Quick answers
- Does Ann M. Cosgrove accept Medicare assignment?
- Yes. Medicare's clinician data says Ann M. Cosgrove 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 Ann M. Cosgrove see?
- In 2024, CMS data shows 303 Original Medicare patients and 938 services for Ann M. Cosgrove. This counts Original Medicare only and measures volume, not quality.
- What is Ann M. Cosgrove's NPI number?
- 1346473493. 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 Ann M. Cosgrove, 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 | 303 |
|---|---|
| Services billed to Medicare | 938 |
| Different services or procedures | 14 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days (93296)306 services
- Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)210 services
- Evaluation of cardiac rhythm monitor system, remote up to 30 days (93298)123 services
- Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days (93295)98 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)85 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%
- Atrial fibrillation67%
- Arthritis55%
- Ischemic heart disease52%
- Heart failure52%
Hospitals where Ann M. Cosgrove works
Medicare's Facility Affiliation Data lists Ann M. Cosgrove 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.
- Lawrence & Memorial HospitalNew London, CT · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 070007
- Yale-New Haven HospitalNew Haven, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070022
Practice locations
Addresses where Ann M. Cosgrove is enrolled with Medicare (CMS data updated October 2, 2026).
- 20 York StNew Haven, CT 06510 (203) 785‑4638
Group practices
Medicare enrollment lists Ann M. Cosgrove as a member of this group (CMS data updated October 2, 2026).
- Yale University2,645 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in New Haven
Clinicians with the same Medicare primary specialty in New Haven, CT — not a recommendation.
Other clinicians in Yale University
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 1998 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1346473493 |
| 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