Holger Gieschen, MD
Holger Gieschen, MD is a Radiation Oncology Physician in Memphis, TN, registered under NPI 1295738680.
Getting there
The practice address on file is 1265 UNION AVE, Memphis, TN 38104. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 31088 | TN | Radiation Oncology Physician primary |
This provider holds licence 31088 issued in TN. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Radiation Oncology
- PAC ID
- 4385642362
Enrolled in Medicare 3 times, across 3 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Tennessee | I20061130000085 | Practitioner - Radiation Oncology |
| Mississippi | I20250130000174 | Practitioner - Radiation Oncology |
| Alabama | I20250217002476 | Practitioner - Radiation Oncology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Radiation Oncology. There are 3 separate enrolment records across 3 states (TN, MS, AL). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Radiation Oncology covers
A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors. NUCC Health Care Provider Taxonomy, code 2085R0001X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1295738680 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 31, 2005 |
| Last updated | Jul 8, 2007 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
1265 UNION AVE Memphis, TN 38104 (901) 726-7358 |
| Mailing address |
6075 POPLAR AVE STE 405 Memphis, TN 38119 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 2 | 9 | 5 | 7 | 3 | 8 | 6 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 9 | 5 | 5 | 3 | 7 | 6 | 7 |
Sum = 70 · next multiple of 10 = 70 · check digit = 0 · actual last digit = 0
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.