Quick answers
- Does Kathryn M. McDonnell accept Medicare assignment?
- Yes. Medicare's clinician data says Kathryn M. McDonnell 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 Kathryn M. McDonnell see?
- In 2024, CMS data shows 137 Original Medicare patients and 422 services for Kathryn M. McDonnell. This counts Original Medicare only and measures volume, not quality.
- What is Kathryn M. McDonnell's NPI number?
- 1649357807. 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 Kathryn M. McDonnell, 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 | 137 |
|---|---|
| Services billed to Medicare | 422 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)141 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)53 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)32 services
- Administration of influenza virus vaccine (G0008)30 services
- Influenza vaccine split virus, preservative free (90662)28 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 cholesterol68%
- High blood pressure67%
- Arthritis41%
- Ischemic heart disease21%
- Anxiety20%
- Diabetes17%
Hospitals where Kathryn M. McDonnell works
Medicare's Facility Affiliation Data lists Kathryn M. McDonnell 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.
- Middlesex HospitalMiddletown, CT · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 070020
- 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 Kathryn M. McDonnell is enrolled with Medicare (CMS data updated October 2, 2026).
- 1291 Boston Post Rd, Suite 105Madison, CT 06443 (860) 358‑5100
- 270 Main St, Suite APortland, CT 06480 (860) 358‑5040
Group practices
Medicare enrollment lists Kathryn M. McDonnell as a member of this group (CMS data updated October 2, 2026).
- MHS Primary Care, Inc.180 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Madison
Clinicians with the same Medicare primary specialty in Madison, CT — not a recommendation.
Other clinicians in MHS Primary Care, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649357807 |
| 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