Quick answers
- Does Mariann McElwain accept Medicare assignment?
- Yes. Medicare's clinician data says Mariann McElwain 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 Mariann McElwain see?
- In 2024, CMS data shows 403 Original Medicare patients and 3,476 services for Mariann McElwain. This counts Original Medicare only and measures volume, not quality.
- What is Mariann McElwain's NPI number?
- 1134117757. 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 Mariann McElwain, 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 | 403 |
|---|---|
| Services billed to Medicare | 3,476 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Professional service for preparation and provision of 1 or more antigens (95165)670 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)576 services
- Test for allergy using allergenic extract (95004)368 services
- Professional service for multiple injections of allergen (95117)356 services
- Removal of impacted ear wax (69210)272 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 cholesterol75%
- High blood pressure71%
- Arthritis49%
- Diabetes23%
- Ischemic heart disease23%
- Anxiety23%
Hospitals where Mariann McElwain works
Medicare's Facility Affiliation Data lists Mariann McElwain 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.
- Northeast Georgia Medical Center, IncGainesville, GA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 110029
Practice locations
Addresses where Mariann McElwain is enrolled with Medicare (CMS data updated October 2, 2026).
- 2406 Lighthouse Manor DrGainesville, GA 30501 (770) 536‑4352
Group practices
Medicare enrollment lists Mariann McElwain as a member of this group (CMS data updated October 2, 2026).
- Northeast Georgia Otolaryngology12 clinicians in the group
Specialties
- Otolaryngologyprimary
Other ENT doctors in Gainesville
Clinicians with the same Medicare primary specialty in Gainesville, GA — not a recommendation.
Other clinicians in Northeast Georgia Otolaryngology
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Pittsburgh School Of Medicine |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134117757 |
| 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