LAWRENCE CHI CHAO MD A PROFESSIONAL CORPORATION
LAWRENCE CHI CHAO MD A PROFESSIONAL CORPORATION is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1578599197, based in Irvine, CA. The organization lists 3 taxonomy classifications, with Cornea and External Diseases Specialist Physician recorded as primary.
Getting there
The practice address on file is 2500 ALTON PKWY STE 102, Irvine, CA 92606. 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 |
|---|---|---|
| G84067 | CA | Ophthalmology Physician |
This provider holds licence G84067 issued in CA. 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
- Part B Supplier - Clinic/group Practice
- PAC ID
- 8426053034
- Enrollment ID
- O20090512000300
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Clinic/group Practice. 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 Cornea and External Diseases Specialist covers
An ophthalmologist who specializes in diseases of the cornea, sclera, eyelids, conjunctiva, and anterior segment of the eye. NUCC Health Care Provider Taxonomy, code 207WX0120X
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 | |
|---|---|---|---|---|
| 207WX0120X | Cornea and External Diseases Specialist Physician Cornea and External Diseases Specialist | — | — | primary |
| 152W00000X | Optometrist | — | — | |
| 207W00000X | Ophthalmology Physician | G84067 | 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-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 | 1578599197 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jun 24, 2006 |
| Last updated | Mar 23, 2022 |
| Status | Active |
| Practice address |
2500 ALTON PKWY STE 102 Irvine, CA 92606 (949) 679-2426 Fax (949) 679-2616 |
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 | 5 | 7 | 8 | 5 | 9 | 9 | 1 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 5 | 8 | 1 | 9 | 9 | 1 | 9 |
Sum = 73 · next multiple of 10 = 80 · 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.