Quick answers
- Does Calvin D. Sun accept Medicare assignment?
- Yes. Medicare's clinician data says Calvin D. Sun 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 Calvin D. Sun see?
- In 2024, CMS data shows 268 Original Medicare patients and 503 services for Calvin D. Sun. This counts Original Medicare only and measures volume, not quality.
- What is Calvin D. Sun's NPI number?
- 1548688625. 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 Calvin D. Sun, 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 | 268 |
|---|---|
| Services billed to Medicare | 503 |
| Different services or procedures | 43 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)165 services
- Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)62 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)44 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)32 services
- X-ray of chest, 2 views (71046)24 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 cholesterol71%
- Arthritis54%
- High blood pressure52%
- Anxiety31%
- Osteoporosis27%
- Ischemic heart disease25%
Practice locations
Addresses where Calvin D. Sun is enrolled with Medicare (CMS data updated October 2, 2026).
- 2248 31st StAstoria, NY 11105 (718) 571‑9192
- 2398 BroadwayNew York, NY 10024 (212) 721‑2111
Group practices
Medicare enrollment lists Calvin D. Sun as a member of this group (CMS data updated October 2, 2026).
- City Medical of Upper East Side PLLC658 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Astoria
Clinicians with the same Medicare primary specialty in Astoria, NY — not a recommendation.
Other clinicians in City Medical of Upper East Side PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548688625 |
| 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