Eric Victor Granowitz, MD
Infectious Disease Physician · Northampton, MA
Eric Victor Granowitz, MD is an infectious disease physician with a practice address in Northampton, Massachusetts, and NPI 1801855242, issued on Mar 23, 2006. Check the license (Massachusetts 71462, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Eric Victor Granowitz
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 71462 MA
Self-reported in NPPES; status is on the state search - Practice location
- 22 Atwood Dr, Northampton, MA 01060
- Phone
- (413) 582-9186
- Enumerated
- Mar 23, 2006
- Record last updated
- Feb 15, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (413) 923-9317
- Medicare enrollment
- Enrolled (PECOS I20050527000149); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 487 in Massachusetts → Look up another NPI →
Also registered at 22 Atwood Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Peter Halperin, MDPsychiatry Physician1992736482
- Dhruv Jani, DOGeriatric Medicine (Family Medicine) Physician1891355293
- VI Vien Khoo, RDNRegistered Dietitian1326974684
Verify Eric Victor Granowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 71462Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average infectious disease physician in 2024
371 Medicare Part D claims for 39 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 49% of claims.
Most prescribed
- Biktarvy84 claims
- Odefsey29 claims
- Darunavir21 claims
- Sulfamethoxazole-Trimethoprim21 claims
- Amoxicillin17 claims
- Efavirenz-Emtric-Tenofov Disop17 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
- Mass General Brigham Medical Group Western Massachusetts IncNorthampton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eric Victor Granowitz among 487 infectious disease physician records in Massachusetts
Eric Victor Granowitz, MD is one of 487 infectious disease physician records with a practice address in Massachusetts. 69% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 47% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1985 · median 2003 among the 296 with a school on file
- Record last updated2019 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Massachusetts
There are 487 infectious disease physician records in Massachusetts.
All 487 in Massachusetts → Every provider in Northampton → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- William Swiggard, M.D., PH.D.Northampton, MA 010601457335622
- James Greenman, MDFlorence, MA 010621811989635
- Joanne Levin, M.D.Florence, MA 010621134110687
- Amelia Jaworek Burgess, M.D.Palmer, MA 010691518984947
- Douglas Salvador, MDHolyoke, MA 010401568434512
- Robert Hoffman, M.D.Springfield, MA 011041497756092
- Aleena Zia, MDSpringfield, MA 011041245752328
- Claudia Martorell, MDSpringfield, MA 011051609834662
Common questions
What is Eric Victor Granowitz, MD's NPI number?
Eric Victor Granowitz, MD's National Provider Identifier (NPI) is 1801855242, issued on Mar 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Eric Victor Granowitz, MD located?
The NPPES record lists a practice address at 22 Atwood Dr, Northampton, MA, 01060. Phone: (413) 582-9186. Providers update this record themselves, so call before visiting.
How can I verify Eric Victor Granowitz, MD's license?
NPPES lists Massachusetts license number 71462, 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 Eric Victor Granowitz, MD prescribe under Medicare Part D?
In 2024, Eric Victor Granowitz, MD had 371 Medicare Part D claims for 39 beneficiaries; the average among infectious disease physician prescribers was 689. 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.