Katherine Williams Duhamel, PA-C
Physician Assistant · Cambridge, MA
Katherine Williams Duhamel, PA-C is a physician assistant with a practice address in Cambridge, Massachusetts, and NPI 1497261168, issued on Dec 18, 2017. Check the license (Massachusetts PA6492, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Williams Duhamel
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA6492 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1493 Cambridge St, Cambridge, MA 02139
- Phone
- (617) 665-1000
- Enumerated
- Dec 18, 2017
- Record last updated
- Dec 3, 2025
- Medicaid ID
- 110029050A MA
- Medicare enrollment
- Enrolled (PECOS I20180608000063); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Also registered at 1493 Cambridge St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Williams Duhamel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA6492Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Milford Regional Physician Group, Inc.Milford, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Williams Duhamel among 4,713 physician assistant records in Massachusetts
Katherine Williams Duhamel, PA-C is one of 4,713 physician assistant records with a practice address in Massachusetts. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 40% of them.
- NPI issued2017 · 40% of these records are older, 55% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2018 · median 2019 among the 3,217 with a school on file
- Record last updated2025 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
99 physician assistant records list a practice address in Cambridge
They are 99 of the 5,145 NPPES records with a practice address in Cambridge, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Cambridge → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Elvira Aronzon, PA-CCambridge, MA 021391851358279
- Marita Barrett, PA-CCambridge, MA 021391801941323
- Mark Brady, PA-CCambridge, MA 021391649349994
- Allisyn Brady, PACambridge, MA 021391275686750
- Carla Dupont, PA-CCambridge, MA 021391053489096
- Catherine Faulkner, PACambridge, MA 021391811040389
- Kathleen Goreham, PA-CCambridge, MA 021391750410015
- Kenrith Plummer, PACambridge, MA 021391306867742
Common questions
What is Katherine Williams Duhamel, PA-C's NPI number?
Katherine Williams Duhamel, PA-C's National Provider Identifier (NPI) is 1497261168, issued on Dec 18, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Williams Duhamel, PA-C located?
The NPPES record lists a practice address at 1493 Cambridge St, Cambridge, MA, 02139. Phone: (617) 665-1000. Providers update this record themselves, so call before visiting.
How can I verify Katherine Williams Duhamel, PA-C's license?
NPPES lists Massachusetts license number PA6492, 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.
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.