Dr. Ashish Mahajan, MD
- Medicare services, 2024
- 1,393
- Medicare patients, 2024
- 460
- Part D claims, 2024
- 1,504
- MIPS score, 2024
- 18
- Hospital affiliations
- 1
- Practice address
- 600 Clark Rd Suite 2 Suite 2, Tewksbury, MA 01876-1699
- Practice phone
- Call (978) 432-1811
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nephrology Asssociates Of The Merrimack Valley
Primary care practice · Tewksbury, Massachusetts
Find Dr. Mahajan's professional email, personal email and mobile number
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Dr. Ashish Mahajan is a nephrologist in Tewksbury, Massachusetts
Dr. Mahajan practices at Nephrology Asssociates Of The Merrimack Valley in Tewksbury, Massachusetts.
Dr. Mahajan's NPI, 1497974539, was assigned on April 25, 2007. Dr. Mahajan holds Massachusetts license 222613.
- NPI
- 1497974539NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224121850
- NPI enumeration date
- April 25, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 432-1811
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ashish Mahajan practices at Nephrology Asssociates of the Merrimack Valley in Tewksbury, Massachusetts
Dr. Mahajan's primary practice is Nephrology Asssociates of the Merrimack Valley, at 600 Clark Rd Suite 2 Suite 2, Tewksbury, MA 01876-1699. The practice phone is (978) 432-1811.
- Nephrology Asssociates of the Merrimack Valley600 Clark Rd Suite 2 Suite 2, Tewksbury, MA 01876-1699Phone(978) 432-1811
Source: Dmand AI Affiliation Data
Dr. Ashish Mahajan is affiliated with 4 sites of care and 1 medical group
Dr. Mahajan's primary practice is Nephrology Asssociates Of The Merrimack Valley in Tewksbury, Massachusetts. Dr. Mahajan is also affiliated with Lowell General Hospital. The medical group on file is Nephrology Associates of the Merrimack Valley. Dmand AI also links Dr. Mahajan to 2 more dialysis centers, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ashish Mahajan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mahajan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nephrology Asssociates Of The Merrimack Valley | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ashish Mahajan is one of 351 nephrologists in Massachusetts
Nephrology is Dr. Mahajan's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Mahajan is licensed in Massachusetts.
Specialties and state licenses
- Nephrology, MassachusettsPrimary
Nephrologists near Dr. Mahajan
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ashish Mahajan billed Medicare for 1,393 services in 2024
CMS data shows 1,393 Medicare services from Dr. Mahajan across 14 procedure codes in 2024, for 460 Medicare patients. Medicare paid $151,252 for them.
Dr. Mahajan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0692024: 1,1346%
- Tests and treatments
- 2023: 4472024: 23747%
- Lab and pathology
- 2023: 302024: 2227%
Where Dr. Mahajan's Medicare services took place, 2024
- In an office56240%
- In a facility83160%
Dr. Mahajan compared with the Massachusetts median for nephrologists, 2024
- Dr. Mahajan
- Massachusetts median
- Medicare services
- 1,393vs 70199% above
- Medicare patients
- 460vs 28263% above
- Part D claims
- 1,349vs 4712.9 times
Medians across 333 nephrologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Mahajan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mahajan and other nephrologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ashish Mahajan treated 460 Medicare patients in 2024, average age 73
CMS counts 460 Medicare patients who saw Dr. Mahajan in 2024. The largest group is 65 to 74, with 180 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 41% are also on Medicaid. Their average risk score is 3.74, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Mahajan's median patient age at 71, with 42% women.
Dr. Mahajan's Medicare patients by age, 2024
Dr. Mahajan's Medicare patients by sex, 2024
- Women19743%
- Men26357%
Chronic conditions among Dr. Mahajan's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes63%
- Heart failure57%
- Ischemic heart disease50%
- Arthritis44%
- Mood disorders41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mahajan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women42%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ashish Mahajan wrote 1,504 Medicare Part D claims in 2024
In 2024, Dr. Mahajan wrote 1,504 Medicare Part D claims for 254 patients. 83% of them were for generic drugs. CMS names the drug for 1,349 of them, across 29 drugs with 11 or more claims each, at $249,989 in total drug cost. In 2023, CMS named 1,302 claims across 30 drugs.
Dr. Mahajan's Part D claims by kind of drug, 2024
- Generic1,252 claims83%
- Brand-name252 claims17%
Dr. Mahajan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Mahajan's Part D claims, 2024
- Antibiotics1%13 of 1,504 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,3022024: 1,3494%
Drugs named by CMS: 29 in 2024, 30 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ashish Mahajan scored 18 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 18 out of 100 for Dr. Mahajan for performance year 2024, reported individually. Dr. Mahajan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Mahajan's MIPS scores, performance year 2024
- 18of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 62of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Ashish Mahajan received $563 in industry payments from 2016 to 2022
CMS Open Payments shows 16 general payments to Dr. Mahajan from 9 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 64% of the total. Relypsa, Inc. paid the most, $200.
General payments to Dr. Mahajan by program year, 2016 to 2022
General payments to Dr. Mahajan by kind, 2016 to 2022
- Food and beverage$36364%
- Speaker and faculty fees$20036%
Companies that paid Dr. Mahajan the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ashish Mahajan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ashish Mahajan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ashish Mahajan's NPI number?
Dr. Ashish Mahajan's NPI number is 1497974539. It was assigned on April 25, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ashish Mahajan?
Dr. Ashish Mahajan is a nephrologist in Tewksbury, Massachusetts. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Ashish Mahajan practice?
Dr. Mahajan practices at 600 Clark Rd Suite 2 Suite 2, Tewksbury, MA 01876-1699. Dr. Mahajan's primary practice is Nephrology Asssociates Of The Merrimack Valley in Tewksbury, Massachusetts. Dmand AI also links Dr. Mahajan to 2 dialysis centers.
What is Dr. Ashish Mahajan's office phone number?
The practice phone on file for Dr. Mahajan is (978) 432-1811.
What is Dr. Ashish Mahajan's medical license number?
Dr. Mahajan holds Massachusetts license 222613.
Which hospitals is Dr. Ashish Mahajan affiliated with?
Dr. Mahajan is affiliated with Lowell General Hospital.
What medical group is Dr. Ashish Mahajan part of?
Dr. Mahajan is linked to Nephrology Associates of the Merrimack Valley.
Does Dr. Ashish Mahajan accept Medicare?
Yes. CMS data shows Dr. Mahajan billed Medicare for 1,393 services in 2024, and Dr. Mahajan accepts Medicare assignment.
What is Dr. Ashish Mahajan's MIPS score?
Dr. Mahajan's MIPS final score for performance year 2024 is 18 out of 100, reported individually.
How many Medicare patients does Dr. Ashish Mahajan see?
CMS counts 460 Medicare patients who saw Dr. Mahajan in 2024, with an average age of 73.
Show 4 more questionsShow fewer questions
What services does Dr. Ashish Mahajan bill to Medicare?
In 2024, Dr. Mahajan's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99214) and dialysis (90960).
What drugs does Dr. Ashish Mahajan prescribe most?
In 2024 Medicare Part D data, Dr. Mahajan's most prescribed drugs by claims were Lisinopril, Amlodipine Besylate and Losartan Potassium.
Has Dr. Ashish Mahajan received payments from drug or device companies?
CMS Open Payments shows $563 in general payments to Dr. Mahajan from 9 companies from 2016 to 2022. The largest total came from Relypsa, Inc.
How long has Dr. Ashish Mahajan been practicing?
Dr. Mahajan graduated from medical school in 2000, 26 years ago.
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