Quick answers
- Does Mary-Elizabeth Carnaghan accept Medicare assignment?
- Yes. Medicare's clinician data says Mary-Elizabeth Carnaghan 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 Mary-Elizabeth Carnaghan see?
- In 2024, CMS data shows 225 Original Medicare patients and 630 services for Mary-Elizabeth Carnaghan. This counts Original Medicare only and measures volume, not quality.
- What is Mary-Elizabeth Carnaghan's NPI number?
- 1811250764. 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 Mary-Elizabeth Carnaghan, 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 | 225 |
|---|---|
| Services billed to Medicare | 630 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)213 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)212 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)77 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)54 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)47 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 disease59%
- Atrial fibrillation56%
- Arthritis50%
- Heart failure41%
Hospitals where Mary-Elizabeth Carnaghan works
Medicare's Facility Affiliation Data lists Mary-Elizabeth Carnaghan 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.
- Good Shepherd Medical CenterHermiston, OR · Critical Access Hospital · Emergency services: listed by Medicare · CCN 381325
- Kadlec Regional Medical CenterRichland, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500058
- St Anthony HospitalPendleton, OR · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 381319
Practice locations
Addresses where Mary-Elizabeth Carnaghan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1135 Jadwin AveRichland, WA 99352 (509) 942‑3300
- 3900 S Zintel Way, Suite 110Kennewick, WA 99337 (509) 942‑3125
Group practices
Medicare enrollment lists Mary-Elizabeth Carnaghan as a member of this group (CMS data updated October 2, 2026).
- Kadlec Regional Medical Center414 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Richland
Clinicians with the same Medicare primary specialty in Richland, WA — not a recommendation.
Other clinicians in Kadlec Regional Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| School | University Of Washington School Of Medicine |
| Graduation year | 2010 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811250764 |
| 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