Quick answers
- Does Riley McKeown accept Medicare assignment?
- Yes. Medicare's clinician data says Riley McKeown 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 Riley McKeown see?
- In 2024, CMS data shows 155 Original Medicare patients and 345 services for Riley McKeown. This counts Original Medicare only and measures volume, not quality.
- What is Riley McKeown's NPI number?
- 1598414443. 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 Riley McKeown, 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 | 155 |
|---|---|
| Services billed to Medicare | 345 |
| Different services or procedures | 37 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)58 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)51 services
- Detection test by immunoassay with direct visual observation for influenza virus (87804)39 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)34 services
- Automated urinalysis test (81003)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 cholesterol64%
- High blood pressure50%
- Arthritis35%
- Anxiety32%
- Depression25%
- Diabetes19%
Hospitals where Riley McKeown works
Medicare's Facility Affiliation Data lists Riley McKeown 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.
- Northern Light Mercy HospitalPortland, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200008
Practice locations
Addresses where Riley McKeown is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 10; the Medicare profile lists all.
- 1420 Main StSanford, ME 04073 (207) 850‑5744
- 19 S Gorham XingGorham, ME 04038 (207) 535‑1400
- 191 Marginal WayPortland, ME 04101 (207) 517‑3838
- 193 Bath RdBrunswick, ME 04011 (207) 424‑2272
- 4 Whitten RdAugusta, ME 04330 (207) 466‑2400
Group practices
Medicare enrollment lists Riley McKeown as a member of these groups (CMS data updated October 2, 2026).
- Convenientmd - FFS UC LLC392 clinicians in the group
- Mercy Hospital301 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Sanford
Clinicians with the same Medicare primary specialty in Sanford, ME — not a recommendation.
Other clinicians in Convenientmd - FFS UC LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598414443 |
| 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