DR. KARL A SILLAY MD
NPI 1184734030
Neurological Surgery in Nashville, TN
About Dr. Karl A Sillay Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KARL A SILLAY MD (NPI 1184734030) is an individual neurological surgery provider in Nashville, Tennessee, licensed in Tennessee (49526) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Marion General Hospital, and maintains a secondary practice location in Lakewood.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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. Karl A Sillay 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
10Medicare enrollment records show Karl Sillay reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hermitage, TN 37076
- Reassigned Medicare billing, Tennessee enrollment
- 27 clinicians in this Medicare group
Montgomery, AL 36117
- Reassigned Medicare billing, Alabama enrollment
- 439 clinicians in this Medicare group
Fort Wayne, IN 46804
- Reassigned Medicare billing, Indiana enrollment
- 301 clinicians in this Medicare group
Mobile, AL 36607
- Reassigned Medicare billing, Alabama enrollment
- 12 clinicians in this Medicare group
Milwaukee, WI 53211
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Columbia St Marys Hospital Milwaukee Inc
- 856 clinicians in this Medicare group
Milwaukee, WI 53211
- Reassigned Medicare billing, Wisconsin enrollment
- 1,343 clinicians in this Medicare group
Jacksonville, FL 32209
- Reassigned Medicare billing, Florida enrollment
- 1,456 clinicians in this Medicare group
Topeka, KS 66606
- Reassigned Medicare billing, Kansas enrollment
- 854 clinicians in this Medicare group
Neenah, WI 54956
- Reassigned Medicare billing, Wisconsin enrollment
- 444 clinicians in this Medicare group
Longwood, FL 32750
- Reassigned Medicare billing, Florida enrollment
- 2 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 4
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.
Marion General Hospital
Acute Care Hospitals · Marion, INLutheran Hospital Of Indiana
Acute Care Hospitals · Fort Wayne, INKosciusko Community Hospital
Acute Care Hospitals · Warsaw, INStormont Vail Hospital
Acute Care Hospitals · Topeka, KSNorth Mississippi Medical Center
Acute Care Hospitals · Tupelo, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 37203 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.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NASHVILLE, TN 37203
NASHVILLE, TN 37203
NASHVILLE, TN 37203
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 Karl Sillay's NPI number?
The NPI number for Karl Sillay is 1184734030. It was assigned to this individual provider in the NPPES registry on August 30, 2006.
Where is Karl Sillay located?
Karl Sillay practices at 2400 Patterson St Ste 319, Nashville, TN 37203. The listed phone number is (615) 986-1256.
What is Karl Sillay's specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Karl Sillay enrolled in Medicare?
Yes. Karl Sillay 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 Karl Sillay's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karl Sillay reassigns Medicare benefits to 10 organizations: Nashville Bone And Joint PLLC (Hermitage, TN), Health Care Authority For Baptist Health, An Affiliate Of Uabhs (Montgomery, AL), Lutheran Medical Group LLC (Fort Wayne, IN), Imc-Neurosurgery LLC (Mobile, AL), Columbia St. Mary's Hospital Milwaukee, Inc (Milwaukee, WI) and 5 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 Karl Sillay's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karl Sillay accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 2 other insurers list Karl Sillay 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 Karl Sillay affiliated with any hospitals?
According to CMS data, Karl Sillay is affiliated with Marion General Hospital, Lutheran Hospital Of Indiana, Kosciusko Community Hospital, Stormont Vail Hospital and North Mississippi Medical Center.
When was this NPI record last updated?
The NPPES record for Karl Sillay was last updated on October 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 days 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.