Samantha Chan
Physician Assistant · Waltham, MA
Samantha Chan is a physician assistant with a practice address in Waltham, Massachusetts, and NPI 1801488762, issued on Feb 10, 2021. Check the license (Massachusetts PA8574, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Samantha Chan
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA8574 MA
Self-reported in NPPES; status is on the state search - Practice location
- 840 Winter Street, Waltham, MA 02451
- Phone
- (617) 738-8642
- Enumerated
- Feb 10, 2021
- Record last updated
- Apr 26, 2022
- Medicare enrollment
- Enrolled (PECOS I20220412002793); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Also registered at 840 Winter Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel MascarenhasOrthopaedic Surgery Physician1689170151
- Alexandra Wolfe, PA-CPhysician Assistant1003499955
Verify Samantha Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA8574Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average physician assistant in 2024
102 Medicare Part D claims for 69 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 39 claims were for opioids.
Most prescribed
- Meloxicam27 claims
- Oxycodone Hcl26 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $774.91
7 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Boston Orthopaedic And Spine LLCBrighton, MA
- Select Rehabilitation, LLCGlenview, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Samantha Chan among 4,713 physician assistant records in Massachusetts
Samantha Chan 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 2021, is newer than 63% of them.
- NPI issued2021 · 63% of these records are older, 32% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2021 · median 2019 among the 3,217 with a school on file
- Record last updated2022 · 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).
23 physician assistant records list a practice address in Waltham
They are 23 of the 2,111 NPPES records with a practice address in Waltham, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Waltham → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Rebecca Blake, PA-CWaltham, MA 024511043700214
- Irene Ghobrial, PA-CWaltham, MA 024511639261290
- Timothy Grinnell, PA-CWaltham, MA 024511790828119
- Elizabeth Kirstein, PAWaltham, MA 024511689634842
- Kiet Le, PAWaltham, MA 024511992190748
- Thomas Pacheco, PAWaltham, MA 024511780654491
- Jason Rand, PAWaltham, MA 024511417937137
- Sarah Rice, PAWaltham, MA 024511396147856
Common questions
What is Samantha Chan's NPI number?
Samantha Chan's National Provider Identifier (NPI) is 1801488762, issued on Feb 10, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Samantha Chan located?
The NPPES record lists a practice address at 840 Winter Street, Waltham, MA, 02451. Phone: (617) 738-8642. Providers update this record themselves, so call before visiting.
How can I verify Samantha Chan's license?
NPPES lists Massachusetts license number PA8574, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Samantha Chan prescribe under Medicare Part D?
In 2024, Samantha Chan had 102 Medicare Part D claims for 69 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions 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.