Ashish Mahajan, M.D.
Nephrology Physician · Boston, MA
Ashish Mahajan, M.D. is a nephrology physician with a practice address in Boston, Massachusetts, and NPI 1497974539, issued on Apr 25, 2007. Check the license (Massachusetts 222613, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Ashish Mahajan
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 222613 MA
Self-reported in NPPES; status is on the state search - Practice location
- Tufts New England Medical Center, Boston, MA 02111
- Phone
- (617) 636-9606
- Enumerated
- Apr 25, 2007
- Record last updated
- Aug 18, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070912000421); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at Tufts New England Medical Center
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisa Banta, M.D.Anesthesiology Physician1669560595
- Robert Blanton, M.D.Cardiovascular Disease Physician1013935436
- Andrew Levey, M.D.Nephrology Physician1902830664
- Charles Moore, M.D.Child & Adolescent Psychiatry Physician1861408460
Verify Ashish Mahajan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 222613Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average nephrology physician in 2024
1,504 Medicare Part D claims for 254 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Lisinopril157 claims
- Amlodipine Besylate144 claims
- Losartan Potassium141 claims
- Furosemide86 claims
- Lokelma84 claims
- Labetalol Hcl64 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.
The MIPS final score for 2023 (Medicare payment program): 17.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Nephrology Asssociates OF The Merrimack Valley PCTewksbury, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Massachusetts
There are 417 nephrology physician records in Massachusetts.
Other nephrology physician records in Massachusetts
- Amtul Aala, MDBoston, MA1174946347
- Reza Abdi, MDBoston, MA1356359368
- Marat Abdullin, M.D.Springfield, MA1619159712
- Vivian AbernethyBoston, MA1710960232
- Rekha Abichandani, M.D.Cambridge, MA1912033598
- Konstantin Abramov, M.D.Worcester, MA1992854707
- Krishna Agarwal, M.B.B.S.Springfield, MA1477916120
- Nikhil AgrawalBoston, MA1467722579
- Ayman Al Jurdi, M.D.Boston, MA1043690332
- Laith Al Rabadi, M.D.Boston, MA1821309188
Common questions
What is Ashish Mahajan, M.D.'s NPI number?
Ashish Mahajan, M.D.'s National Provider Identifier (NPI) is 1497974539, issued on Apr 25, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ashish Mahajan, M.D. located?
The NPPES record lists a practice address at Tufts New England Medical Center, Boston, MA, 02111. Phone: (617) 636-9606. Providers update this record themselves, so call before visiting.
How can I verify Ashish Mahajan, M.D.'s license?
NPPES lists Massachusetts license number 222613, 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 Ashish Mahajan, M.D. prescribe under Medicare Part D?
In 2024, Ashish Mahajan, M.D. had 1,504 Medicare Part D claims for 254 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Ashish Mahajan, M.D.'s MIPS final score?
The 2023 MIPS final score is 17.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.