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ERIN K EFEREM M.D.
NPI 1700106796
Emergency Medicine in Berlin, WI

Active since June 02, 2010PECOS EnrolledAccepts Medicare Assignment
225 MEMORIAL DR, BERLIN, WI 54923(920) 361-5525 Get Directions Write a Review

NPPES record last updated: April 26, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Erin K Eferem M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ERIN K EFEREM M.D. (NPI 1700106796) is an individual emergency medicine provider in Berlin, Wisconsin, licensed in Wisconsin (60303-20) and active in the NPI registry since June 2010. She is enrolled in Medicare PECOS, is affiliated with Thedacare Regional Medical Center - Appleton Inc, and maintains a secondary practice location in Appleton.

NPPES Registry Identity

NPI1700106796
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameERIN K EFEREMCredential: M.D.
Location Address225 MEMORIAL DRBerlin, WI 54923-1243
Mailing Address3 Neenah CtrNeenah, WI 54956-3070 · (920) 361-5525 · Fax (920) 361-5925
Phone(920) 361-5525
Sole ProprietorNo
Medical School CMSMedical College Of WisconsinGraduated 2010
Enumeration DateJune 2, 2010
Last NPPES UpdateApril 26, 2022
NPPES CertifiedApril 26, 2022
✔ NPI 1700106796 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in WI · 60303-20✔ Licensed in MI · 4301096495
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
225 MEMORIAL DR, Berlin, WI 54923
Open in Google Maps ↗

Other Names 1

Former Name (1)Erin K Mathewson M.d.

Secondary Practice Location 1

Location 11506 S Oneida StAppleton, WI 54915-1305 · Phone (414) 290-6720 · Fax (414) 290-6755

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare).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

Erin K Eferem M.d. 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.

PECOS PAC ID8426282534
PECOS Enrollment IDI20131003000220
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

6

Medicare enrollment records show Erin Eferem reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Thedacare Medical Center - Berlin, Inc.
Same address
Anesthesiology
225 MEMORIAL DR
Berlin, WI 54923
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1760413777 (Wisconsin)
  • 104 clinicians in this Medicare group
NPI 1275943367 (920) 361-5538
Thedacare Regional Medical Center - Appleton, Inc.
20 mi
General Acute Care Hospital
250 W. 6TH AVENUE
Oshkosh, WI 54902
  • Reassigned Medicare billing, Wisconsin enrollment
  • 35 clinicians in this Medicare group
NPI 1912880329 (920) 731-4101
Thedacare Medical Center - Wild Rose, Inc
21 mi
Critical Access
601 GROVE AVE
Wild Rose, WI 54984
  • Reassigned Medicare billing, Wisconsin enrollment
  • 42 clinicians in this Medicare group
NPI 1043263999 (920) 622-3257
Thedacare Medical Center - Waupaca, Inc.
24 mi
Critical Access
N2610 WI 22
Waupaca, WI 54981
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1780782680 (Wisconsin)
  • 85 clinicians in this Medicare group
NPI 1710333893 (715) 258-1021
Thedacare Medical Center - New London, Inc.
30 mi
Critical Access
1405 MILL ST
New London, WI 54961
  • Reassigned Medicare billing, Wisconsin enrollment
  • 106 clinicians in this Medicare group
NPI 1538127220 (920) 531-2092
Thedacare Medical Center - Shawano, Inc.
55 mi
Critical Access
100 COUNTY ROAD B
Shawano, WI 54166
  • Reassigned Medicare billing, Wisconsin enrollment
  • 70 clinicians in this Medicare group
NPI 1548260839 (715) 526-2111

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 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Thedacare Regional Medical Center - Appleton Inc

Acute Care Hospitals · Appleton, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520160
Location1818 N Meade StAppleton, WI 54911 · Outagamie County
Emergency services Birthing friendly

Berlin Memorial Hospital

Critical Access Hospitals · Berlin, WI
OwnershipVoluntary non-profit - Private
CMS Certification Number521355
Location225 Memorial DriveBerlin, WI 54923 · Green Lake County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54923 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$82.92 typical visit price
range $53.90 – $163.24
Typical copayment $20.73 (range $13.47 – $40.81)
Most-billed visit code 99203
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. COURTNEY DISTERHAFT DPT
Physical Therapist
225 MEMORIAL DR
BERLIN, WI 54923
Green Lake County (920) 361-1313
BARRY L ROGERS MD
Surgery
225 MEMORIAL DR, STE 2000
BERLIN, WI 54923
Green Lake County (920) 361-5340
CENTRAL WISCONSIN ANESTHESI
Anesthesiology
225 MEMORIAL DR
BERLIN, WI 54923
Green Lake County (920) 361-5538
JESSICA JO TOMASIEWICZ
Nurse Anesthetist, Certified Registered
225 MEMORIAL DR
BERLIN, WI 54923
Green Lake County (920) 361-5538
DR. JAMES S HEINZEN M.D.
Emergency Medicine
225 MEMORIAL DR
BERLIN, WI 54923
Green Lake County (920) 361-5525
EMILY ANNE RADEMACHER COTA
Occupational Therapy Assistant
225 MEMORIAL DR
BERLIN, WI 54923
Green Lake County (920) 361-1313
DANIEL KENNETH LEMBERGER APNP
Nurse Practitioner (Adult Health)
225 MEMORIAL DR
BERLIN, WI 54923
Green Lake County (920) 361-1313
TONY D SINGH CRNA
Nurse Anesthetist, Certified Registered
225 MEMORIAL DR
BERLIN, WI 54923
Green Lake County (920) 361-5538

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 Erin Eferem's NPI number?

The NPI number for Erin Eferem is 1700106796. It was assigned to this individual provider in the NPPES registry on June 2, 2010. The provider is also known as Erin K Mathewson M.D..

Where is Erin Eferem located?

Erin Eferem practices at 225 Memorial Dr, Berlin, WI 54923. The listed phone number is (920) 361-5525.

What is Erin Eferem's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Erin Eferem enrolled in Medicare?

Yes. Erin Eferem 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 Erin Eferem's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Erin Eferem reassigns Medicare benefits to 6 organizations: Thedacare Medical Center - Berlin, Inc. (Berlin, WI), Thedacare Regional Medical Center - Appleton, Inc. (Oshkosh, WI), Thedacare Medical Center - Wild Rose, Inc (Wild Rose, WI), Thedacare Medical Center - Waupaca, Inc. (Waupaca, WI), Thedacare Medical Center - New London, Inc. (New London, WI) and 1 more organization, 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 Erin Eferem's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Erin Eferem accept?

Health plans from CareSource (Common Ground Healthcare) list Erin Eferem 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 Erin Eferem affiliated with any hospitals?

According to CMS data, Erin Eferem is affiliated with Thedacare Regional Medical Center - Appleton Inc and Berlin Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Erin Eferem was last updated on April 26, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.