Alexander Donald Pyden, MD
Anatomic Pathology & Clinical Pathology Physician · Burlington, MA
Alexander Donald Pyden, MD is an anatomic pathology & clinical pathology physician with a practice address in Burlington, Massachusetts, and NPI 1548650971, issued on Jan 22, 2015. Check the license (Massachusetts 286257, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Alexander Donald Pyden
- Credential
- MD
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- 286257 MA
Self-reported in NPPES; status is on the state search - Practice location
- 41 Mall Road Lahey Hospital And Medical Center, Burlington, MA 01805
- Phone
- (781) 744-8000
- Enumerated
- Jan 22, 2015
- Record last updated
- Jun 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210618001534); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2016
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 542 in Massachusetts → Look up another NPI →
Also registered at 41 Mall Road Lahey Hospital And Medical Center
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kaitlin Spiegel, PA-C, RD, LDNPhysician Assistant1881081719
Verify Alexander Donald Pyden in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 286257Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 91.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Lahey Clinic IncBurlington, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander Donald Pyden among 542 anatomic pathology & clinical pathology physician records in Massachusetts
Alexander Donald Pyden, MD is one of 542 anatomic pathology & clinical pathology physician records with a practice address in Massachusetts. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 73% of them.
- NPI issued2015 · 73% of these records are older, 23% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2016 · median 2004 among the 305 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in Massachusetts
There are 542 anatomic pathology & clinical pathology physician records in Massachusetts.
All 542 in Massachusetts → Every provider in Burlington → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Namrata Anand, M.DBurlington, MA 018051659436442
- Charles Arkin, MDBurlington, MA 018051538260674
- Kuei Kwun Greg Chang, M.D.Burlington, MA 018051790842748
- Irina Dubinchik, MDBurlington, MA 018051013984152
- John Dugan, M.D.Burlington, MA 018051568473353
- Sherry Emery, M.D.Burlington, MA 018051598714883
- Thomas Gage, MDBurlington, MA 018051497907109
- Atoussa Goldar-Najafi, MDBurlington, MA 018051558424655
Common questions
What is Alexander Donald Pyden, MD's NPI number?
Alexander Donald Pyden, MD's National Provider Identifier (NPI) is 1548650971, issued on Jan 22, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Donald Pyden, MD located?
The NPPES record lists a practice address at 41 Mall Road Lahey Hospital And Medical Center, Burlington, MA, 01805. Phone: (781) 744-8000. Providers update this record themselves, so call before visiting.
How can I verify Alexander Donald Pyden, MD's license?
NPPES lists Massachusetts license number 286257, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Alexander Donald Pyden, MD's MIPS final score?
The 2023 MIPS final score is 91.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.