Quick answers
- Does Andrew K. Nielsen accept Medicare assignment?
- Medicare's clinician data says Andrew K. Nielsen may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Andrew K. Nielsen's NPI number?
- 1093155913. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Andrew K. Nielsen works
Medicare's Facility Affiliation Data lists Andrew K. Nielsen 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.
- Marshall Medical CenterLewisburg, TN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 441309
- Maury Regional HospitalColumbia, TN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 440073
Practice locations
Addresses where Andrew K. Nielsen is enrolled with Medicare (CMS data updated October 2, 2026).
Group practices
Medicare enrollment lists Andrew K. Nielsen as a member of this group (CMS data updated October 2, 2026).
- Maury Regional Hospital32 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Columbia
Clinicians with the same Medicare primary specialty in Columbia, TN — not a recommendation.
Other clinicians in Maury Regional Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1093155913 |
| 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
- 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