Chih-Chiun Chang, MD
NPI 1093392391 · Student in an Organized Health Care Education/Training Program · New York, NY
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chih-Chiun Chang, MD is a Student in an Organized Health Care Education/Training Program provider in New York, NY (NPI 1093392391).
Provider details
- NPI number
- 1093392391
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 364 | 142 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 236 | 99 |
| Brimonidine Tartrate | 205 | 75 |
| Prednisolone Acetate | 161 | 79 |
| Netarsudil Mesylatebrand: Rhopressa | 86 | 28 |
| Ketorolac Tromethamine | 70 | 31 |
| Moxifloxacin Hclbrand: Moxifloxacin | 66 | 37 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-03-24
- Last updated
- 2023-09-07
- Certified
- 2023-09-07
Frequently asked questions
- What is Chih-Chiun Chang's NPI number?
- Chih-Chiun Chang's National Provider Identifier (NPI) is 1093392391, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chih-Chiun Chang's specialty?
- Chih-Chiun Chang is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Chih-Chiun Chang located?
- Chih-Chiun Chang's practice location on file with NPPES is 310 E 14th St, New York, NY 10003-4284.
- What is Chih-Chiun Chang's phone number?
- The practice phone number listed in the NPPES registry for Chih-Chiun Chang is (212) 979-4000.
- Does Chih-Chiun Chang accept Medicare?
- Chih-Chiun Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chih-Chiun Chang's NPI active?
- Yes — Chih-Chiun Chang's NPI (1093392391) is active in the NPPES registry as of the last update on 2023-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.