WILLIAM BERK MD
NPI 1184078610
Emergency Medicine in Geneva, OH
About William Berk Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM BERK MD (NPI 1184078610) is an individual emergency medicine provider in Geneva, Ohio, licensed in New York (306121) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS, is affiliated with Aspirus Rhinelander 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
William Berk 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
15Medicare enrollment records show William Berk reassigns Medicare billing to 15 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rochester, NY 14624
- Reassigned Medicare billing, New York enrollment
- 1,442 clinicians in this Medicare group
Rochester, NY 14623
- Reassigned Medicare billing, New York enrollment
- 2,285 clinicians in this Medicare group
Newark, NY 14513
- Reassigned Medicare billing, New York enrollment
- 679 clinicians in this Medicare group
New York, NY 10024
- Reassigned Medicare billing, New York enrollment
- 245 clinicians in this Medicare group
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 1,067 clinicians in this Medicare group
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 325 clinicians in this Medicare group
Juneau, WI 53039
- Reassigned Medicare billing, Wisconsin enrollment
- 1,447 clinicians in this Medicare group
Iola, WI 54945
- Reassigned Medicare billing, Wisconsin enrollment
- 935 clinicians in this Medicare group
Plover, WI 54467
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1952890873 (Wisconsin)
- 2,476 clinicians in this Medicare group
Eagle River, WI 54521
- Reassigned Medicare billing, Wisconsin enrollment
- 262 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 3
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.
Aspirus Rhinelander Hospital
Acute Care Hospitals · Rhinelander, WIMarshfield Medical Center
Acute Care Hospitals · Marshfield, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 44041 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.
GENEVA, OH 44041
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 William Berk's NPI number?
The NPI number for William Berk is 1184078610. It was assigned to this individual provider in the NPPES registry on April 21, 2016.
Where is William Berk located?
William Berk practices at 870 W Main St, Geneva, OH 44041. The listed phone number is (240) 686-2300.
What is William Berk's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is William Berk enrolled in Medicare?
Yes. William Berk 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 William Berk's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Berk reassigns Medicare benefits to 15 organizations: The Unity Hospital Of Rochester (Rochester, NY), Rochester General Hospital (Rochester, NY), Newark Wayne Community Hospital (Newark, NY), Icahn School Of Medicine At Mount Sinai (New York, NY), Fpa Hospital Based (New York, NY) and 10 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 William Berk's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Berk accept?
Health plans from CareSource list William Berk 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 William Berk affiliated with any hospitals?
According to CMS data, William Berk is affiliated with Aspirus Rhinelander Hospital and Marshfield Medical Center.
When was this NPI record last updated?
The NPPES record for William Berk was last updated on May 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# William Berk, MD · NPI 1184078610
Emergency Medicine physician in Geneva, Ohio. Individual provider, active in the CMS NPPES registry since April 21, 2016.
## Identity
- **NPI:** 1184078610 (Entity type: Individual)
- **Enumerated:** April 21, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 306121 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 870 W MAIN ST, Geneva, OH 44041-1219
- **Phone:** (240) 686-2300
## 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:** 15 organizations under Medicare reassignment (form CMS-855R): The Unity Hospital Of Rochester (NPI 1720471246, Rochester, NY); Rochester General Hospital (NPI 1174990303, Rochester, NY); Newark Wayne Community Hospital (NPI 1346369212, Newark, NY); Icahn School Of Medicine At Mount Sinai (NPI 1124392238, New York, NY); Fpa Hospital Based (NPI 1205179140, New York, NY); and 10 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** May 7, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1184078610) · Data from the CMS NPPES public registry.