OLIVER JOHN PRESTON BARNYAK MD
NPI 1831693787
Emergency Medicine in Randolph, VT
About Oliver John Preston Barnyak Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
OLIVER JOHN PRESTON BARNYAK MD (NPI 1831693787) is an individual emergency medicine provider in Randolph, Vermont, licensed in New Hampshire (33916) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with Mary Hitchcock Memorial Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
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
Oliver John Preston Barnyak 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
7Medicare enrollment records show Oliver Barnyak reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Randolph, VT 05060
- Reassigned Medicare billing, Vermont enrollment
- Also billed through NPI 1730199647 (Vermont)
- 167 clinicians in this Medicare group
Woodstock, VT 05091
- Reassigned Medicare billing, Vermont enrollment
- Also billed through NPI 1841287984 (Vermont), NPI 1558358747 (Vermont)
- 101 clinicians in this Medicare group
Lebanon, NH 03756
- Reassigned Medicare billing, New Hampshire enrollment
- 2,999 clinicians in this Medicare group
Lebanon, NH 03756
- Reassigned Medicare billing, New Hampshire enrollment
- 2,620 clinicians in this Medicare group
Lebanon, NH 03766
- Reassigned Medicare billing, New Hampshire enrollment
- Also billed through NPI 1073569810 (New Hampshire)
- 283 clinicians in this Medicare group
Newport, NH 03773
- Reassigned Medicare billing, New Hampshire enrollment
- Also billed through NPI 1639610611 (New Hampshire)
- 219 clinicians in this Medicare group
West Dover, VT 05356
- Reassigned Medicare billing, Vermont enrollment
- 143 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
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mary Hitchcock Memorial Hospital
Acute Care Hospitals · Lebanon, NHGifford Medical Center
Critical Access Hospitals · Randolph, VTMt Ascutney Hospital
Critical Access Hospitals · Windsor, VTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 05060 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.
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 Oliver Barnyak's NPI number?
The NPI number for Oliver Barnyak is 1831693787. It was assigned to this individual provider in the NPPES registry on March 23, 2018.
Where is Oliver Barnyak located?
Oliver Barnyak practices at 44 S Main St, Randolph, VT 05060. The listed phone number is (802) 728-7000.
What is Oliver Barnyak's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Oliver Barnyak enrolled in Medicare?
Yes. Oliver Barnyak 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 Oliver Barnyak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Oliver Barnyak reassigns Medicare benefits to 7 organizations: Gifford Medical Center Inc. (Randolph, VT), Windsor Hospital Corporation (Woodstock, VT), Dartmouth-Hitchcock Clinic (Lebanon, NH), Mary Hitchcock Memorial Hospital (Lebanon, NH), Alice Peck Day Memorial Hospital (Lebanon, NH) and 2 more organizations, listed in the Medicare section above. 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 Oliver Barnyak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Oliver Barnyak accept?
Health plans from Taro Health list Oliver Barnyak 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 Oliver Barnyak affiliated with any hospitals?
According to CMS data, Oliver Barnyak is affiliated with Mary Hitchcock Memorial Hospital, Gifford Medical Center and Mt Ascutney Hospital.
When was this NPI record last updated?
The NPPES record for Oliver Barnyak was last updated on November 22, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.
# Oliver John Preston Barnyak, MD · NPI 1831693787
Emergency Medicine physician in Randolph, Vermont. Individual provider, active in the CMS NPPES registry since March 23, 2018.
## Identity
- **NPI:** 1831693787 (Entity type: Individual)
- **Enumerated:** March 23, 2018
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 33916 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 44 S MAIN ST, Randolph, VT 05060-1381
- **Phone:** (802) 728-7000
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Gifford Medical Center Inc. (NPI 1942329446, Randolph, VT); Windsor Hospital Corporation (NPI 1295832400, Woodstock, VT); Dartmouth-Hitchcock Clinic (NPI 1548210198, Lebanon, NH); Mary Hitchcock Memorial Hospital (NPI 1023092053, Lebanon, NH); Alice Peck Day Memorial Hospital (NPI 1093761892, Lebanon, NH); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Geisel School Of Medicine At Dartmouth, class of 2018
## Record status
- **NPPES last updated:** November 22, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1831693787) · Data from the CMS NPPES public registry.