Quick answers
- Does Marc A. Aiken accept Medicare assignment?
- Yes. Medicare's clinician data says Marc A. Aiken 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 Marc A. Aiken see?
- In 2024, CMS data shows 195 Original Medicare patients and 1,014 services for Marc A. Aiken. This counts Original Medicare only and measures volume, not quality.
- What is Marc A. Aiken's NPI number?
- 1558327395. 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 Marc A. Aiken, 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 | 195 |
|---|---|
| Services billed to Medicare | 1,014 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)184 services
- Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)123 services
- X-ray of knee, 3 views (73562)106 services
- X-ray of hip, 2-3 views (73502)37 services
- Aspiration and/or injection of fluid from large joint (20610)36 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%
- Arthritis75%
- Diabetes28%
- Ischemic heart disease28%
- Chronic kidney disease28%
Practice locations
Addresses where Marc A. Aiken is enrolled with Medicare (CMS data updated October 2, 2026).
- 2410 Susannah StJohnson City, TN 37601 (423) 282‑9011
Group practices
Medicare enrollment lists Marc A. Aiken as a member of this group (CMS data updated October 2, 2026).
- Watauga Orthopaedics PLC85 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Johnson City
Clinicians with the same Medicare primary specialty in Johnson City, TN — not a recommendation.
Other clinicians in Watauga Orthopaedics PLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Mississippi School Of Medicine |
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558327395 |
| 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