NPPES file of Aug 9, 2026

Katie Williamson, MSPT

Physical Therapist · South Weymouth, MA

Katie Williamson, MSPT is a physical therapist with a practice address in South Weymouth, Massachusetts, and NPI 1235122276, issued on Aug 24, 2005. Check the license (Massachusetts 16540, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235122276
Name
Katie Williamson
Credential
MSPT
Primary taxonomy
Physical Therapist 225100000X
License number
16540 MA
Self-reported in NPPES; status is on the state search
Practice location
541 Main St, South Weymouth, MA 02190
Phone
(781) 331-9600
Enumerated
Aug 24, 2005
Record last updated
Jul 13, 2026
Medicare enrollment
Enrolled (PECOS I20040315000747); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest physical therapist records → All 7,100 in Massachusetts → Look up another NPI →

Also registered at 541 Main St

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

  1. Dana AnstettMental Health Counselor1770857286
  2. Tara Armstrong, PA-CMedical Physician Assistant1811049414
  3. Richard Ashburn, MDPulmonary Disease Physician1861492746
  4. John Casey, D.C.Chiropractor1700805181
  5. Charles Chalko, D.O.Internal Medicine Physician1548218126
  6. Jeanne Colton, NPNurse Practitioner1992782072

Verify Katie Williamson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license 16540    Check 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 Massachusetts 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.

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Bills Medicare through one group practice

  1. Center For Orthopedic Rehabilitation IncWeymouth, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Katie Williamson among 7,100 physical therapist records in Massachusetts

Katie Williamson, MSPT is one of 7,100 physical therapist records with a practice address in Massachusetts. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 97% newer
  • In a Medicare fileYes · 31% of these records are
  • In the CMS Doctors and Clinicians fileYes · 33% of these records are
  • Graduated2003 · median 2017 among the 2,371 with a school on file
  • Record last updated2026 · 66% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 225100000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

9 physical therapist records list a practice address in South Weymouth

They are 9 of the 445 NPPES records with a practice address in South Weymouth, and 7,100 physical therapist records in Massachusetts.

All 7,100 in Massachusetts → Every provider in South Weymouth → Physical Therapist nationwide →

The 8 physical therapist records with the nearest ZIP codes

  1. Andrew Asztalos, PT, DPTWeymouth, MA 021901225419708
  2. Debra Bright, MSPT, ATPWeymouth, MA 021901588082879
  3. Anna Burns, PTWeymouth, MA 021901659680437
  4. Nancy Demattia, MSPTSouth Weymouth, MA 021901104819275
  5. Peter Droste, PTWeymouth, MA 021901871622233
  6. Stephen Gulczynski, PHYSICAL THERAPISTSouth Weymouth, MA 021901487647533
  7. Gary Kimball, PT, OCSSouth Weymouth, MA 021901033102199
  8. Neil McDermott, PT, OCSSouth Weymouth, MA 021901649263674

Common questions

What is Katie Williamson, MSPT's NPI number?

Katie Williamson, MSPT's National Provider Identifier (NPI) is 1235122276, issued on Aug 24, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Katie Williamson, MSPT located?

The NPPES record lists a practice address at 541 Main St, South Weymouth, MA, 02190. Phone: (781) 331-9600. Providers update this record themselves, so call before visiting.

How can I verify Katie Williamson, MSPT's license?

NPPES lists Massachusetts license number 16540, as entered by the provider. Search the Massachusetts 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.