Quick answers
- Does Chin Yung Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Chin Yung Chang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Chin Yung Chang see?
- In 2024, CMS data shows 860 Original Medicare patients and 2,808 services for Chin Yung Chang. This counts Original Medicare only and measures volume, not quality.
- What is Chin Yung Chang's NPI number?
- 1235295023. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Chin Yung Chang, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 860 |
|---|---|
| Services billed to Medicare | 2,808 |
| Different services or procedures | 33 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)1,007 services
- Special stained specimen slides to examine tissue, each additional procedure (88341)542 services
- Special stained specimen slides to examine tissue, initial procedure (88342)223 services
- Pathology examination of tissue using a microscope, moderately high complexity (88307)130 services
- Preparation of tissue for examination by removing any calcium present (88311)112 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis60%
- Diabetes34%
- Chronic kidney disease31%
- Ischemic heart disease28%
Practice locations
Addresses where Chin Yung Chang is enrolled with Medicare (CMS data updated October 2, 2026).
- 11808 Seven Locks RdPotomac, MD 20854
- 1276 Fulton Ave, Rm 219Bronx, NY 10456
Specialties
- Pathologyprimary
Other pathologists in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1981 (45 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235295023 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians