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Hematology/Oncology

Abiramy Maheswaran, MD

Works at hospitals in Marlborough, MA · Southbridge, MA · Leominster, MA … · Massachusetts

Summary

Dr. Abiramy Maheswaran, MD is a hematologist-oncologist at 275 Nichols Rd, Fitchburg, MA 01420. Phone: (978) 343-5048. Accepts Medicare assignment. In 2024, Abiramy Maheswaran had 151 Original Medicare patients and 216 services. NPI 1568859502. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Abiramy Maheswaran, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Abiramy Maheswaran accept Medicare assignment?
Yes. Medicare's clinician data says Abiramy Maheswaran accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Abiramy Maheswaran see?
In 2024, CMS data shows 151 Original Medicare patients and 216 services for Abiramy Maheswaran. This counts Original Medicare only and measures volume, not quality.
What is Abiramy Maheswaran's NPI number?
1568859502. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Abiramy Maheswaran, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients151
Services billed to Medicare216
Different services or procedures13
Participating Medicare providerYes
Average age of these patients72

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)96 services
  2. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)47 services
  3. Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)11 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
  • High blood pressure73%
  • Arthritis42%
  • Chronic kidney disease34%
  • Anxiety32%

Hospitals where Abiramy Maheswaran works

Medicare's Facility Affiliation Data lists Abiramy Maheswaran at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Abiramy Maheswaran is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Abiramy Maheswaran as a member of this group (CMS data updated October 2, 2026).

  • UMass Memorial Medical Group Inc2,516 clinicians in the group

Specialties

Find other Hematology/Oncology doctors in Massachusetts →

Other hematologist-oncologists in Fitchburg

Clinicians with the same Medicare primary specialty in Fitchburg, MA — not a recommendation.

All hematologist-oncologists in Fitchburg →

Other clinicians in UMass Memorial Medical Group Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolBoston University School Of Medicine
Graduation year2015 (11 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1568859502
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians