Mark Estrada, M.D.
Mark Estrada, M.D. is a Nuclear Radiology Physician in Greenwood, IN, registered under NPI 1760425284. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 75 N STATE ROAD 135, Greenwood, IN 46142. 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 |
|---|---|---|
| 01044930 | IN | Nuclear Radiology Physician primary |
| 01044930 | IN | Diagnostic Radiology Physician |
This provider holds licence 01044930 issued in IN. 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 - Diagnostic Radiology
- PAC ID
- 0446211445
Medicare enrolment is recorded as approved under the provider type Practitioner - Diagnostic Radiology. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Nuclear Radiology covers
A radiologist who is involved in the analysis and imaging of radionuclides and radiolabeled substances in vitro and in vivo for diagnosis and the administration of radionuclides and radiolabeled substances for the treatment of disease. NUCC Health Care Provider Taxonomy, code 2085N0904X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2085N0904X | Nuclear Radiology Physician Nuclear Radiology | 01044930 | IN | primary |
| 2085R0202X | Diagnostic Radiology Physician Diagnostic Radiology | 01044930 | IN |
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 | 1760425284 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 13, 2006 |
| Last updated | Mar 16, 2021 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
75 N STATE ROAD 135 Greenwood, IN 46142 (317) 962-6793 |
| Mailing address |
250 N SHADELAND AVE Indianapolis, IN 46219 |
| Other identifiers |
P00176826
· RAILROAD MEDICARE (IN) 200186830 (IN) |
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 | 7 | 6 | 0 | 4 | 2 | 5 | 2 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 3 | 0 | 8 | 2 | 1 | 2 | 7 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
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.