William P. Carter, M.D.
Emergency Medicine Physician · Portsmouth, NH
William P. Carter, M.D. is an emergency medicine physician with a practice address in Portsmouth, New Hampshire, and NPI 1083795116, issued on Oct 17, 2006. Check the license (New Hampshire 13946, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- William P. Carter
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 13946 NH
Self-reported in NPPES; status is on the state search - Practice location
- 333 Borthwick Ave, Portsmouth, NH 03801
- Phone
- (603) 436-5110
- Enumerated
- Oct 17, 2006
- Record last updated
- Feb 21, 2023
- Medicaid IDs
- 30207888 NH
110082238A MA
432976099 ME - Medicare enrollment
- Enrolled (PECOS I20080917000410); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 351 in New Hampshire → Look up another NPI →
Also registered at 333 Borthwick Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Clayton Abeln, MDEmergency Medicine Physician1740926633
- Pahel Agarwal, M.DStudent in an Organized Health Care Education/Training Program1083469829
- Basil Al-Masarweh, MBBSStudent in an Organized Health Care Education/Training Program1346092004
- Nicholas Alana, MDInternal Medicine Physician1922687599
- Donavon Albertson, MDEmergency Medicine Physician1780759027
- Hossam Algamil, M.D.Hospitalist Physician1942429865
Verify William P. Carter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 13946Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average emergency medicine physician in 2024
63 Medicare Part D claims for 42 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $25.28
1 payment: food and beverage; the largest payer was Solventum Corporation. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Core Physicians LLCExeter, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William P. Carter among 351 emergency medicine physician records in New Hampshire
William P. Carter, M.D. is one of 351 emergency medicine physician records with a practice address in New Hampshire. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 53% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2005 · median 2011 among the 205 with a school on file
- Record last updated2023 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 emergency medicine physician records list a practice address in Portsmouth
They are 20 of the 1,860 NPPES records with a practice address in Portsmouth, and 351 emergency medicine physician records in New Hampshire.
All 351 in New Hampshire → Every provider in Portsmouth → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Donavon Albertson, MDPortsmouth, NH 038011780759027
- Samantha ArnoldPortsmouth, NH 038011043758238
- Steven Bos, MDPortsmouth, NH 038011043385388
- Brian Collins, D.O.Portsmouth, NH 038011285730887
- Kelley Hails, M.D.Portsmouth, NH 038011861450405
- David Heller, DOPortsmouth, NH 038011386600815
- Jeffrey Hope, MDPortsmouth, NH 038011508183963
- Aaron McPheters, MDPortsmouth, NH 038011609370311
Common questions
What is William P. Carter, M.D.'s NPI number?
William P. Carter, M.D.'s National Provider Identifier (NPI) is 1083795116, issued on Oct 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William P. Carter, M.D. located?
The NPPES record lists a practice address at 333 Borthwick Ave, Portsmouth, NH, 03801. Phone: (603) 436-5110. Providers update this record themselves, so call before visiting.
How can I verify William P. Carter, M.D.'s license?
NPPES lists New Hampshire license number 13946, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William P. Carter, M.D. prescribe under Medicare Part D?
In 2024, William P. Carter, M.D. had 63 Medicare Part D claims for 42 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.