Ashish Mahajan, M.D.
NPI 1497974539 · Nephrology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ashish Mahajan, M.D. is a Nephrology Physician provider in Boston, MA (NPI 1497974539).
Provider details
- NPI number
- 1497974539
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 222613 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,393 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 548 | $82 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 224 | $139 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 159 | $373 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 101 | $136 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 88 | $99 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 157 | 39 |
| Amlodipine Besylate | 144 | 46 |
| Losartan Potassium | 141 | 36 |
| Furosemide | 86 | 26 |
| Sodium Zirconium Cyclosilicatebrand: Lokelma | 84 | 13 |
| Labetalol Hcl | 64 | 19 |
| Hydralazine Hcl | 60 | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-25
- Last updated
- 2010-08-18
Frequently asked questions
- What is Ashish Mahajan's NPI number?
- Ashish Mahajan's National Provider Identifier (NPI) is 1497974539, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ashish Mahajan's specialty?
- Ashish Mahajan is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Ashish Mahajan located?
- Ashish Mahajan's practice location on file with NPPES is Tufts New England Medical Center, Boston, MA 02111.
- What is Ashish Mahajan's phone number?
- The practice phone number listed in the NPPES registry for Ashish Mahajan is (617) 636-9606.
- Does Ashish Mahajan accept Medicare?
- Ashish Mahajan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ashish Mahajan's NPI active?
- Yes — Ashish Mahajan's NPI (1497974539) is active in the NPPES registry as of the last update on 2010-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.