DR. CLAYTON PATRICK SMITH MD
NPI 1184184160
Radiology - Radiation Oncology in Portsmouth, NH
About Dr. Clayton Patrick Smith Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CLAYTON PATRICK SMITH MD (NPI 1184184160) is an individual radiation oncology provider in Portsmouth, New Hampshire, licensed in New Hampshire (25062) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with York Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 3
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. Clayton Patrick Smith 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.
Medicare Billing Reassignment
Medicare enrollment records show Clayton Smith reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Manchester, NH 03103
- Reassigned Medicare billing, Massachusetts and New Hampshire enrollments
- 24 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 13
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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
York Hospital
Acute Care Hospitals · York, MEConcord Hospital
Acute Care Hospitals · Concord, NHMary Hitchcock Memorial Hospital
Acute Care Hospitals · Lebanon, NHElliot Hospital
Acute Care Hospitals · Manchester, NHWentworth-Douglass Hospital
Acute Care Hospitals · Dover, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 03801 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Clayton Smith's NPI number?
The NPI number for Clayton Smith is 1184184160. It was assigned to this individual provider in the NPPES registry on March 25, 2019.
Where is Clayton Smith located?
Clayton Smith practices at 121 Corporate Dr, Portsmouth, NH 03801. The listed phone number is (603) 230-6100.
What is Clayton Smith's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Clayton Smith enrolled in Medicare?
Yes. Clayton Smith 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 organization bills Medicare for Clayton Smith's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Clayton Smith reassigns Medicare benefits to Radiation Oncology Associates, PA (Manchester, NH). The 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 Clayton Smith's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Clayton Smith accept?
Health plans from Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and WellSense Health Plan list Clayton Smith 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 Clayton Smith affiliated with any hospitals?
According to CMS data, Clayton Smith is affiliated with York Hospital, Concord Hospital, Mary Hitchcock Memorial Hospital, Elliot Hospital and Wentworth-Douglass Hospital.
When was this NPI record last updated?
The NPPES record for Clayton Smith was last updated on July 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months 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.
# Dr. Clayton Patrick Smith, MD · NPI 1184184160
Radiation Oncology physician in Portsmouth, New Hampshire. Individual provider, active in the CMS NPPES registry since March 25, 2019.
## Identity
- **NPI:** 1184184160 (Entity type: Individual)
- **Enumerated:** March 25, 2019
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **State license:** 25062 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 121 CORPORATE DR, Portsmouth, NH 03801-6895
- **Phone:** (603) 230-6100
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Radiation Oncology Associates, PA (NPI 1245260272, Manchester, NH), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Georgetown University School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** July 22, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1184184160) · Data from the CMS NPPES public registry.