalmology
Physician office · New York, New York
Find Dr. 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.
Dr. Thomas Tm Chang is an ophthalmologist in New York, New York
Dr. Chang practices at Sharpsite Ophthalmology in New York, New York.
Dr. Chang's NPI, 1699756080, was assigned on November 11, 2005. Dr. Chang holds New York license 144469.
- NPI
- 1699756080NPI Registry (opens in a new tab)
- NPI enumeration date
- November 11, 2005
- NPI status
- Active
- Practice phone
- (212) 673-5650
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Thomas Tm Chang practices at Sharpsite Ophthalmology in New York, New York
Dr. Chang's primary practice is Sharpsite Ophthalmology, at 70 E 10th St Suite 1f Suite 1f, New York, NY 10003. The practice phone is (212) 673-5650.
- Sharpsite Ophthalmology70 E 10th St Suite 1f Suite 1f, New York, NY 10003Phone(212) 673-5650
Source: Dmand AI Affiliation Data
Dr. Thomas Tm Chang is affiliated with 1 site of care
Dr. Chang's primary practice is Sharpsite Ophthalmology in New York, New York.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas Tm Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sharpsite Ophthalmology | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Tm Chang is one of 1,467 ophthalmologists in New York
Ophthalmology is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Chang is licensed in New York.
Specialties and state licenses
- Ophthalmology, New YorkPrimary
Ophthalmologists near Dr. Chang
Counts of ophthalmologists 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
Dr. Thomas Tm Chang billed Medicare for 518 services in 2017
CMS data shows 518 Medicare services from Dr. Chang across 6 procedure codes in 2017. Medicare paid $29,597 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Tests and treatments
- 2016: 1,0162017: 51849%
- Imaging
- 2016: 462017: 0100%
- Surgery
- 2016: 632017: 0100%
Dr. Chang compared with the New York median for ophthalmologists, 2017
- Dr. Chang
- New York median
- Medicare services
- 518vs 1,25859% below
- Part D claims
- 16vs 64798% below
Medians across 1,557 ophthalmologists in New York with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2017
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other ophthalmologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Tm Chang's patients have a median age of 76
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 76, with 64% women.
Dr. 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 76
Patient panel by sex, all payers
- Women64%
- Men27%
Source: Dmand AI Patient Panel Data
Dr. Thomas Tm Chang wrote 16 Medicare Part D claims in 2018
In 2018, Dr. Chang wrote 16 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $245 in total drug cost. In 2017, CMS named 284 claims across 8 drugs.
Dr. Chang's most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 2842018: 1694%
Drugs named by CMS: 1 in 2018, 8 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Thomas Tm Chang received $197 in industry payments in 2016
CMS Open Payments shows 7 general payments to Dr. Chang from 5 drug and device companies in 2016. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $91.
Companies that paid Dr. Chang the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Thomas Tm 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 Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| 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 Dr. Thomas Tm 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 Dr. Thomas Tm Chang's NPI number?
Dr. Thomas Tm Chang's NPI number is 1699756080. It was assigned on November 11, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Tm Chang?
Dr. Thomas Tm Chang is an ophthalmologist in New York, New York. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Thomas Tm Chang practice?
Dr. Chang practices at 70 E 10th St Suite 1f Suite 1f, New York, NY 10003. Dr. Chang's primary practice is Sharpsite Ophthalmology in New York, New York.
What is Dr. Thomas Tm Chang's office phone number?
The practice phone on file for Dr. Chang is (212) 673-5650.
What is Dr. Thomas Tm Chang's medical license number?
Dr. Chang holds New York license 144469.
Does Dr. Thomas Tm Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 518 services in 2017.
What services does Dr. Thomas Tm Chang bill to Medicare?
In 2017, Dr. Chang's most billed Medicare services were eye exam or test (92020), eye exam or test (92083) and eye exam or test (92250).
What drugs does Dr. Thomas Tm Chang prescribe most?
In 2018 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Latanoprost.
Has Dr. Thomas Tm Chang received payments from drug or device companies?
CMS Open Payments shows $197 in general payments to Dr. Chang from 5 companies from 2016 to 2016. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Thomas Tm Chang been practicing?
Dr. Chang's NPI was assigned in 2005.
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