DR. EFFIE E. SIOMOS M.D.
NPI 1376589572
Obstetrics & Gynecology in Berlin, WI
About Dr. Effie E. Siomos M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. EFFIE E. SIOMOS M.D. (NPI 1376589572) is an individual obstetrics & gynecology provider in Berlin, Wisconsin, licensed in Wisconsin (51386-20) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Thedacare Regional Medical Center - Appleton Inc, and is a graduate of University Of Wisconsin School Of Medicine (2006).
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
Dr. Effie E. Siomos 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.
Medicare Billing Reassignments
3Medicare enrollment records show Effie Siomos reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oshkosh, WI 54904
- Reassigned Medicare billing, Wisconsin enrollment
- 194 clinicians in this Medicare group
Neenah, WI 54956
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Womens Care Of Wisconsin Sc
- 30 clinicians in this Medicare group
Neenah, WI 54956
- Reassigned Medicare billing, Wisconsin enrollment
- 15 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 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, WIBerlin Memorial Hospital
Critical Access Hospitals · Berlin, WIPhysician 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.
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 Effie Siomos's NPI number?
The NPI number for Effie Siomos is 1376589572. It was assigned to this individual provider in the NPPES registry on June 22, 2006.
Where is Effie Siomos located?
Effie Siomos practices at 225 Memorial Dr Ste 2030, Berlin, WI 54923. The listed phone number is (920) 729-7105.
What is Effie Siomos's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Effie Siomos enrolled in Medicare?
Yes. Effie Siomos 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 Effie Siomos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Effie Siomos reassigns Medicare benefits to 3 organizations: Ascension NE Wisconsin, Inc (Oshkosh, WI), Women's Care Of Wisconsin S.C. (Neenah, WI) and Theda Clark Ob Hospitalists Sc (Neenah, WI). 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 Effie Siomos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Effie Siomos accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare), HealthPartners and Network Health and 2 other insurers list Effie Siomos 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 Effie Siomos affiliated with any hospitals?
According to CMS data, Effie Siomos is affiliated with Thedacare Regional Medical Center - Appleton Inc and Berlin Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Effie Siomos was last updated on April 27, 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.
# Dr. Effie E. Siomos, M.D. · NPI 1376589572
Obstetrics & Gynecology physician in Berlin, Wisconsin. Individual provider, active in the CMS NPPES registry since June 22, 2006.
## Identity
- **NPI:** 1376589572 (Entity type: Individual)
- **Enumerated:** June 22, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 51386-20 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 225 MEMORIAL DR STE 2030, Berlin, WI 54923-1243
- **Phone:** (920) 729-7105
## 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): Ascension NE Wisconsin, Inc (NPI 1912527193, Oshkosh, WI); Women's Care Of Wisconsin S.C. (NPI 1003811993, Neenah, WI); Theda Clark Ob Hospitalists Sc (NPI 1295510196, Neenah, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Wisconsin School Of Medicine, class of 2006
## Record status
- **NPPES last updated:** April 27, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1376589572) · Data from the CMS NPPES public registry.