William C. Siegel, MD
Cardiovascular Disease Physician · Brockton, MA
William C. Siegel, MD is a cardiovascular disease physician with a practice address in Brockton, Massachusetts, and NPI 1336120757, issued on Nov 11, 2005. Check the license (Massachusetts 50750, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William C. Siegel
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 50750 MA
Self-reported in NPPES; status is on the state search - Practice location
- 110 Liberty Street, Brockton, MA 02301
- Phone
- (508) 894-0400
- Enumerated
- Nov 11, 2005
- Record last updated
- Feb 16, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (508) 941-0332
- Medicaid ID
- 3073556 MA
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,080 in Massachusetts → Look up another NPI →
Also registered at 110 Liberty Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William C. Siegel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 50750Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
909 Medicare Part D claims for 341 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Metoprolol Succinate106 claims
- Eliquis96 claims
- Atorvastatin Calcium64 claims
- Amlodipine Besylate58 claims
- Rosuvastatin Calcium43 claims
- Warfarin Sodium36 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 practice group's MIPS final score for 2023 (Medicare payment program): 89.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
William C. Siegel among 1,080 cardiovascular disease physician records in Massachusetts
William C. Siegel, MD is one of 1,080 cardiovascular disease physician records with a practice address in Massachusetts. 75% 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, 83% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2021 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Massachusetts
There are 1,080 cardiovascular disease physician records in Massachusetts.
All 1,080 in Massachusetts → Every provider in Brockton → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Barry Arkin, MDBrockton, MA 023011417904202
- David Goldberg, M.D.Brockton, MA 023011053397810
- Chester Hedgepeth, MDBrockton, MA 023011063409233
- Angelos Karagiannis, MDBrockton, MA 023011932602752
- Andrew Kriegel, MDBrockton, MA 023011588680854
- Bruce Kriegel, MDBrockton, MA 023011376562447
- Gary Miller, M.D.Brockton, MA 023011942390208
- Oyere Onuma, M.D.Brockton, MA 023011760687339
Common questions
What is William C. Siegel, MD's NPI number?
William C. Siegel, MD's National Provider Identifier (NPI) is 1336120757, issued on Nov 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William C. Siegel, MD located?
The NPPES record lists a practice address at 110 Liberty Street, Brockton, MA, 02301. Phone: (508) 894-0400. Providers update this record themselves, so call before visiting.
How can I verify William C. Siegel, MD's license?
NPPES lists Massachusetts license number 50750, 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 William C. Siegel, MD prescribe under Medicare Part D?
In 2024, William C. Siegel, MD had 909 Medicare Part D claims for 341 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is William C. Siegel, MD's MIPS final score?
The 2023 MIPS final score is 89.4 of 100, reported for the practice group. 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.