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

Dr. Howard Douglas Klein, MD

Individual provider Internal Medicine Physician · NPI 1063456325

Dr. Howard Douglas Klein, MD is an Internal Medicine Physician in Northampton, Massachusetts. Licensed in Connecticut. Registered with an NPI since 2006.

Licensed in
CT
In the registry since
2006
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

421 N Main St
Northampton, MA 01060-5302
Phone: (413) 584-4040
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 027988 (CT)

Record details

NPI number1063456325
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 16, 2006
Last updated in NPPESJuly 13, 2026
Mailing address421 N Main St, Northampton, MA 01060-5302

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