NPPES file of Aug 9, 2026

Tristram Heyward Dashti-Gibson, LCMHC

Mental Health Counselor · Portsmouth, NH

Tristram Heyward Dashti-Gibson, LCMHC is a mental health counselor with a practice address in Portsmouth, New Hampshire, and NPI 1588729990, issued on Dec 26, 2006. Check the license (New Hampshire 993, as entered in NPPES) with the New Hampshire board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1588729990
Name
Tristram Heyward Dashti-Gibson
Credential
LCMHC
Primary taxonomy
Mental Health Counselor 101YM0800X
License numbers
993 NH
CC3922 ME
Self-reported in NPPES; status is on the state search
Practice location
539 Islington St Ste 4, Portsmouth, NH 03801
Phone
(603) 689-7890
Enumerated
Dec 26, 2006
Record last updated
Dec 4, 2024
Fax
(603) 883-0007
Medicare enrollment
Enrolled (PECOS I20240409003456); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest mental health counselor records → All 2,284 in New Hampshire → Look up another NPI →

Also registered at 539 Islington St Ste 4

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Dawna Conversano, LCMHCMental Health Counselor1245435981
  2. Katheryne GrijalvaClinical Social Worker1295365906
  3. Lori Santana, LICSWClinical Social Worker1881899508
  4. Lili Wierbonics, APRNPsychiatric/Mental Health Nurse Practitioner1174690259

Verify Tristram Heyward Dashti-Gibson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New Hampshire board licenses this profession
    Search for license 993    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the New Hampshire license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. The Counseling Center OF Nashua IncPortsmouth, NH

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Tristram Heyward Dashti-Gibson among 2,284 mental health counselor records in New Hampshire

Tristram Heyward Dashti-Gibson, LCMHC is one of 2,284 mental health counselor records with a practice address in New Hampshire. 12% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than under 1% of them.

  • NPI issued2006 · under 1% of these records are older, 90% newer
  • In a Medicare fileYes · 12% of these records are
  • In the CMS Doctors and Clinicians fileYes · 17% of these records are
  • Graduated1997 · median 2014 among the 379 with a school on file
  • Record last updated2024 · 57% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101YM0800X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

154 mental health counselor records list a practice address in Portsmouth

They are 154 of the 1,860 NPPES records with a practice address in Portsmouth, and 2,284 mental health counselor records in New Hampshire.

All 2,284 in New Hampshire → Every provider in Portsmouth → Mental Health Counselor nationwide →

The 8 mental health counselor records with the nearest ZIP codes

  1. Ramona Abella, LCMHCPortsmouth, NH 038011134218480
  2. John Burbank, M.ED, LCMHCPortsmouth, NH 038011619041274
  3. David Ceglia, M.ED., LCMHCPortsmouth, NH 038011770657280
  4. Susan Chase, MA IN COUNSELINGPortsmouth, NH 038011760556351
  5. Gretchen Estes, LCMHCPortsmouth, NH 038011174697437
  6. Lisa Gallo, LCMHCNewington, NH 038011366542805
  7. Julie Golkowski, LCMHCPortsmouth, NH 038011164597621
  8. Pamela Henry, M.A.,LCMHCPortsmouth, NH 038011154417566

Common questions

What is Tristram Heyward Dashti-Gibson, LCMHC's NPI number?

Tristram Heyward Dashti-Gibson, LCMHC's National Provider Identifier (NPI) is 1588729990, issued on Dec 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Tristram Heyward Dashti-Gibson, LCMHC located?

The NPPES record lists a practice address at 539 Islington St Ste 4, Portsmouth, NH, 03801. Phone: (603) 689-7890. Providers update this record themselves, so call before visiting.

How can I verify Tristram Heyward Dashti-Gibson, LCMHC's license?

NPPES lists New Hampshire license number 993, as entered by the provider. Search the New Hampshire board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.