DR. ANASTASIA KARABATSOS SIATRAS D.O.
NPI 1912163577
Radiology - Diagnostic Radiology in Merrillville, IN
About Dr. Anastasia Karabatsos Siatras D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANASTASIA KARABATSOS SIATRAS D.O. (NPI 1912163577) is an individual diagnostic radiology provider in Merrillville, Indiana, licensed in Illinois (125-050874) and active in the NPI registry since August 2008. She is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Central Dupage Hospital, and is a graduate of Other (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. Anastasia Karabatsos Siatras D.o. 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
2Medicare enrollment records show Anastasia Siatras reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Merrillville, IN 46410
- Reassigned Medicare billing, Indiana enrollment
- 17 clinicians in this Medicare group
Schererville, IN 46375
- Reassigned Medicare billing, Indiana enrollment
- 14 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 35
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northwestern Medicine Central Dupage Hospital
Acute Care Hospitals · Winfield, ILMethodist Hospitals Inc
Acute Care Hospitals · Gary, INSt Catherine Hospital Inc
Acute Care Hospitals · East Chicago, INSt Mary Medical Center Inc
Acute Care Hospitals · Hobart, INCommunity Hospital
Acute Care Hospitals · Munster, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 46410 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
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.
MERRILLVILLE, IN 46410
MERRILLVILLE, IN 46410
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 Anastasia Siatras's NPI number?
The NPI number for Anastasia Siatras is 1912163577. It was assigned to this individual provider in the NPPES registry on August 4, 2008.
Where is Anastasia Siatras located?
Anastasia Siatras practices at 8701 Broadway, Merrillville, IN 46410. The listed phone number is (219) 738-5565.
What is Anastasia Siatras's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Anastasia Siatras enrolled in Medicare?
Yes. Anastasia Siatras 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 Anastasia Siatras's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Anastasia Siatras reassigns Medicare benefits to 2 organizations: N W Indiana Radiology Services, PC (Merrillville, IN) and Advanced Imaging Center LLC (Schererville, IN). 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 Anastasia Siatras's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Anastasia Siatras accept?
Health plans from CareSource list Anastasia Siatras 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 Anastasia Siatras affiliated with any hospitals?
According to CMS data, Anastasia Siatras is affiliated with Northwestern Medicine Central Dupage Hospital, Methodist Hospitals Inc, St Catherine Hospital Inc, St Mary Medical Center Inc and Community Hospital.
When was this NPI record last updated?
The NPPES record for Anastasia Siatras was last updated on June 7, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.