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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

SETH HEIRTZLER
NPI 1588574412
Counselor in Portsmouth, NH

Active since September 11, 2026
1145 SAGAMORE AVE, PORTSMOUTH, NH 03801(603) 431-6703(603) 430-3753 Get Directions Write a Review

NPPES record added: September 11, 2026. Verified against the NPPES registry weekly; last sync: September 13, 2026.

About Seth Heirtzler NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SETH HEIRTZLER (NPI 1588574412) is an individual counselor in Portsmouth, New Hampshire and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1588574412
Entity TypeIndividualMale
Primary Taxonomy101Y00000X
Provider Legal NameSETH HEIRTZLER
Location Address1145 SAGAMORE AVEPortsmouth, NH 03801-5585
Mailing Address1145 Sagamore AvePortsmouth, NH 03801-5585 · (603) 431-6703 · Fax (603) 430-3753
Phone(603) 431-6703
Fax(603) 430-3753
Sole ProprietorNo
Enumeration DateSeptember 11, 2026
NPPES CertifiedSeptember 11, 2026
✔ NPI 1588574412 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselorBehavioral Health & Social Service Providers
Taxonomy Code101Y00000X
Definition
A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.
1145 SAGAMORE AVE, Portsmouth, NH 03801
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HEATH GRAY
Counselor (Mental Health)
1145 SAGAMORE AVE
PORTSMOUTH, NH 03801
Rockingham County (603) 431-6703
MR. PHILIP GIBSON
Social Worker (Clinical)
1145 SAGAMORE AVE
PORTSMOUTH, NH 03801
Rockingham County (603) 431-6703
RACHEL GARDNER
Counselor
1145 SAGAMORE AVE
PORTSMOUTH, NH 03801
Rockingham County (603) 431-6703
ABIGAIL GERBINO
Counselor
1145 SAGAMORE AVE
PORTSMOUTH, NH 03801
Rockingham County (603) 431-6703
JULIANA DEFEO
Counselor
1145 SAGAMORE AVE
PORTSMOUTH, NH 03801
Rockingham County (603) 431-6703
SEACOAST MENTAL HEALTH CENTER, INC.
Clinic/Center (Mental Health (Including Community Mental Health Center))
1145 SAGAMORE AVE
PORTSMOUTH, NH 03801
Rockingham County (603) 431-6703
KRISTY MICHAUD
Case Manager/Care Coordinator
1145 SAGAMORE AVE
PORTSMOUTH, NH 03801
Rockingham County (603) 431-6703
MARIA BICK LICSW
Social Worker (Clinical)
1145 SAGAMORE AVE
PORTSMOUTH, NH 03801
Rockingham County (603) 431-6703

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Seth Heirtzler's NPI number?

The NPI number for Seth Heirtzler is 1588574412. It was assigned to this individual provider in the NPPES registry on September 11, 2026.

Where is Seth Heirtzler located?

Seth Heirtzler practices at 1145 Sagamore Ave, Portsmouth, NH 03801. The listed phone number is (603) 431-6703.

What is Seth Heirtzler's specialty?

The primary specialty registered for this NPI is Counselor with taxonomy code 101Y00000X.

When was this NPI record last updated?

The NPPES record for Seth Heirtzler was last updated on September 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.