CLAYTON SEAN ABELN MD
NPI 1740926633
Emergency Medicine in Portsmouth, NH
About Clayton Sean Abeln Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CLAYTON SEAN ABELN MD (NPI 1740926633) is an individual emergency medicine provider in Portsmouth, New Hampshire, licensed in New Hampshire (39597) and active in the NPI registry since May 2022. He is enrolled in Medicare PECOS, is affiliated with Frisbie Memorial Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
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
Clayton Sean Abeln 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 Reassignments
2Medicare enrollment records show Clayton Abeln reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Derry, NH 03038
- Reassigned Medicare billing, New Hampshire enrollment
- 145 clinicians in this Medicare group
Hamden, CT 06514
- Reassigned Medicare billing, Connecticut enrollment
- 3,728 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Frisbie Memorial Hospital
Acute Care Hospitals · Rochester, NHPortsmouth Regional Hospital
Acute Care Hospitals · Portsmouth, 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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTSMOUTH, NH 03801
PORTSMOUTH, NH 03801
PORTSMOUTH, NH 03801
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 Abeln's NPI number?
The NPI number for Clayton Abeln is 1740926633. It was assigned to this individual provider in the NPPES registry on May 12, 2022.
Where is Clayton Abeln located?
Clayton Abeln practices at 333 Borthwick Ave, Portsmouth, NH 03801. The listed phone number is (603) 436-5110.
What is Clayton Abeln's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Clayton Abeln enrolled in Medicare?
Yes. Clayton Abeln 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 organizations bill Medicare for Clayton Abeln's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Clayton Abeln reassigns Medicare benefits to 2 organizations: Emergency Medicine Services Of Nh, LLC (Derry, NH) and Yale University (Hamden, CT). Each 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 Abeln's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Clayton Abeln affiliated with any hospitals?
According to CMS data, Clayton Abeln is affiliated with Frisbie Memorial Hospital and Portsmouth Regional Hospital.
When was this NPI record last updated?
The NPPES record for Clayton Abeln was last updated on July 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Clayton Sean Abeln, MD · NPI 1740926633
Emergency Medicine physician in Portsmouth, New Hampshire. Individual provider, active in the CMS NPPES registry since May 12, 2022.
## Identity
- **NPI:** 1740926633 (Entity type: Individual)
- **Enumerated:** May 12, 2022
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 39597 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 333 BORTHWICK AVE, Portsmouth, NH 03801-4198
- **Phone:** (603) 436-5110
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Emergency Medicine Services Of Nh, LLC (NPI 1386341444, Derry, NH); Yale University (NPI 1134391824, Hamden, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** July 12, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1740926633) · Data from the CMS NPPES public registry.