Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. KARL A SILLAY MD
NPI 1184734030
Neurological Surgery in Nashville, TN

Active since August 30, 2006PECOS EnrolledAccepts Medicare Assignment
75.75/100
CMS Quality Rating
2400 PATTERSON ST STE 319, NASHVILLE, TN 37203(615) 986-1256(615) 383-0853 Get Directions Write a Review

NPPES record last updated: October 1, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Oct 1, 2026, May 4, 2026, Jan 7, 2025 and 2 more (5 updates tracked since 2016).

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

NPI1184734030
Entity TypeIndividualMale
Primary Taxonomy207T00000X
Provider Legal NameDR. KARL A SILLAYCredential: MD
Location Address2400 PATTERSON ST STE 319Nashville, TN 37203-1566
Mailing AddressPo Box 210127Nashville, TN 37221-0127 · (615) 986-1256 · Fax (615) 383-0853
Fax(615) 383-0853
Sole ProprietorNo
Medical School CMSMedical College Of Georgia School Of MedicineGraduated 1999
Enumeration DateAugust 30, 2006
Last NPPES UpdateOctober 1, 20265 updates tracked since enumeration
NPPES CertifiedOctober 1, 2026
✔ NPI 1184734030 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
Licenses✔ Licensed in TN · 49526✔ Licensed in KS · 04-50374✔ Licensed in CO · DR.0072838✔ Licensed in WI · 50316✔ Licensed in IN · 01093445A
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
2400 PATTERSON ST STE 319, Nashville, TN 37203

Secondary Practice Location 1

Location 111750 W 2nd Pl Ste 255Lakewood, CO 80228-1726 · Phone (720) 638-7500 · Fax (720) 321-8041

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.

PECOS PAC ID941309447
PECOS Enrollment IDI20241219004151, I20250116000806
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

10

Medicare 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.

Orthopaedic Surgery
302 OLD LEBANON DIRT RD FL 2
Hermitage, TN 37076
  • Reassigned Medicare billing, Tennessee enrollment
  • 27 clinicians in this Medicare group
Internal Medicine
301 BROWN SPRINGS RD
Montgomery, AL 36117
  • Reassigned Medicare billing, Alabama enrollment
  • 439 clinicians in this Medicare group
Cardiovascular Disease
7916 W JEFFERSON BLVD
Fort Wayne, IN 46804
  • Reassigned Medicare billing, Indiana enrollment
  • 301 clinicians in this Medicare group
Neurological Surgery
3 MOBILE INFIRMARY CIR STE 410
Mobile, AL 36607
  • Reassigned Medicare billing, Alabama enrollment
  • 12 clinicians in this Medicare group
Multi-Specialty
2350 N LAKE DR
Milwaukee, WI 53211
  • Reassigned Medicare billing, Wisconsin enrollment
  • Medicare enrollment name: Columbia St Marys Hospital Milwaukee Inc
  • 856 clinicians in this Medicare group
Anesthesiology
2301 N LAKE DR
Milwaukee, WI 53211
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,343 clinicians in this Medicare group
Pulmonary Disease
655 W 8TH ST, UFJP PULMONARY
Jacksonville, FL 32209
  • Reassigned Medicare billing, Florida enrollment
  • 1,456 clinicians in this Medicare group
Internal Medicine
901 SW GARFIELD AVE
Topeka, KS 66606
  • Reassigned Medicare billing, Kansas enrollment
  • 854 clinicians in this Medicare group
Multi-Specialty
101 MAIN ST
Neenah, WI 54956
  • Reassigned Medicare billing, Wisconsin enrollment
  • 444 clinicians in this Medicare group
Neurological Surgery
515 W STATE ROAD 434 STE 201
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.

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
114 services43 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
21 services16 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
17 services17 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
16 services15 patients

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, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150011
Location441 N Wabash AveMarion, IN 46952 · Grant County
Emergency services Birthing friendly

Lutheran Hospital Of Indiana

Acute Care Hospitals · Fort Wayne, IN
3/5 CMS rating
OwnershipProprietary
CMS Certification Number150017
Location7950 W Jefferson BlvdFort Wayne, IN 46804 · Allen County
Emergency services Birthing friendly

Kosciusko Community Hospital

Acute Care Hospitals · Warsaw, IN
2/5 CMS rating
OwnershipProprietary
CMS Certification Number150133
Location2101 E Dubois DrWarsaw, IN 46580 · Kosciusko County
Emergency services Birthing friendly

Stormont Vail Hospital

Acute Care Hospitals · Topeka, KS
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number170086
Location1500 SW 10th AvenueTopeka, KS 66604 · Shawnee County
Emergency services Birthing friendly

North Mississippi Medical Center

Acute Care Hospitals · Tupelo, MS
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number250004
Location830 S Gloster StreetTupelo, MS 38801 · Lee County
Emergency services Birthing friendly

Physician 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.

New Patient
$121.80 typical visit price
range $52.64 – $160.89
Typical copayment $30.45 (range $13.16 – $40.22)
Most-billed visit code 99204
Established Patient
$66.01 typical visit price
range $16.72 – $131.41
Typical copayment $16.50 (range $4.18 – $32.85)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

75.75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality78.16
Promoting Interoperability76
Improvement Activities40
Cost57.63

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.

Nurse Practitioner (Acute Care)
2400 PATTERSON ST STE 319
NASHVILLE, TN 37203
Physician Assistant (Surgical)
2400 PATTERSON ST STE 319
NASHVILLE, TN 37203
Nurse Practitioner (Adult Health)
2400 PATTERSON ST STE 319
NASHVILLE, TN 37203
Physician Assistant (Surgical)
2400 PATTERSON ST STE 319
NASHVILLE, TN 37203
Physician Assistant (Surgical)
2400 PATTERSON ST STE 319
NASHVILLE, TN 37203
Nurse Practitioner (Family)
2400 PATTERSON ST STE 319
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.