Quick answers
- Does Shannon L. Gaines accept Medicare assignment?
- Yes. Medicare's clinician data says Shannon L. Gaines 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 Shannon L. Gaines see?
- In 2024, CMS data shows 162 Original Medicare patients and 377 services for Shannon L. Gaines. This counts Original Medicare only and measures volume, not quality.
- What is Shannon L. Gaines's NPI number?
- 1588277958. 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 Shannon L. Gaines, 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 | 162 |
|---|---|
| Services billed to Medicare | 377 |
| Different services or procedures | 37 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
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)62 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)47 services
- Detection test by immunoassay with direct visual observation for influenza virus (87804)42 services
- Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus (87426)33 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)30 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 pressure52%
- Arthritis38%
- Anxiety23%
- Depression20%
- Diabetes19%
Hospitals where Shannon L. Gaines works
Medicare's Facility Affiliation Data lists Shannon L. Gaines 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.
- MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200009
- MaineHealth Mid Coast HospitalBrunswick, ME · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 200021
Practice locations
Addresses where Shannon L. Gaines is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Wellness Way, Suite ATopsham, ME 04086 (207) 406‑7600
- 22 Bramhall StPortland, ME 04102
Group practices
Medicare enrollment lists Shannon L. Gaines as a member of this group (CMS data updated October 2, 2026).
- MaineHealth2,633 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Topsham
Clinicians with the same Medicare primary specialty in Topsham, ME — not a recommendation.
Other clinicians in MaineHealth
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588277958 |
| 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