Isaac Kasper, MD
Rheumatology Physician · Reading, MA
Isaac Kasper, MD is a rheumatology physician with a practice address in Reading, Massachusetts, and NPI 1871889881, issued on Jun 28, 2011. Check the license (Massachusetts 270089, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Isaac Kasper
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 270089 MA
Self-reported in NPPES; status is on the state search - Practice location
- 30 New Crossing RD Ste 210, Reading, MA 01867
- Phone
- (781) 620-4892
- Enumerated
- Jun 28, 2011
- Record last updated
- Feb 18, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (781) 213-5135
- Medicare enrollment
- Enrolled (PECOS I20170602001681); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 343 in Massachusetts → Look up another NPI →
Also registered at 30 New Crossing RD Ste 210
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amy Devlin, MDRheumatology Physician1417120726
Verify Isaac Kasper in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 270089Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,082 Medicare Part D claims for 163 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Prednisone257 claims
- Hydroxychloroquine Sulfate218 claims
- Methotrexate144 claims
- Enbrel Sureclick83 claims
- Allopurinol50 claims
- Methylprednisolone46 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
- Hallmark Health Medical Associates IncRevere, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Isaac Kasper among 343 rheumatology physician records in Massachusetts
Isaac Kasper, MD is one of 343 rheumatology physician records with a practice address in Massachusetts. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 76% of them.
- NPI issued2011 · 76% of these records are older, 22% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2011 · median 2004 among the 212 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Massachusetts
There are 343 rheumatology physician records in Massachusetts.
All 343 in Massachusetts → Every provider in Reading → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Amy Devlin, MDReading, MA 018671417120726
- Joel Epstein, M.D.Westford, MA 018861750383634
- Beth Biggee, M.D.North Andover, MA 018451750346623
- Elizabeth Curtis, MDN Andover, MA 018451881798940
- Maosong Qi, M.D., PHDLawrence, MA 018431831333608
- Karen Caldwell, MD-PHDLynn, MA 019011407996481
- Deborah Collier, MDLynn, MA 019041356323661
- Khalid Syed, MDLynn, MA 019041528014289
Common questions
What is Isaac Kasper, MD's NPI number?
Isaac Kasper, MD's National Provider Identifier (NPI) is 1871889881, issued on Jun 28, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Isaac Kasper, MD located?
The NPPES record lists a practice address at 30 New Crossing RD Ste 210, Reading, MA, 01867. Phone: (781) 620-4892. Providers update this record themselves, so call before visiting.
How can I verify Isaac Kasper, MD's license?
NPPES lists Massachusetts license number 270089, 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 Isaac Kasper, MD prescribe under Medicare Part D?
In 2024, Isaac Kasper, MD had 1,082 Medicare Part D claims for 163 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.