What is David Marshall's NPI number?

David Marshall's National Provider Identifier (NPI) is 1619208022, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is David Marshall's specialty?

David Marshall is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).

Where is David Marshall located?

David Marshall's practice location on file with NPPES is 9 Lyndeborough Rd, Amherst, NH 03031-3040.

What is David Marshall's phone number?

The practice phone number listed in the NPPES registry for David Marshall is (603) 736-7420.

Does David Marshall accept Medicare?

David Marshall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is David Marshall's NPI active?

Yes — David Marshall's NPI (1619208022) is active in the NPPES registry as of the last update on 2024-03-22.

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David Marshall, LICSW

NPI 1619208022 · Clinical Social Worker · Amherst, NH

David Marshall, LICSW is a Clinical Social Worker provider in Amherst, NH (NPI 1619208022).

Provider details

NPI number: 1619208022
Entity type: Individual
Primary specialty: Clinical Social WorkerBehavioral Health & Social Service Providers
Credential: LICSW
Sex: Male
Sole proprietor: Yes
License: 1699 (NH)

Practice location

9 Lyndeborough Rd

Amherst, NH 03031-3040

Phone: (603) 736-7420

Street-level locationGet directions

More NH providers

Mailing address

9 Lyndeborough Rd

Amherst, NH 03031-3040

Specialties & taxonomies

Clinical Social WorkerPrimary1041C0700XLicense 1699 (NH)
Behavioral Health & Social Service Providers

Additional practice locations (1)

14a Tsienneto Rd
Derry, NH 03038-1505
Phone: (603) 537-1300

Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(89/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
16 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
2 documented practice locations

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Enumerated: 2010-01-25
Last updated: 2024-03-22
Certified: 2024-03-22

Frequently asked questions

What is David Marshall's NPI number?: David Marshall's National Provider Identifier (NPI) is 1619208022, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is David Marshall's specialty?: David Marshall is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
Where is David Marshall located?: David Marshall's practice location on file with NPPES is 9 Lyndeborough Rd, Amherst, NH 03031-3040.
What is David Marshall's phone number?: The practice phone number listed in the NPPES registry for David Marshall is (603) 736-7420.
Does David Marshall accept Medicare?: David Marshall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is David Marshall's NPI active?: Yes — David Marshall's NPI (1619208022) is active in the NPPES registry as of the last update on 2024-03-22.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Additional practice locations (1)

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Additional practice locations (1)

Profile Score

Frequently asked questions