William Carter, M.D.
NPI 1083795116 · Emergency Medicine Physician · Portsmouth, NH
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Carter, M.D. is a Emergency Medicine Physician provider in Portsmouth, NH (NPI 1083795116).
Provider details
- NPI number
- 1083795116
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 13946 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
721 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 277 | $63 |
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less11042 | 175 | $59 |
| Removal of Tissue From Wound, 20.0 Sq Cm Or Less97597 | 130 | $35 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 96 | $81 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 28 | $35 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$25 across 1 record (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
- 2006-10-17
- Last updated
- 2023-02-21
- Certified
- 2023-02-21
Frequently asked questions
- What is William Carter's NPI number?
- William Carter's National Provider Identifier (NPI) is 1083795116, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Carter's specialty?
- William Carter is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Carter located?
- William Carter's practice location on file with NPPES is 333 Borthwick Ave, Portsmouth, NH 03801-7128.
- What is William Carter's phone number?
- The practice phone number listed in the NPPES registry for William Carter is (603) 436-5110.
- Does William Carter accept Medicare?
- William Carter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Carter's NPI active?
- Yes — William Carter's NPI (1083795116) is active in the NPPES registry as of the last update on 2023-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.