Physician Profile
Alwin Sebastian, M.D.
Unclaimed ProfileAbout Dr. Sebastian
Alwin Sebastian, M.D. is a healthcare provider in Portsmouth, NH specializing in family medicine. Alwin is also listed as specializing in student in an organized health care education program.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (303) 563-9790
- Email not available
Practice Locations
333 BORTHWICK AVENUE
Portsmouth, NH 03801
311 Route 108
Somersworth, NH 03878
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other family doctors at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 23 related providers in 3 groups
Other family doctors in Portsmouth 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2021 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Alwin Sebastian?
Alwin Sebastian is a family doctor in Portsmouth, NH. That is the designation recorded for this NPI in the federal registry, where it is listed as “Family Medicine”.
NPI registry
What is Alwin Sebastian's address?
Alwin Sebastian is listed at 333 Borthwick Avenue, Portsmouth, NH 03801. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Alwin Sebastian?
The number on file is (303) 563-9790. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Alwin Sebastian's NPI number?
Alwin Sebastian's National Provider Identifier is 1740928514. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Alwin Sebastian train?
Alwin Sebastian attended Other, graduating in 2021. This comes from the CMS National Downloadable File.
CMS public data
How long has Alwin Sebastian been practicing?
Alwin Sebastian has 5 years experience. Calculated from a graduation year of 2021, reported in the CMS National Downloadable File.
CMS public data
Has Alwin Sebastian confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Alwin Sebastian. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.