Karl Sillay, MD
NPI 1184734030 · Neurological Surgery Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Sillay, MD is a Neurological Surgery Physician provider in Nashville, TN (NPI 1184734030).
Provider details
- NPI number
- 1184734030
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 04-50374 (KS)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
168 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 114 | $46 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 21 | $73 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 17 | $121 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 16 | $75 |
Typical Medicare-allowed amounts for these services range $46–$121 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$248 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 11750 W 2nd Pl Ste 255Lakewood, CO 80228-1726Phone: (720) 638-7500Fax: (720) 321-8041
- 2660 Sw 3rd StTopeka, KS 66606-2442Phone: (785) 368-0767Fax: (785) 368-0739
- 1500 Sw 10th AveTopeka, KS 66604-1301Phone: (785) 354-6000
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2026-05-04
- Certified
- 2026-05-04
Frequently asked questions
- What is Karl Sillay's NPI number?
- Karl Sillay's National Provider Identifier (NPI) is 1184734030, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Sillay's specialty?
- Karl Sillay is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Sillay located?
- Karl Sillay's practice location on file with NPPES is 2400 Patterson St Ste 319, Nashville, TN 37203-1566.
- What is Karl Sillay's phone number?
- The practice phone number listed in the NPPES registry for Karl Sillay is (615) 986-1256.
- Does Karl Sillay accept Medicare?
- Karl Sillay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Sillay's NPI active?
- Yes — Karl Sillay's NPI (1184734030) is active in the NPPES registry as of the last update on 2026-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.