Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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David Marshall, LICSW

Individual provider Clinical Social Worker · NPI 1619208022

David Marshall, LICSW is a Clinical Social Worker in Amherst, New Hampshire. Qualified in 2008, 18 years ago. Practices with Derry Medical Center, PA, a 98-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in New Hampshire.

Years since qualifying
18
Licensed in
NH
In the registry since
2010
What do these letters mean?
LICSW — Licensed Independent Clinical Social Worker
The title some states use for an independently practising clinical social worker.

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Practice location Address checks out

9 Lyndeborough Rd
Amherst, NH 03031-3040
Phone: (603) 736-7420
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 14a Tsienneto Rd, Derry, NH 03038-1505 — (603) 537-1300

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 1699 (NH)

Record details

NPI number1619208022
Entity typeIndividual (Type 1)
GenderMale
Credentials LICSW
Sole proprietorYes
NPI enumeratedJanuary 25, 2010
Last updated in NPPESMarch 22, 2024
Certification dateMarch 22, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Derry Medical Center, Pa — 98 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients11
Services billed 118 a service is one billed item, such as a visit, a test or a procedure
Average patient age67

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Derry Medical Center, PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 98 clinicians in the practice; 12 are shown here.

Other providers in Amherst