Matthew S. Horsfield, MD
Family Medicine Physician · Worcester, MA
Matthew S. Horsfield, MD is a family medicine physician with a practice address in Worcester, Massachusetts, and NPI 1013998129, issued on Nov 7, 2005. Check the license (Massachusetts 1015693, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Matthew S. Horsfield
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 1015693 MA
12242R LA
18082 SC
M5232 TX
Self-reported in NPPES; status is on the state search - Practice location
- 5 Neponset St, Worcester, MA 01606
- Phone
- (508) 425-5566
- Enumerated
- Nov 7, 2005
- Record last updated
- May 20, 2024
- Fax
- (508) 365-6590
- Medicare enrollment
- Enrolled (PECOS I20231023000820); accepts Medicare assignment
- Medical or professional school
- University Of South Florida College Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,265 in Massachusetts → Look up another NPI →
Also registered at 5 Neponset St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sheila Abdallah, MDFamily Medicine Physician1821356312
- Caroline Anastasi, LMHCMental Health Counselor1881140788
- Nicole Barr, NPFamily Nurse Practitioner1700524873
- Kern Bayard, MDInternal Medicine Physician1699777888
- Wendy Bergman, MDInternal Medicine Physician1083674451
- Irene Blair, NPNurse Practitioner1558337824
Verify Matthew S. Horsfield in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1015693Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average family medicine physician in 2024
2,878 Medicare Part D claims for 370 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 143 claims were for opioids.
Most prescribed
- Atorvastatin Calcium256 claims
- Amlodipine Besylate146 claims
- Lisinopril146 claims
- Omeprazole89 claims
- Tamsulosin Hcl89 claims
- Albuterol Sulfate Hfa75 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.
The MIPS final score for 2023 (Medicare payment program): 91.3 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
- Reliant Medical Group IncWorcesteer, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew S. Horsfield among 2,265 family medicine physician records in Massachusetts
Matthew S. Horsfield, 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
- Graduated1994 · median 2006 among the 1,529 with a school on file
- Record last updated2024 · 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).
168 family medicine physician records list a practice address in Worcester
They are 168 of the 13,166 NPPES records with a practice address in Worcester, and 2,265 family medicine physician records in Massachusetts.
All 2,265 in Massachusetts → Every provider in Worcester → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Sheila Abdallah, MDWorcester, MA 016061821356312
- David Gilchrist, M.D.Worcester, MA 016061952452989
- Suhayla Islam, DOWorcester, MA 016061437899929
- Ye Li, M.D.Worcester, MA 016061396013215
- Amanda Pelosi, RNWorcester, MA 016061245106996
- Lisetta Shah, M.D.Worcester, MA 016061205221900
- Jonathan Smith, DOWorcester, MA 016061447991799
- Redwan Ahmed, MDWorcester, MA 016051356830103
Common questions
What is Matthew S. Horsfield, MD's NPI number?
Matthew S. Horsfield, MD's National Provider Identifier (NPI) is 1013998129, issued on Nov 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Matthew S. Horsfield, MD located?
The NPPES record lists a practice address at 5 Neponset St, Worcester, MA, 01606. Phone: (508) 425-5566. Providers update this record themselves, so call before visiting.
How can I verify Matthew S. Horsfield, MD's license?
NPPES lists Massachusetts license number 1015693, 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 S. Horsfield, MD prescribe under Medicare Part D?
In 2024, Matthew S. Horsfield, MD had 2,878 Medicare Part D claims for 370 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Matthew S. Horsfield, MD's MIPS final score?
The 2023 MIPS final score is 91.3 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.