Ariel Siegel
Hematology (Internal Medicine) Physician · Boston, MA
Ariel Siegel is a hematology (internal medicine) physician with a practice address in Boston, Massachusetts, and NPI 1588227326, issued on Apr 17, 2019. Check the license (Massachusetts 1026536, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Ariel Siegel
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- 1026536 MA
Self-reported in NPPES; status is on the state search - Practice location
- 450 Brookline Ave, Boston, MA 02215
- Phone
- (617) 632-2832
- Enumerated
- Apr 17, 2019
- Record last updated
- Jul 20, 2026
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 117 in Massachusetts → Look up another NPI →
Also registered at 450 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Abel, MDHematology & Oncology Physician1285611954
- Lara Abousamra, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1851183404
- Karley Adams, PAPhysician Assistant1578261764
- Lauren Adams, PA-CPhysician Assistant1902763469
- Ana Aguilar-Bonilla, M.D.Pediatric Hematology & Oncology Physician1023319761
- Andrew Aguirre, MD, PHDMedical Oncology Physician1609071208
Verify Ariel 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 1026536Check 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 practice group's MIPS final score for 2023 (Medicare payment program): 84.5 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).
Industry payments in 2024: $385.22
6 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 721 providers of this specialty with any payment received $13,778.35 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.
Ariel Siegel among 117 hematology (internal medicine) physician records in Massachusetts
Ariel Siegel is one of 117 hematology (internal medicine) physician records with a practice address in Massachusetts. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 88% of them.
- NPI issued2019 · 88% of these records are older, 4% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2026 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology (Internal Medicine) Physician providers in Massachusetts
There are 117 hematology (internal medicine) physician records in Massachusetts.
All 117 in Massachusetts → Every provider in Boston → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Joseph Antin, MDBoston, MA 022151861469249
- Nancy Berliner, MDBoston, MA 022151609855576
- Jorge Castillo, MDBoston, MA 022151689891129
- Joan Goldberg, MDBoston, MA 022151568558039
- Monique Hartley-Brown, M.D.Boston, MA 022151992904387
- Robin Marie Joyce, M.D.Boston, MA 022151659318350
- John Koreth, MBBS DPHILBoston, MA 022151396706503
- James Levine, M.D.Boston, MA 022151275573701
Common questions
What is Ariel Siegel's NPI number?
Ariel Siegel's National Provider Identifier (NPI) is 1588227326, issued on Apr 17, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Ariel Siegel located?
The NPPES record lists a practice address at 450 Brookline Ave, Boston, MA, 02215. Phone: (617) 632-2832. Providers update this record themselves, so call before visiting.
How can I verify Ariel Siegel's license?
NPPES lists Massachusetts license number 1026536, 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 Ariel Siegel's MIPS final score?
The 2023 MIPS final score is 84.5 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.