Matthew Y. Siu, MD
Family Medicine Physician · Malden, MA
Matthew Y. Siu, MD is a family medicine physician with a practice address in Malden, Massachusetts, and NPI 1467441816, issued on Oct 18, 2005. Check the license (Massachusetts 78886, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Matthew Y. Siu
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 78886 MA
Self-reported in NPPES; status is on the state search - Practice location
- 578 Main St, Malden, MA 02148
- Phone
- (781) 321-3422
- Enumerated
- Oct 18, 2005
- Record last updated
- Feb 24, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (781) 321-1863
- Medicaid ID
- 3129080 MA
- Medicare enrollment
- Enrolled (PECOS I20040330000637); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,265 in Massachusetts → Look up another NPI →
Also registered at 578 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Helena Pham, CNPNurse Practitioner1134876139
- Jennifer Powell, D.O.Family Medicine Physician1942648639
Verify Matthew Y. Siu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 78886Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% more Medicare Part D claims than the average family medicine physician in 2024
6,886 Medicare Part D claims for 460 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 195 claims were for opioids.
Most prescribed
- Atorvastatin Calcium688 claims
- Amlodipine Besylate417 claims
- Losartan Potassium289 claims
- Simvastatin260 claims
- Lisinopril251 claims
- Metformin Hcl Er197 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.
Bills Medicare through one group practice
- Hallmark Health Medical Associates IncRevere, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew Y. Siu among 2,265 family medicine physician records in Massachusetts
Matthew Y. Siu, MD is one of 2,265 family medicine physician records with a practice address in Massachusetts. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1972 · median 2006 among the 1,529 with a school on file
- Record last updated2015 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
60 family medicine physician records list a practice address in Malden
They are 60 of the 1,065 NPPES records with a practice address in Malden, and 2,265 family medicine physician records in Massachusetts.
All 2,265 in Massachusetts → Every provider in Malden → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lissette Bouret, MDMalden, MA 021481649373580
- Molly Cohen-Osher, MDMalden, MA 021481073550711
- Caitlin D'Agata, MDMalden, MA 021481689808487
- Latoya Etheridge, M.D.Malden, MA 021481972762821
- Andrea Gordon, MDMalden, MA 021481811986292
- Honor Macnaughton, M.D.Malden, MA 021481619170032
- Nicolas Nguyen, M.D.Malden, MA 021481588856926
- Amiesha Panchal, MDMalden, MA 021481568679843
Common questions
What is Matthew Y. Siu, MD's NPI number?
Matthew Y. Siu, MD's National Provider Identifier (NPI) is 1467441816, issued on Oct 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Y. Siu, MD located?
The NPPES record lists a practice address at 578 Main St, Malden, MA, 02148. Phone: (781) 321-3422. Providers update this record themselves, so call before visiting.
How can I verify Matthew Y. Siu, MD's license?
NPPES lists Massachusetts license number 78886, 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.
How much does Matthew Y. Siu, MD prescribe under Medicare Part D?
In 2024, Matthew Y. Siu, MD had 6,886 Medicare Part D claims for 460 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.