Alwin Sebastian, M.D.
NPI 1740928514 · Family Medicine Physician · Portsmouth, NH
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alwin Sebastian, M.D. is a Family Medicine Physician provider in Portsmouth, NH (NPI 1740928514).
Provider details
- NPI number
- 1740928514
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- W1223 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 75 | 31 |
| Lisinopril | 35 | 16 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 31 | — |
| Gabapentin | 25 | 13 |
| Levothyroxine Sodium | 24 | — |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 24 | — |
Practice location
Mailing address
Additional practice locations (1)
- 311 Route 108Somersworth, NH 03878-1522Phone: (603) 749-2346Fax: (603) 953-0066
Registry dates
- Enumerated
- 2022-05-23
- Last updated
- 2025-09-23
- Certified
- 2025-09-23
Frequently asked questions
- What is Alwin Sebastian's NPI number?
- Alwin Sebastian's National Provider Identifier (NPI) is 1740928514, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alwin Sebastian's specialty?
- Alwin Sebastian is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alwin Sebastian located?
- Alwin Sebastian's practice location on file with NPPES is 333 Borthwick Avenue, Portsmouth, NH 03801.
- What is Alwin Sebastian's phone number?
- The practice phone number listed in the NPPES registry for Alwin Sebastian is (303) 563-9790.
- Does Alwin Sebastian accept Medicare?
- Alwin Sebastian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alwin Sebastian's NPI active?
- Yes — Alwin Sebastian's NPI (1740928514) is active in the NPPES registry as of the last update on 2025-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.