Joshua Kalter, M.D.
Internal Medicine Physician · Westfield, MA
Joshua Kalter, M.D. is an internal medicine physician with a practice address in Westfield, Massachusetts, and NPI 1669534921, issued on Dec 14, 2006. Check the license (Massachusetts 40968, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Joshua Kalter
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 40968 MA
Self-reported in NPPES; status is on the state search - Practice location
- 56 Court St, Westfield, MA 01085
- Phone
- (413) 562-2099
- Enumerated
- Dec 14, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (413) 562-8369
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Joshua Kalter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 40968Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
28 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Joshua Kalter among 6,825 internal medicine physician records in Massachusetts
Joshua Kalter, M.D. is one of 6,825 internal medicine 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 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2007 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 internal medicine physician records list a practice address in Westfield
They are 23 of the 910 NPPES records with a practice address in Westfield, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Westfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michelle Barnett, MDWestfield, MA 010851538127048
- Bashir Bashiruddin, MDWestfield, MA 010851578513222
- Roger Beneitone, MDWestfield, MA 010851760452635
- Laura Gioiella, MDWestfield, MA 010851609864933
- Gurpal Kingra, MDWestfield, MA 010851538199880
- Charlotte Miller, M.D.Westfield, MA 010851346272861
- Thomas Percy, MDWestfield, MA 010851699709352
- David Peterson, MDWestfield, MA 010851619918752
Common questions
What is Joshua Kalter, M.D.'s NPI number?
Joshua Kalter, M.D.'s National Provider Identifier (NPI) is 1669534921, issued on Dec 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joshua Kalter, M.D. located?
The NPPES record lists a practice address at 56 Court St, Westfield, MA, 01085. Phone: (413) 562-2099. Providers update this record themselves, so call before visiting.
How can I verify Joshua Kalter, M.D.'s license?
NPPES lists Massachusetts license number 40968, 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 Joshua Kalter, M.D. prescribe under Medicare Part D?
In 2024, Joshua Kalter, M.D. had 28 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.