Matthew Garthwait
Clinical Social Worker · Rye, NH
Matthew Garthwait is a clinical social worker with a practice address in Rye, New Hampshire, and NPI 1578929337, issued on Jan 11, 2016. Check the license (New Hampshire 2399, as entered in NPPES) with the New Hampshire board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Matthew Garthwait
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 2399 NH
Self-reported in NPPES; status is on the state search - Practice location
- 1245 Washington RD, Rye, NH 03870
- Phone
- (603) 969-7842
- Enumerated
- Jan 11, 2016
- Record last updated
- Jan 14, 2026
- Entity
- Type 1 · individual
Also registered at 1245 Washington RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cynthia Bear, MDGynecology Physician1033173992
- Sheri Flaherty, MSW, LICSWMental Health Counselor1629545181
- Cecelia Tarr, MSWClinical Social Worker1487133815
- Laura TrachtenbergMental Health Counselor1407798093
Verify Matthew Garthwait in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New Hampshire board licenses this profession
Search for license 2399Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4 clinical social worker records list a practice address in Rye
They are 4 of the 53 NPPES records with a practice address in Rye, and 1,592 clinical social worker records in New Hampshire. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 4 in Rye → All 1,592 in New Hampshire → Every provider in Rye →
Other clinical social worker records in New Hampshire
- Joan Abbott, LICSWConcord, NH1396223830
- Leah Abrahamsen, LICSWLebanon, NH1033580345
- John Acker, LICSWManchester, NH1851442040
- Yasmin AdamManchester, NH1205792835
- Deborah Addario, LICSWExeter, NH1205904042
- Sherry Akers, LICSWConcord, NH1457327629
- Sarah Albee, LICSWConcord, NH1285293936
- Christine Albert, MSWDover, NH1598976789
- Melissa Alder, LICSWManchester, NH1609198670
- Jon Aldrich, LICSWLebanon, NH1730227372
Common questions
What is Matthew Garthwait's NPI number?
Matthew Garthwait's National Provider Identifier (NPI) is 1578929337, issued on Jan 11, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Garthwait located?
The NPPES record lists a practice address at 1245 Washington RD, Rye, NH, 03870. Phone: (603) 969-7842. Providers update this record themselves, so call before visiting.
How can I verify Matthew Garthwait's license?
NPPES lists New Hampshire license number 2399, 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. An NPI identifies who bills; it is not a license.
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.