KHOSROW MAHDAVI, M.D., INC
KHOSROW MAHDAVI, M.D., INC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1124229554, based in Newport Beach, CA. The organization lists 2 taxonomy classifications, with Oncology Clinic/Center recorded as primary.
Getting there
The practice address on file is 4000 W COAST HWY SUITE 3D, Newport Beach, CA 92663. 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 |
|---|---|---|
| A33589 | CA | Oncology Clinic/Center primary |
| A33589 | CA | Infusion Therapy Clinic/Center |
This provider holds licence A33589 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 Oncology covers
An entity, facility, or distinct part of a facility providing diagnostic, treatment and prescriptive services related to cancerous conditions. Services include chemotherapy infusions and monitoring of implanted chemotherapeutic agents. NUCC Health Care Provider Taxonomy, code 261QX0200X
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 | |
|---|---|---|---|---|
| 261QX0200X | Oncology Clinic/Center Oncology | A33589 | CA | primary |
| 261QI0500X | Infusion Therapy Clinic/Center Infusion Therapy | A33589 | 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 | 1124229554 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | May 31, 2007 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Practice address |
4000 W COAST HWY SUITE 3D Newport Beach, CA 92663 (949) 642-8566 Fax (949) 642-0746 |
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 | 1 | 2 | 4 | 2 | 2 | 9 | 5 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 4 | 4 | 4 | 2 | 9 | 5 | 1 |
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.