Quick answers
- Does Marrissa L. Bryan accept Medicare assignment?
- Yes. Medicare's clinician data says Marrissa L. Bryan 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 Marrissa L. Bryan see?
- In 2024, CMS data shows 376 Original Medicare patients and 4,318 services for Marrissa L. Bryan. This counts Original Medicare only and measures volume, not quality.
- What is Marrissa L. Bryan's NPI number?
- 1558964684. 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 Marrissa L. Bryan, 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 | 376 |
|---|---|
| Services billed to Medicare | 4,318 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 81 |
Most frequent services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)2,893 services
- Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)353 services
- Chronic care management services for two or more chronic conditions, first 30 minutes provided personally by health care professional, per calendar month (99491)327 services
- Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes (99310)240 services
- Nursing facility discharge management, more than 30 minutes (99316)164 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%
- Depression65%
- Arthritis60%
- Ischemic heart disease54%
- Diabetes52%
Practice locations
Addresses where Marrissa L. Bryan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1640 Powers Ferry Rd SE, Bldg 15Marietta, GA 30067 (212) 734‑6621
Group practices
Medicare enrollment lists Marrissa L. Bryan as a member of this group (CMS data updated October 2, 2026).
- Georgia Mso LLC31 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Marietta
Clinicians with the same Medicare primary specialty in Marietta, GA — not a recommendation.
Other clinicians in Georgia Mso LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2020 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558964684 |
| 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
- 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