STEPHEN C DORNER MD
NPI 1376992404
Emergency Medicine in Boston, MA
About Stephen C Dorner Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEPHEN C DORNER MD (NPI 1376992404) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (267091) and active in the NPI registry since June 2016. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Vanderbilt University School Of Medicine (2016).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Stephen C Dorner Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Stephen Dorner reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Oak Bluffs, MA 02557
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1194866210 (Massachusetts)
- 184 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAMartha's Vineyard Hospital Inc
Critical Access Hospitals · Oak Bluffs, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Stephen Dorner's NPI number?
The NPI number for Stephen Dorner is 1376992404. It was assigned to this individual provider in the NPPES registry on June 9, 2016.
Where is Stephen Dorner located?
Stephen Dorner practices at Massachusetts General Hospital 55 Fruit St., Boston, MA 02114. The listed phone number is (617) 724-4184.
What is Stephen Dorner's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Stephen Dorner enrolled in Medicare?
Yes. Stephen Dorner is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Stephen Dorner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Dorner reassigns Medicare benefits to 3 organizations: The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA) and Martha's Vineyard Hospital, Inc. (Oak Bluffs, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stephen Dorner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Dorner accept?
Health plans from Taro Health list Stephen Dorner as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Stephen Dorner affiliated with any hospitals?
According to CMS data, Stephen Dorner is affiliated with Massachusetts General Hospital and Martha's Vineyard Hospital Inc.
When was this NPI record last updated?
The NPPES record for Stephen Dorner was last updated on June 9, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Stephen C Dorner, MD · NPI 1376992404
Emergency Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 9, 2016.
## Identity
- **NPI:** 1376992404 (Entity type: Individual)
- **Enumerated:** June 9, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 267091 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST., Boston, MA 02114
- **Phone:** (617) 724-4184
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Martha's Vineyard Hospital, Inc. (NPI 1134206386, Oak Bluffs, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Vanderbilt University School Of Medicine, class of 2016
## Record status
- **NPPES last updated:** June 9, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1376992404) · Data from the CMS NPPES public registry.