NPPES file of Aug 9, 2026

Gretchen Zalis, DPT

Physical Therapist · Somerville, MA

Gretchen Zalis, DPT is a physical therapist with a practice address in Somerville, Massachusetts, and NPI 1780400739, issued on Nov 25, 2024. Check the license (Massachusetts PTL28055, 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
1780400739
Name
Gretchen Zalis
Credential
DPT
Primary taxonomy
Physical Therapist 225100000X
License number
PTL28055 MA
Self-reported in NPPES; status is on the state search
Practice location
260 Beacon St, Somerville, MA 02143
Phone
(857) 995-6050
Enumerated
Nov 25, 2024
Record last updated
Nov 25, 2024
Fax
(857) 995-6052
Medicare enrollment
Enrolled (PECOS I20241204002915); 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 260 Beacon St

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

  1. Sara Antani, M.A., ED.MMental Health Counselor1528394160
  2. Sarah AveryAddiction (Substance Use Disorder) Counselor1538350558
  3. Floriana BicchieriLicensed Practical Nurse1356598296
  4. Johnnie Bloom, LPNLicensed Practical Nurse1659456952
  5. Timothy CaseyAddiction (Substance Use Disorder) Counselor1235251380
  6. Claire ElwynMental Health Counselor1760882492

Verify Gretchen Zalis 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 PTL28055    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. Bay State Physical Therapy OF Randolph IncNorwood, MA

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

Gretchen Zalis among 7,100 physical therapist records in Massachusetts

Gretchen Zalis, DPT 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 2024, is newer than 89% of them.

  • NPI issued2024 · 89% of these records are older, 7% newer
  • In a Medicare fileYes · 31% of these records are
  • In the CMS Doctors and Clinicians fileYes · 33% of these records are
  • Graduated2024 · median 2017 among the 2,371 with a school on file
  • Record last updated2024 · 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).

78 physical therapist records list a practice address in Somerville

They are 78 of the 1,860 NPPES records with a practice address in Somerville, and 7,100 physical therapist records in Massachusetts.

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

The 8 physical therapist records with the nearest ZIP codes

  1. Anna Duffey, DPTSomerville, MA 021431366929564
  2. Reid Fujimori, DPT, MSPTSomerville, MA 021431922202852
  3. George Giannoni, P.T.Somerville, MA 021431346288081
  4. Ellen Helinski, P.T.Somerville, MA 021431093753139
  5. Paola Jaar, DPTSomerville, MA 021431932406535
  6. Gregory Joseph, DPTSomerville, MA 021431609212992
  7. Thomas Jotkowitz, PTSomerville, MA 021431134292998
  8. Xerxes Kapadia, DPTSomerville, MA 021431992362024

Common questions

What is Gretchen Zalis, DPT's NPI number?

Gretchen Zalis, DPT's National Provider Identifier (NPI) is 1780400739, issued on Nov 25, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Gretchen Zalis, DPT located?

The NPPES record lists a practice address at 260 Beacon St, Somerville, MA, 02143. Phone: (857) 995-6050. Providers update this record themselves, so call before visiting.

How can I verify Gretchen Zalis, DPT's license?

NPPES lists Massachusetts license number PTL28055, 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.