Samantha Dayawansa, MD
NPI 1376980649 · Neurological Surgery Physician · Nacogdoches, TX
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Samantha Dayawansa, MD is a Neurological Surgery Physician provider in Nacogdoches, TX (NPI 1376980649).
Provider details
- NPI number
- 1376980649
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 95099 (GA)
Specialties & taxonomies
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
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
206 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 63 | $119 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 41 | $83 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 27 | $74 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 23 | $47 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 20 | $157 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cyclobenzaprine Hcl | 58 | 32 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 50 | 32 |
| Mupirocin | 38 | 36 |
| Methylprednisolone | 37 | 34 |
| Gabapentin | 23 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 21 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$416 across 8 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
Registry dates
- Enumerated
- 2013-05-28
- Last updated
- 2026-01-13
- Certified
- 2026-01-13
Frequently asked questions
- What is Samantha Dayawansa's NPI number?
- Samantha Dayawansa's National Provider Identifier (NPI) is 1376980649, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samantha Dayawansa's specialty?
- Samantha Dayawansa is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Samantha Dayawansa located?
- Samantha Dayawansa's practice location on file with NPPES is 5500 North St, Nacogdoches, TX 75965-1372.
- What is Samantha Dayawansa's phone number?
- The practice phone number listed in the NPPES registry for Samantha Dayawansa is (936) 560-6999.
- Does Samantha Dayawansa accept Medicare?
- Samantha Dayawansa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Samantha Dayawansa's NPI active?
- Yes — Samantha Dayawansa's NPI (1376980649) is active in the NPPES registry as of the last update on 2026-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.