Quick answers
- Does Theodore H. Niemann accept Medicare assignment?
- Yes. Medicare's clinician data says Theodore H. 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 Theodore H. Niemann see?
- In 2024, CMS data shows 540 Original Medicare patients and 1,458 services for Theodore H. Niemann. This counts Original Medicare only and measures volume, not quality.
- What is Theodore H. Niemann's NPI number?
- 1770577694. 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 Theodore H. 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 | 540 |
|---|---|
| Services billed to Medicare | 1,458 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)634 services
- Special stained specimen slides to examine tissue, each additional procedure (88341)260 services
- Pathology examination of tissue using a microscope, moderately high complexity (88307)88 services
- Special stained specimen slides to examine tissue, initial procedure (88342)88 services
- Microscopic genetic analysis of tumor, manual (88360)71 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%
- Arthritis54%
- Diabetes40%
- Ischemic heart disease36%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)36%
Hospitals where Theodore H. Niemann works
Medicare's Facility Affiliation Data lists Theodore H. 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.
- Grant Medical CenterColumbus, OH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 360017
- Mount Carmel DublinDublin, OH · Acute Care Hospital · Emergency services: listed by Medicare · CCN 360375
- Mount Carmel East & WestColumbus, OH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 360035
- Mount Carmel New Albany Surgical HospitalNew Albany, OH · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 360266
- Mount Carmel St Ann'sWesterville, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360012
Practice locations
Addresses where Theodore H. Niemann is enrolled with Medicare (CMS data updated October 2, 2026).
- 4105 Emerald Pkwy, Mt. Carmel Dublin Pathology DeptDublin, OH 43016 (614) 234‑6000
- 6001 E Broad StColumbus, OH 43213 (614) 234‑6000
Group practices
Medicare enrollment lists Theodore H. Niemann as a member of this group (CMS data updated October 2, 2026).
- Central Ohio Pathology Associates8 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Dublin
Clinicians with the same Medicare primary specialty in Dublin, OH — not a recommendation.
Other clinicians in Central Ohio Pathology Associates
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Southern Illinois University School Of Medicine |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770577694 |
| 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