Thomas Johnston, MD
Thomas Johnston, MD is an Advanced Heart Failure and Transplant Cardiology Physician in Nashville, TN, registered under NPI 1023103462. 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 2400 PATTERSON ST SUITE 502, Nashville, TN 37203. 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 |
|---|---|---|
| 20872 | TN | Advanced Heart Failure and Transplant… primary |
| MD20872 | TN | Cardiovascular Disease Physician |
This provider holds licence 20872 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 - Cardiovascular Disease (cardiology)
- PAC ID
- 3476653114
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Tennessee | I20070711000339 | Practitioner - Cardiovascular Disease (cardiology) |
| Kentucky | I20090121000017 | Practitioner - Cardiovascular Disease (cardiology) |
Medicare enrolment is recorded as approved under the provider type Practitioner - Cardiovascular Disease (cardiology). There are 2 separate enrolment records across 2 states (TN, KY). 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 Advanced Heart Failure and Transplant Cardiology covers
Specialists in Advanced Heart Failure and Transplant Cardiology would participate in the inpatient and outpatient management of patients with advanced heart failure across the spectrum from consideration for high-risk cardiac surgery, cardiac transplantation, or mechanical circulatory support, to pre-and post-operative evaluation and management of patients with cardiac transplants and mechanical support devices, and end-of-life care for patients with end-stage heart failure. NUCC Health Care Provider Taxonomy, code 207RA0001X
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 | |
|---|---|---|---|---|
| 207RA0001X | Advanced Heart Failure and Transplant Cardiology Physician Advanced Heart Failure and Transplant Cardiology | 20872 | TN | primary |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | MD20872 | TN |
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 | 1023103462 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 3, 2006 |
| Last updated | Jan 27, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
2400 PATTERSON ST SUITE 502 Nashville, TN 37203 (615) 515-1900 Fax (615) 292-4633 |
| Other identifiers |
3825351
· Medicaid (TN) 4140116 · Other (TN) 64929201 · Medicaid (KY) P00396443 · Other (TN) |
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 | 0 | 2 | 3 | 1 | 0 | 3 | 4 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 4 | 3 | 2 | 0 | 6 | 4 | 3 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
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.