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

Individual provider Obstetrics & Gynecology Physician · NPI 1336179878

Mark A Chag, MD is an Obstetrics & Gynecology Physician in Portsmouth, New Hampshire. Licensed in New Hampshire. Registered with an NPI since 2006.

Licensed in
NH
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 Partly verified

Some contact details are missing from the federal record.

Harbour Women's Health 155 Griffin Rd
Portsmouth, NH 03801-4125
Phone: (603) 431-6011
Fax: (603) 431-6227
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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 6723 (NH)

Record details

NPI number1336179878
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 3, 2006
Last updated in NPPESMarch 7, 2023

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