Quick answers
- Does Nai-Lun Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Nai-Lun 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 Nai-Lun Chang see?
- In 2024, CMS data shows 162 Original Medicare patients and 677 services for Nai-Lun Chang. This counts Original Medicare only and measures volume, not quality.
- What is Nai-Lun Chang's NPI number?
- 1639425689. 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 Nai-Lun 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 | 162 |
|---|---|
| Services billed to Medicare | 677 |
| Different services or procedures | 32 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)131 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)109 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)69 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)61 services
- Injection, regadenoson, 0.1 mg (J2785)44 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%
- Diabetes53%
- Chronic kidney disease51%
- Arthritis49%
- Heart failure33%
Hospitals where Nai-Lun Chang works
Medicare's Facility Affiliation Data lists Nai-Lun Chang at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Maimonides Medical CenterBrooklyn, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330194
Practice locations
Addresses where Nai-Lun Chang is enrolled with Medicare (CMS data updated October 2, 2026).
- 1865 86th StBrooklyn, NY 11214 (718) 975‑5462
- 1867 86th St, Fl 1Brooklyn, NY 11214 (718) 872‑7777
- 4235 Main StFlushing, NY 11355
- 762 59th StBrooklyn, NY 11220 (718) 393‑5333
- 8686 Bay Pkwy, Suite M1Brooklyn, NY 11214 (718) 372‑0888
Group practices
Medicare enrollment lists Nai-Lun Chang as a member of this group (CMS data updated October 2, 2026).
- Chinatown True Care Medical PLLC241 clinicians in the group
Specialties
Other interventional cardiologists in Brooklyn
Clinicians with the same Medicare primary specialty in Brooklyn, NY — not a recommendation.
Other clinicians in Chinatown True Care Medical PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639425689 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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