DR. TRISTON WIHELM GABRIEL BERGER MD
NPI 1124657515
Internal Medicine - Gastroenterology in Norwalk, CT
About Dr. Triston Wihelm Gabriel Berger Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TRISTON WIHELM GABRIEL BERGER MD (NPI 1124657515) is an individual gastroenterology provider in Norwalk, Connecticut, licensed in Minnesota (82339) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, is affiliated with Essentia Health St Mary's Medical Center, and maintains a secondary practice location in Duluth.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Dr. Triston Wihelm Gabriel Berger 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 Reassignment
Medicare enrollment records show Triston Berger reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Duluth, MN 55804
- Reassigned Medicare billing, Minnesota enrollment
- 1,460 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Essentia Health St Mary's Medical Center
Acute Care Hospitals · Duluth, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06856 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NOWALK, CT 06856
NORWALK, CT 06856
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 Triston Berger's NPI number?
The NPI number for Triston Berger is 1124657515. It was assigned to this individual provider in the NPPES registry on April 7, 2020.
Where is Triston Berger located?
Triston Berger practices at Norwalk Hospital 34 Maple Street, Norwalk, CT 06856. The listed phone number is (203) 852-2025.
What is Triston Berger's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Triston Berger enrolled in Medicare?
Yes. Triston Berger 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 organization bills Medicare for Triston Berger's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Triston Berger reassigns Medicare benefits to The Duluth Clinic, Ltd (Duluth, MN). The 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 Triston Berger's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Triston Berger accept?
Health plans from Anthem Blue Cross and Blue Shield, HealthPartners, Sanford Health Plan and Security Health Plan list Triston Berger 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 Triston Berger affiliated with any hospitals?
According to CMS data, Triston Berger is affiliated with Essentia Health St Mary's Medical Center.
When was this NPI record last updated?
The NPPES record for Triston Berger was last updated on August 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.
# Dr. Triston Wihelm Gabriel Berger, MD · NPI 1124657515
Gastroenterology physician in Norwalk, Connecticut. Individual provider, active in the CMS NPPES registry since April 7, 2020.
## Identity
- **NPI:** 1124657515 (Entity type: Individual)
- **Enumerated:** April 7, 2020
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 82339 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** NORWALK HOSPITAL, 34 MAPLE STREET, Norwalk, CT 06856-3815
- **Phone:** (203) 852-2025 · **Fax:** (203) 899-5224
## 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:** The Duluth Clinic, Ltd (NPI 1245278936, Duluth, MN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** August 10, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1124657515) · Data from the CMS NPPES public registry.