Quick answers
- Which hospitals does Hariharan Subramanian work at?
- Medicare's official clinician data lists Hariharan Subramanian at 4 hospitals: Baystate Medical Center, Holyoke Medical Center, Mercy Medical Center and The Cooley Dickinson Hospital Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Hariharan Subramanian see patients?
- Medicare's clinician data lists 1 practice location in Holyoke, MA. Call before your visit to confirm the address.
- What is Hariharan Subramanian's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Hariharan Subramanian accept Medicare assignment?
- Yes. Medicare's clinician data says Hariharan Subramanian accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is Hariharan Subramanian's NPI number?
- 1801080080. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Hariharan Subramanian works
Medicare's Facility Affiliation Data lists Hariharan Subramanian at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baystate Medical CenterSpringfield, MA · Acute Care Hospital · CCN 220077
- Holyoke Medical CenterHolyoke, MA · Acute Care Hospital · CCN 220024
- Mercy Medical CenterSpringfield, MA · Acute Care Hospital · CCN 220066
- The Cooley Dickinson Hospital IncNorthampton, MA · Acute Care Hospital · CCN 220015
Practice locations
Addresses where Hariharan Subramanian is enrolled with Medicare (CMS data updated 2026-10-02).
- 575 Beech StHolyoke, MA 01040
Group practices
Medicare enrollment lists Hariharan Subramanian as a member of this group (CMS data updated 2026-10-02).
- Holyoke Medical Center Inc205 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Massachusetts →
Other cardiologists in Holyoke
Clinicians with the same Medicare primary specialty in Holyoke, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801080080 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians