Michael Karon, M.D, PHD
Michael Karon, M.D, PHD is an Ophthalmology Physician in Frisco, TX, registered under NPI 1003046830. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Frisco, based on OpenStreetMap data collected Sep 2, 2026. Parking is available about 0.23 mi away. A pharmacy sits 0.41 mi from the entrance (Market Street Pharmacy #685), which helps if you leave with a prescription.
Getting here and what is nearby
Parking 834 ft ~4 min
Hotel Canopy by Hilton Dallas Frisco Station 1,008 ft ~4 min
Parking 987 ft ~4 min
Hotel Residence Inn Dallas Frisco 0.23 mi ~5 min
4343 Frisco Green Avenue, Frisco 75034
Parking 0.23 mi ~5 min
Hotel AC Hotel Dallas Frisco 0.26 mi ~6 min
Pharmacy Market Street Pharmacy #685 0.41 mi ~9 min
Grocery Market Street 0.41 mi ~9 min
Convenience 7-Eleven 0.47 mi ~10 min
4420 Legacy Drive, Frisco
Gas station Exxon 0.47 mi ~10 min
4420 Legacy Drive
Restaurant McDonald's 0.47 mi ~10 min
4360 Legacy Drive, Frisco 75034
Mo-Th 05:00-23:00; Fr-Sa 05:00-24:00; Su 06:00-23:00
Restaurant Kotta Sushi Lounge 0.47 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 241707 | MA | Internal Medicine Physician |
| P6433 | TX | Ophthalmology Physician primary |
Licences are recorded in 2 states: MA, TX. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
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.
Licensed in 2 states
This provider holds licences in 2 states: Massachusetts and Texas. The practice address on file is in Frisco, TX, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Ophthalmology covers
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses. NUCC Health Care Provider Taxonomy, code 207W00000X
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 | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | 241707 | MA | |
| 207W00000X | Ophthalmology Physician | P6433 | 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 | 1003046830 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 14, 2009 |
| Last updated | May 1, 2017 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | M.D, PHD |
| Practice address |
6325 ORCHARD PARK DR Frisco, TX 75034 (504) 251-4115 |
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 | 0 | 3 | 0 | 4 | 6 | 8 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 4 | 3 | 8 | 6 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.