Quick answers
- Does Adam C. Niemann accept Medicare assignment?
- Yes. Medicare's clinician data says Adam C. Niemann 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 Adam C. Niemann see?
- In 2024, CMS data shows 118 Original Medicare patients and 211 services for Adam C. Niemann. This counts Original Medicare only and measures volume, not quality.
- What is Adam C. Niemann's NPI number?
- 1780188292. 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 Adam C. Niemann, 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 | 118 |
|---|---|
| Services billed to Medicare | 211 |
| Different services or procedures | 19 |
| 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)44 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)33 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)24 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)24 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)18 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 cholesterol69%
- High blood pressure68%
- Arthritis50%
- Diabetes34%
- Anxiety27%
- Ischemic heart disease23%
Hospitals where Adam C. Niemann works
Medicare's Facility Affiliation Data lists Adam C. Niemann 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.
- Blessing HospitalQuincy, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140015
- Memorial HospitalCarthage, IL · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 141305
- Sarah D Culbertson Memorial HospitalRushville, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141333
- Southeast Iowa Regional Medical CenterWest Burlington, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160057
Practice locations
Addresses where Adam C. Niemann is enrolled with Medicare (CMS data updated October 2, 2026).
- 1118 Hampshire StQuincy, IL 62301 (217) 222‑6550
- 238 S Congress StRushville, IL 62681 (217) 322‑5296
Group practices
Medicare enrollment lists Adam C. Niemann as a member of these groups (CMS data updated October 2, 2026).
- Quincy Physicians and Surgeons Clinic, PLLC223 clinicians in the group
- Schuyler County Hospital District45 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Quincy
Clinicians with the same Medicare primary specialty in Quincy, IL — not a recommendation.
Other clinicians in Quincy Physicians and Surgeons Clinic, PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780188292 |
| 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