Katherine Thonis, LCSW
Clinical Social Worker · Manchester, NH
Katherine Thonis, LCSW is a clinical social worker with a practice address in Manchester, New Hampshire, and NPI 1538207477, issued on Feb 2, 2007. Check the license (New Hampshire 1242, 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
- Katherine Thonis
- Credential
- LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 1242 NH
Self-reported in NPPES; status is on the state search - Practice location
- 250 Commercial St # 2011E, Manchester, NH 03101
- Phone
- (603) 801-5597
- Enumerated
- Feb 2, 2007
- Record last updated
- Aug 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 30423560 NH
- Medicare enrollment
- Enrolled (PECOS I20120329000714); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 1,592 in New Hampshire → Look up another NPI →
Verify Katherine Thonis 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 1242Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Katherine Thonis among 1,592 clinical social worker records in New Hampshire
Katherine Thonis, LCSW is one of 1,592 clinical social worker records with a practice address in New Hampshire. 18% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 16% of them.
- NPI issued2007 · 16% of these records are older, 69% newer
- In a Medicare fileNo · 18% of these records are
- In the CMS Doctors and Clinicians fileYes · 27% of these records are
- Graduated1999 · median 2008 among the 426 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
344 clinical social worker records list a practice address in Manchester
They are 344 of the 4,401 NPPES records with a practice address in Manchester, 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 1,592 in New Hampshire → Every provider in Manchester → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Heather Barrieau, LICSWManchester, NH 031011740270966
- Richard Cornell, LICSWManchester, NH 031011346347150
- Peter Costa, LICSWManchester, NH 031011629174313
- Nicole Duclos, LICSWManchester, NH 031011073605119
- Lisa Krygeris, LICSWManchester, NH 031011205934270
- Janice Long, LICSWManchester, NH 031011881630168
- Rene Ouellet, LICSWManchester, NH 031011336258318
- Amy Pepin, LICSWManchester, NH 031011659462703
Common questions
What is Katherine Thonis, LCSW's NPI number?
Katherine Thonis, LCSW's National Provider Identifier (NPI) is 1538207477, issued on Feb 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Thonis, LCSW located?
The NPPES record lists a practice address at 250 Commercial St # 2011E, Manchester, NH, 03101. Phone: (603) 801-5597. Providers update this record themselves, so call before visiting.
How can I verify Katherine Thonis, LCSW's license?
NPPES lists New Hampshire license number 1242, 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.