Jason P. Block, MD
Internal Medicine Physician · Boston, MA
Jason P. Block, MD is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1801823620, issued on Jun 27, 2006. Check the license (Massachusetts 226439, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Jason P. Block
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 226439 MA
Self-reported in NPPES; status is on the state search - Practice location
- 75 Francis Street, Boston, MA 02115
- Phone
- (617) 732-6049
- Enumerated
- Jun 27, 2006
- Record last updated
- Jun 19, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (617) 264-5202
- Medicare enrollment
- Enrolled (PECOS I20061212000425); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 75 Francis Street
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Verify Jason P. Block in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 226439Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,422 Medicare Part D claims for 98 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 77 claims were for opioids.
Most prescribed
- Atorvastatin Calcium118 claims
- Amlodipine Besylate82 claims
- Omeprazole53 claims
- Losartan Potassium43 claims
- Gabapentin42 claims
- Lisinopril37 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
- Brigham And Womens Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason P. Block among 6,825 internal medicine physician records in Massachusetts
Jason P. Block, MD 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 fileYes · 60% of these records are
- Graduated2003 · median 2004 among the 4,103 with a school on file
- Record last updated2012 · 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).
2,320 internal medicine physician records list a practice address in Boston
They are 2,320 of the 41,865 NPPES records with a practice address in Boston, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Boston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Marcy Carty, MD, MPHBoston, MA 021151326038928
- Peter Doyle, M.D.Boston, MA 021151770573487
- Pracha Eamranond, M.D.Boston, MA 021151073501656
- Mark Friedberg, M.D.Boston, MA 021151437149184
- Jaye Hefner, MDBoston, MA 021151053384867
- Allen Kachalia, MD JDBoston, MA 021151346231982
- Daniel Kuritzkes, MDBoston, MA 021151114917416
- Sylvia McKean, MDBoston, MA 021151316938954
Common questions
What is Jason P. Block, MD's NPI number?
Jason P. Block, MD's National Provider Identifier (NPI) is 1801823620, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jason P. Block, MD located?
The NPPES record lists a practice address at 75 Francis Street, Boston, MA, 02115. Phone: (617) 732-6049. Providers update this record themselves, so call before visiting.
How can I verify Jason P. Block, MD's license?
NPPES lists Massachusetts license number 226439, 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 Jason P. Block, MD prescribe under Medicare Part D?
In 2024, Jason P. Block, MD had 1,422 Medicare Part D claims for 98 beneficiaries; 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.