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

Christyn Sieve PSYD Psychological Services PLLC

Organization Adult Mental Health Clinic/Center · NPI 1326636903

Christyn Sieve PSYD Psychological Services PLLC is an Adult Mental Health Clinic/Center in Portsmouth, New Hampshire. Registered with an NPI since 2021.

In the registry since
2021
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

439 Middle St
Portsmouth, NH 03801-5080
Phone: (603) 498-1575
Show map & directions

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

Specialties & licences

Adult Mental Health Clinic/Center (primary) Taxonomy 261QM0850X

Record details

NPI number1326636903
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Christyn Sieve — Clinical Psychologist · (603) 498-1575
NPI enumeratedJanuary 8, 2021
Last updated in NPPESJanuary 8, 2021
Certification dateJanuary 8, 2021
Mailing address45 Brackett Rd, Portsmouth, NH 03801-5261

Other providers in Portsmouth