MARK JOHNSON, O.D., PLLC
MARK JOHNSON, O.D., PLLC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1952656589, based in Beaumont, TX. The organization lists 5 taxonomy classifications, with Optometrist recorded as primary.
Getting there
The practice address on file is 6155 EASTEX FWY SUITE #699, Beaumont, TX 77706. 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 |
|---|---|---|
| TX4495 | TX | Optometrist primary |
| TX4495T | TX | Corneal and Contact Management Optometrist |
| TX4495T | TX | Technician/Technologist |
| TX4495T | TX | Contact Lens Technician/Technologist |
| TX4495T | TX | Contact Lens Fitter |
This provider holds licence TX4495 issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Optometrist covers
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system. NUCC Health Care Provider Taxonomy, code 152W00000X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 152W00000X | Optometrist | TX4495 | TX | primary |
| 152WC0802X | Corneal and Contact Management Optometrist Corneal and Contact Management | TX4495T | TX | |
| 156F00000X | Technician/Technologist | TX4495T | TX | |
| 156FC0800X | Contact Lens Technician/Technologist Contact Lens | TX4495T | TX | |
| 156FC0801X | Contact Lens Fitter Contact Lens Fitter | TX4495T | TX |
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1952656589 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jul 19, 2012 |
| Last updated | Jul 19, 2012 |
| Status | Active |
| Practice address |
6155 EASTEX FWY SUITE #699 Beaumont, TX 77706 (409) 892-4790 |
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 | 9 | 5 | 2 | 6 | 5 | 6 | 5 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 1 | 2 | 3 | 5 | 3 | 5 | 7 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.