Quick answers
- Which hospitals does James J. Yoon work at?
- Medicare's official clinician data lists James J. Yoon at 1 hospital: Beth Israel Deaconess Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James J. Yoon see patients?
- Medicare's clinician data lists 1 practice location in New York, NY. Call before your visit to confirm the address.
- What is James J. Yoon's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Internal Medicine.
- Does James J. Yoon accept Medicare assignment?
- Yes. Medicare's clinician data says James J. Yoon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for James J. Yoon?
- (212) 639-2000, as listed in official Medicare / NPI Registry data.
- What is James J. Yoon's NPI number?
- 1669903548. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James J. Yoon works
Medicare's Facility Affiliation Data lists James J. Yoon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Beth Israel Deaconess Medical CenterBoston, MA · Acute Care Hospital · CCN 220086
Practice locations
Addresses where James J. Yoon is enrolled with Medicare (CMS data updated 2026-10-02).
- 1275 York AveNew York, NY 10065 (212) 639‑2000
Group practices
Medicare enrollment lists James J. Yoon as a member of this group (CMS data updated 2026-10-02).
- Memorial Hematology Lymphoma Group216 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Icahn School Of Medicine At Mount Sinai |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669903548 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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