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

Douglas J Black MD LLC

Organization Neurology Physician · NPI 1134435613

Douglas J Black MD LLC provides Neurology Physician services in Portsmouth, New Hampshire. Licensed in New Hampshire. Registered with an NPI since 2010.

Licensed in
NH
In the registry since
2010
What do these letters mean?
LLC — Limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

875 Greenland Rd Ste B4
Portsmouth, NH 03801 Not confirmed with CMS for 15 years — call before visiting
Phone: (603) 427-2577
Fax: (603) 427-0048
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence 10894 (NH)

Record details

NPI number1134435613
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Douglas Black Md Llc — Owner · (603) 427-2577
NPI enumeratedAugust 23, 2010
Last updated in NPPESMay 18, 2011
Mailing address875 Greenland Rd, Suite B4, Portsmouth, NH 03801

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