Quick answers
- Does Joseph V. Costanzo accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph V. Costanzo 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 V. Costanzo see?
- In 2024, CMS data shows 287 Original Medicare patients and 1,208 services for Joseph V. Costanzo. This counts Original Medicare only and measures volume, not quality.
- What is Joseph V. Costanzo's NPI number?
- 1093810368. 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 V. Costanzo, 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 | 287 |
|---|---|
| Services billed to Medicare | 1,208 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)352 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)278 services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)149 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)114 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)113 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%
- High blood pressure74%
- Arthritis43%
- Ischemic heart disease28%
- Diabetes27%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)24%
Hospitals where Joseph V. Costanzo works
Medicare's Facility Affiliation Data lists Joseph V. Costanzo 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.
- Greenwich Hospital Association -Greenwich, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070018
- Stamford HospitalStamford, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070006
Practice locations
Addresses where Joseph V. Costanzo is enrolled with Medicare (CMS data updated October 2, 2026).
- 292 Long Ridge RdStamford, CT 06902
- 5 High Ridge Park, Suite 103Stamford, CT 06905 (203) 276‑4644
Group practices
Medicare enrollment lists Joseph V. Costanzo as a member of this group (CMS data updated October 2, 2026).
- Stamford Health Medical Group Inc444 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Stamford
Clinicians with the same Medicare primary specialty in Stamford, CT — not a recommendation.
Other clinicians in Stamford Health Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1987 (39 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) | 1093810368 |
| 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