Eric M. Mazur, M.D.
Hematology (Internal Medicine) Physician · Norwalk, CT
Eric M. Mazur, M.D. is a hematology (internal medicine) physician with a practice address in Norwalk, Connecticut, and NPI 1881664886, issued on Jan 24, 2006. Check the license (Connecticut 021096, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Eric M. Mazur
- Credential
- M.D.
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- 021096 CT
Self-reported in NPPES; status is on the state search - Practice location
- 24 Stevens St, Norwalk, CT 06850
- Phone
- (203) 852-2368
- Enumerated
- Jan 24, 2006
- Record last updated
- Nov 9, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (203) 855-3589
- Medicaid ID
- 001210963 DE
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 21 in Connecticut → Look up another NPI →
Also registered at 24 Stevens St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Deborah August, M.D.Anatomic Pathology & Clinical Pathology Physician1801871504
- James Babashak, MDAnesthesiology Physician1932102803
- Paul Beiles, MDAnesthesiology Physician1043213978
- James Belisle, MDNeonatal-Perinatal Medicine Physician1679543136
Verify Eric M. Mazur in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 021096Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
12 Medicare Part D claims, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Eric M. Mazur among 21 hematology (internal medicine) physician records in Connecticut
Eric M. Mazur, M.D. is one of 21 hematology (internal medicine) physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 24% of them.
- NPI issued2006 · 24% of these records are older, 57% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2015 · 76% 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 Connecticut 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 Connecticut
There are 21 hematology (internal medicine) physician records in Connecticut.
All 21 in Connecticut → Every provider in Norwalk → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Francesca Montanari, MDGreenwich, CT 068301003134586
- Seyed Aleali, MDFairfield, CT 068241437146057
- Victor Chang, MDWaterbury, CT 067081760423867
- Catherine Wei, M.D.Trumbull, CT 066111902346224
- Erkut Bahceci, MDNew Haven, CT 065191043200272
- Stephanie Halene, MDNew Haven, CT 065191548356579
- Thomas Prebet, MD PHDNew Haven, CT 065111811369507
- Theodore Getz, MDNew Haven, CT 065101083241590
Common questions
What is Eric M. Mazur, M.D.'s NPI number?
Eric M. Mazur, M.D.'s National Provider Identifier (NPI) is 1881664886, issued on Jan 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Eric M. Mazur, M.D. located?
The NPPES record lists a practice address at 24 Stevens St, Norwalk, CT, 06850. Phone: (203) 852-2368. Providers update this record themselves, so call before visiting.
How can I verify Eric M. Mazur, M.D.'s license?
NPPES lists Connecticut license number 021096, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Eric M. Mazur, M.D. prescribe under Medicare Part D?
In 2024, Eric M. Mazur, M.D. had 12 Medicare Part D claims; the average among hematology (internal medicine) physician prescribers was 496. 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.