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

Dr. Lars Erling Nielson, MD

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1740267848

Dr. Lars Erling Nielson, MD is an Addiction (Substance Use Disorder) Counselor in Lancaster, New Hampshire. Licensed in New Hampshire. Registered with an NPI since 2005.

Licensed in
NH
In the registry since
2005
Specialties on file
2
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

170 Middle St
Lancaster, NH 03584-3556
Phone: (603) 788-2521
Fax: (603) 788-5027
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 8303 (NH)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X

Record details

NPI number1740267848
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 29, 2005
Last updated in NPPESApril 17, 2019
Mailing address173 Middle St, Lancaster, NH 03584-3508

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