Catherine Kelso Sadowski, PA-C
Physician Assistant · Boston, MA
Catherine Kelso Sadowski, PA-C is a physician assistant with a practice address in Boston, Massachusetts, and NPI 1477525418, issued on Feb 3, 2006. Check the license (Massachusetts PA4295, as entered in NPPES) with the Massachusetts board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Catherine Kelso Sadowski
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA4295 MA
Self-reported in NPPES; status is on the state search - Practice location
- 780 Albany Street, Boston, MA 02118
- Phone
- (857) 654-1000
- Enumerated
- Feb 3, 2006
- Record last updated
- Nov 3, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (857) 654-1100
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Also registered at 780 Albany Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Catherine Kelso Sadowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA4295Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Catherine Kelso Sadowski among 4,713 physician assistant records in Massachusetts
Catherine Kelso Sadowski, 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 not. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileNo · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2014 · 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).
1,660 physician assistant records list a practice address in Boston
They are 1,660 of the 41,865 NPPES records with a practice address in Boston, and 4,713 physician assistant records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 4,713 in Massachusetts → Every provider in Boston → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Susan Bowler, PA-CBoston, MA 021181295812048
- Jennifer Czarniak, PABoston, MA 021181528050259
- Sandy Falcon, PA-CBoston, MA 021181275619033
- Barbara Furgal, PA-CBoston, MA 021181568556454
- Eric Haas, PABoston, MA 021181144312174
- Cynthia Kiang, PA-CBoston, MA 021181811974116
- Nina Lev, P.A.Boston, MA 021181568421923
- Elizabeth Marks, PA-CBoston, MA 021181396761169
Common questions
What is Catherine Kelso Sadowski, PA-C's NPI number?
Catherine Kelso Sadowski, PA-C's National Provider Identifier (NPI) is 1477525418, issued on Feb 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Kelso Sadowski, PA-C located?
The NPPES record lists a practice address at 780 Albany Street, Boston, MA, 02118. Phone: (857) 654-1000. Providers update this record themselves, so call before visiting.
How can I verify Catherine Kelso Sadowski, PA-C's license?
NPPES lists Massachusetts license number PA4295, 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. 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.