Chris Arca, MD
Chris Arca, MD is a Neurology with Special Qualifications in Child Neurology Physician in Riverside, CA, registered under NPI 1275987216.
Getting there
The practice address on file is 4149 CHESTNUT ST, Riverside, CA 92501. 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 |
|---|---|---|
| A153243 | CA | Neurology with Special Qualifications in… primary |
This provider holds licence A153243 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
- Practitioner - Neurology
- PAC ID
- 0840658845
Enrolled in Medicare 4 times, across 4 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Colorado | I20230623001123 | Practitioner - Neurology |
| Oregon | I20230707002147 | Practitioner - Neurology |
| California | I20240404000800 | Practitioner - Neurology |
| Washington | I20250926000144 | Practitioner - Neurology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Neurology. There are 4 separate enrolment records across 4 states (CO, OR, CA, WA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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 Neurology with Special Qualifications in Child Neurology covers
A Child Neurologist specializes in neurology with special skills in diagnosis and treatment of neurologic disorders of the neonatal period, infancy, early childhood, and adolescence. NUCC Health Care Provider Taxonomy, code 2084N0402X
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 | 1275987216 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 15, 2016 |
| Last updated | Jul 8, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
4149 CHESTNUT ST Riverside, CA 92501 (951) 498-3661 |
| Mailing address |
11234 ANDERSON ST SUITE C Loma Linda, CA 92354 |
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 | 9 | 8 | 7 | 2 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 5 | 5 | 9 | 8 | 5 | 2 | 2 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
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.