Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Stephan Alexander Castellanos, MD, MBA

Individual provider Hospitalist Physician · NPI 1750900684

Dr. Stephan Alexander Castellanos, MD, MBA is a Hospitalist in New York, New York. Qualified in 2020, 6 years ago. Practices with New York University, a 5,884-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
6
Licensed in
NY
In the registry since
2020
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MBA — Master of Business Administration
A graduate business degree.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

550 1st Ave
New York, NY 10016-6402
Phone: (212) 263-7300
Fax: (212) 263-6022
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 (1)

  • 3014 Holly Hall St, Houston, TX 77054-4161 — (205) 907-9510

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 323604 (NY)

Record details

NPI number1750900684
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MBA
Sole proprietorYes
NPI enumeratedApril 10, 2020
Last updated in NPPESSeptember 19, 2023
Certification dateSeptember 19, 2023

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice New York University — 5884 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients32
Services billed 32 a service is one billed item, such as a visit, a test or a procedure
Average patient age80

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 New York University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 5884 clinicians in the practice; 12 are shown here.

Other providers in New York