Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Wei Jun Gu

Individual provider Hospitalist Physician · NPI 1659875946

Wei Jun Gu is a Hospitalist in New York, New York. Qualified in 2018, 8 years ago. Practices with Icahn School of Medicine at Mount Sinai, a 2,791-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
8
Licensed in
NY
In the registry since
2018
Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1111 Amsterdam Ave
New York, NY 10025-1716
Phone: (212) 523-2900
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • Maimonides Medical Center, Brooklyn, NY 11219 — (718) 283-3000
  • 27005 76th Ave, New Hyde Park, NY 11040-1402 — (516) 470-7000

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 306627 (NY)

Record details

NPI number1659875946
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedMarch 21, 2018
Last updated in NPPESApril 21, 2026
Certification dateApril 21, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Icahn School Of Medicine At Mount Sinai — 2791 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients215
Services billed 388 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Icahn School of Medicine at Mount Sinai

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2791 clinicians in the practice; 12 are shown here.

Other providers in New York