Mark Mathews
Mark Mathews is a provider specialising in Optometrist in Port Richey, FL, registered under NPI 1275560435.
Getting there
The practice address on file is 8319 EMBASSY BLVD, Port Richey, FL 34668. 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 |
|---|---|---|
| OPC1388 | FL | Optometrist primary |
This provider holds licence OPC1388 issued in FL. 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
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 | 1275560435 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 26, 2006 |
| Last updated | Mar 23, 2010 |
| Status | Active |
| Sole proprietor | No |
| Practice address |
8319 EMBASSY BLVD Port Richey, FL 34668 (727) 819-0440 Fax (727) 819-9795 |
| Other identifiers |
DN0867
· RAILROAD GROUP PTAN (FL) 0763230001 · PALMETTO 19872 · INDIVIDUAL BCBS 33801 · GROUP BCBS 232279 · AMERIGROUP 084932400 (FL) 410022395 · RAILROAD GROUP MEMBER PTAN (FL) 1518098102 · RAILROAD GROUP NPI (FL) 410022395 · RAILROAD MEDICARE 1275560435 · MEDICARE NPI (FL) 1275560435 · RAILROAD INDIVIDUAL NPI (FL) 110527 · ECPA-EYE MED |
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 | 7 | 5 | 5 | 6 | 0 | 4 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 5 | 5 | 1 | 6 | 0 | 4 | 6 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
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.