Quick answers
- Does Joseph C. Hannan accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph C. Hannan 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 Joseph C. Hannan see?
- In 2024, CMS data shows 423 Original Medicare patients and 1,434 services for Joseph C. Hannan. This counts Original Medicare only and measures volume, not quality.
- What is Joseph C. Hannan's NPI number?
- 1275513822. 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 Joseph C. Hannan, 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 patients | 423 |
|---|---|
| Services billed to Medicare | 1,434 |
| Different services or procedures | 61 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, regadenoson, 0.1 mg (J2785)192 services
- Technetium tc-99m sestamibi, diagnostic, per study dose (A9500)140 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)132 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)125 services
- Nuclear medicine studies of heart muscle at rest and with stress and spect (78452)87 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 blood pressure75%
- High cholesterol75%
- Ischemic heart disease69%
- Arthritis47%
- Heart failure43%
- Diabetes41%
Hospitals where Joseph C. Hannan works
Medicare's Facility Affiliation Data lists Joseph C. Hannan 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.
- Heywood Hospital -Gardner, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220095
- St Vincent HospitalWorcester, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220176
- UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220163
Practice locations
Addresses where Joseph C. Hannan is enrolled with Medicare (CMS data updated October 2, 2026).
- 5 Neponset StWorcesteer, MA 01606 (508) 595‑2300
Group practices
Medicare enrollment lists Joseph C. Hannan as a member of this group (CMS data updated October 2, 2026).
- Reliant Medical Group Inc640 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Massachusetts →
Other cardiologists in Massachusetts
Clinicians with the same Medicare primary specialty in Massachusetts — not a recommendation.
Other clinicians in Reliant Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1275513822 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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