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

Irving S Smith, DO

Individual provider Sleep Medicine (Internal Medicine) Physician · NPI 1023206968

Irving S Smith, DO is an Internal Medicine in Littleton, New Hampshire. Graduated from Nova Southeastern College of Osteo Medicine in 2004, 22 years ago. Practices with Weeks Medical Center, a 69-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
22
Trained at
Nova Southeastern College of Osteo Medicine
Licensed in
CT
In the registry since
2007
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

580 St Johnsbury Rd
Littleton, NH 03561
Phone: (860) 364-7029
Fax: (860) 364-7079
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Sleep Medicine (Internal Medicine) Physician (primary) Taxonomy 207RS0012X · Licence 048601 (CT)
Internal Medicine Physician Taxonomy 207R00000X · Licence 048601 (CT)

Record details

NPI number1023206968
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedOctober 4, 2007
Last updated in NPPESAugust 24, 2015

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesSLEEP MEDICINE
Medical schoolNOVA SOUTHEASTERN COLLEGE OF OSTEO MEDICINE
Graduated 2004 (22 years in practice)
Group practice Weeks Medical Center — 69 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare