Mark Park, O.D.
Mark Park, O.D. is a provider specialising in Corneal and Contact Management Optometrist in Encino, CA, registered under NPI 1720049034. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 6345 BALBOA BLVD BUILDING 3, SUITE 250, Encino, CA 91316. 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 |
|---|---|---|
| 11381T | CA | Corneal and Contact Management Optometrist primary |
| 11381T | CA | Optometrist |
| 11381T | CA | Vision Therapy Optometrist |
This provider holds licence 11381T issued in CA. 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 Corneal and Contact Management covers
The professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability to sustain successful contact lens wear, and treatment of any external eye or corneal condition which can affect contact lens wear. NUCC Health Care Provider Taxonomy, code 152WC0802X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 152WC0802X | Corneal and Contact Management Optometrist Corneal and Contact Management | 11381T | CA | primary |
| 152W00000X | Optometrist | 11381T | CA | |
| 152WV0400X | Vision Therapy Optometrist Vision Therapy | 11381T | CA |
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 | 1720049034 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 28, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | O.D. |
| Practice address |
6345 BALBOA BLVD BUILDING 3, SUITE 250 Encino, CA 91316 (818) 344-3937 Fax (818) 344-1229 |
| Mailing address |
10507 ILONA AVE Los Angeles, CA 90064 |
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 | 7 | 2 | 0 | 0 | 4 | 9 | 0 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 4 | 0 | 0 | 4 | 9 | 0 | 6 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
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.