Clayton Smith, MD
NPI 1184184160 · Radiation Oncology Physician · Portsmouth, NH
Provider details
- NPI number
- 1184184160
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 1017867 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 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
1,152 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) |
|---|---|---|
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 547 | $44 |
| Calculation of Radiation Therapy Dose77300 | 131 | $32 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 130 | $188 |
| Design and Construction of Complex Radiation Treatment Device77334 | 95 | $59 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 47 | $178 |
| Complex Radiation Therapy Planning77263 | 42 | $165 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$306 across 3 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)
- 200 Medical Plaza Suite B265Los Angeles, CA 90095-2004Phone: (310) 825-9775
- 1000 W Carson StTorrance, CA 90502-2004Phone: (303) 513-8943
- 41 Mall Rd BurlingtonBurlington, MA 01805-2004Phone: (781) 744-8780
Registry dates
- Enumerated
- 2019-03-25
- Last updated
- 2025-07-22
- Certified
- 2025-07-22
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.