Mark Hackbarth, MD
Mark Hackbarth, MD is an Addiction Medicine (Anesthesiology) Physician in Henderson, TX, registered under NPI 1629071527. 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 300 WILSON ST, Henderson, TX 75652. 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 |
|---|---|---|
| G3420 | TX | Pain Medicine (Anesthesiology) Physician |
| G3420 | TX | Addiction Medicine (Anesthesiology)… primary |
This provider holds licence G3420 issued in TX. 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 - Addiction Medicine
- PAC ID
- 7719972967
- Enrollment ID
- I20040416001122
Medicare enrolment is recorded as approved under the provider type Practitioner - Addiction Medicine. 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 Addiction Medicine covers
An anesthesiologist who specializes in the diagnosis and treatment of addictions. NUCC Health Care Provider Taxonomy, code 207LA0401X
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 | |
|---|---|---|---|---|
| 207LP2900X | Pain Medicine (Anesthesiology) Physician Pain Medicine | G3420 | TX | |
| 207LA0401X | Addiction Medicine (Anesthesiology) Physician Addiction Medicine | G3420 | TX | primary |
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 | 1629071527 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 24, 2005 |
| Last updated | Jul 14, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
300 WILSON ST Henderson, TX 75652 (903) 655-6536 |
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 | 6 | 2 | 9 | 0 | 7 | 1 | 5 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 4 | 9 | 0 | 7 | 2 | 5 | 4 |
Sum = 63 · next multiple of 10 = 70 · check digit = 7 · actual last digit = 7
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.