Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Alwin Sebastian, MD

Individual provider Hospitalist Physician · NPI 1740928514

Alwin Sebastian, MD is a Family Practice in Portsmouth, New Hampshire. Qualified in 2021, 5 years ago. Practices with Hni Medical Services, a 35-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New Hampshire and Texas.

Years since qualifying
5
Licensed in
NH, TX
In the registry since
2022
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

333 Borthwick Ave
Portsmouth, NH 03801
Phone: (303) 563-9790
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 311 Route 108, Somersworth, NH 03878-1522 — (603) 749-2346

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence W1223 (TX)
Hospitalist Physician Taxonomy 208M00000X · Licence W1223 (TX)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence R4045 (NH)

Record details

NPI number1740928514
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 23, 2022
Last updated in NPPESSeptember 23, 2025
Certification dateSeptember 23, 2025
Mailing address333 Borthwick Avenue, Portsmouth, NH 03801

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Hni Medical Services — 35 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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