Doctor profile · Federal record
Dr. Clayton Smith, MD
Radiation Oncology Physician (CMS: Radiation Oncology) · Radiation Oncology Physician · General Practice Physician · Student in an Organized Health Care Education/Training Program · Portsmouth, NH
- NPI 1184184160
- Accepts Medicare
- 7 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 4 locations .
- Primary practice
-
121 Corporate Dr
Portsmouth, NH 038016895
(603) 230-6100 - Additional location
-
1000 W Carson St
Torrance, CA 905022004
(303) 513-8943 - Additional location
-
200 Medical Plaza Suite B265
Los Angeles, CA 900952004
(310) 825-9775 - Additional location
-
41 Mall RD Burlington
Burlington, MA 018052004
(781) 744-8780 - Mailing address
-
217 S Barrington Ave Apt 103
Los Angeles, CA 900493331
Show 1 more location
Credentials & registration
- NPI registered
- March 2019 — 7 yrs on file
- Profile last updated
- July 22, 2025
- Year of graduation
- 2019 — 7 yrs since
- Specialty taxonomy
- 2085R0001X — NUCC code
- State licenses (3)
- New Hampshire #25062 · Massachusetts #1017867 · California #A180474
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1184184160. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$306
Transactions
3
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Bioprotect Medical, INC. | 2 | $215.26 | |
| Boston Scientific Corporation | 1 | $90.82 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
12
Patients
0
Total drug cost
$430
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Tamsulosin Hcl | Generic | 12 | 0 | $430 |
Hospital affiliations
Frequently asked questions
What is Dr. Clayton Smith's medical specialty?
Dr. Clayton Smith practices Radiation Oncology Physician in Portsmouth, NH.
Where does Dr. Clayton Smith practice?
Dr. Clayton Smith practices at 121 Corporate Dr, Portsmouth, NH 038016895. Office phone: 6032306100.
What is Dr. Clayton Smith's NPI?
Dr. Clayton Smith's National Provider Identifier (NPI) is 1184184160, issued by NPPES.
Does Dr. Clayton Smith accept Medicare assignment?
Yes. Dr. Clayton Smith accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.