Registry data as of Aug 27, 2026

John Callahan, PTA/COTA

Occupational Therapy Assistant · Concord, NH

John Callahan, PTA/COTA is an occupational therapy assistant with a practice address in Concord, New Hampshire, and NPI 1750689303, issued on Mar 7, 2011. Check the license with the New Hampshire board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1750689303
Name
John Callahan
Credential
PTA/COTA
Primary taxonomy
Occupational Therapy Assistant 224Z00000X
Practice location
20 Maitland St, Concord, NH 03301
Phone
(603) 485-8743
Enumerated
Mar 7, 2011
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 20 Maitland St

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

  1. Kristin ArmstrongOccupational Therapist1073632790
  2. Amy Bartlett, P.T.A.Physical Therapy Assistant1790007474
  3. Ami Faria, PT, DPTPhysical Therapist1750414587
  4. Madison FrarieCase Manager/Care Coordinator1881186021
  5. Laura Gamache, COTAOccupational Therapy Assistant1306964275
  6. Jennifer Guadagno, PT, DPTPhysical Therapist1346562030

Verify John Callahan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New Hampshire board licenses this professionCheck 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.

Occupational Therapy Assistant providers in New Hampshire

There are 273 occupational therapy assistant records in New Hampshire. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 273 in New Hampshire → Every provider in Concord →

Other occupational therapy assistant records in New Hampshire

  1. Kathleen Ahearn, OTAWolfeboro, NH1477907004
  2. Alicia Aho, COTA/LNashua, NH1922586924
  3. Kimberly AllsupBoscawen, NH1346782232
  4. Sacha Anastasio, COTALaconia, NH1609469196
  5. Eileen Anderson, COTADover, NH1609023142
  6. Margaret Anderson, COTANashua, NH1194970772
  7. Michelle Anderson, COTAMerrimack, NH1598379703
  8. Wendy AndersonSalem, NH1215295399
  9. Eva ArsenaultMilford, NH1164818415
  10. Ruth Ashley, COTA/LSomersworth, NH1598386310

Common questions

What is John Callahan, PTA/COTA's NPI number?

John Callahan, PTA/COTA's National Provider Identifier (NPI) is 1750689303, issued on Mar 7, 2011. An NPI identifies a provider in billing; it is not a license.

Where is John Callahan, PTA/COTA located?

The NPPES record lists a practice address at 20 Maitland St, Concord, NH, 03301. Phone: (603) 485-8743. Providers update this record themselves, so call before visiting.

How can I verify John Callahan, PTA/COTA's license?

Search the New Hampshire board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.