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

Stephen Jay Seiner, MD

Individual provider Psychiatry Physician · NPI 1245298835

Stephen Jay Seiner, MD practises Psychiatry in Belmont, Massachusetts. Graduated from Washington University School of Medicine in 1994, 32 years ago. Practices with The McLean Hospital Corporation, a 186-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
32
Trained at
Washington University School of Medicine
Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

115 Mill St McLean Hospital
Belmont, MA 02478-1041
Phone: (617) 855-2204
Show map & directions

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

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 150292 (MA)

Record details

NPI number1245298835
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 3, 2006
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1994 (32 years in practice)
Group practice The McLean Hospital Corporation — 186 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 patients31
Services billed 296 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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 The McLean Hospital Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 186 clinicians in the practice; 12 are shown here.

Other providers in Belmont