NPI (National Provider Identifier) check digit for US healthcare providers using Luhn algorithm. 10-digit unique identifier required by HIPAA for physicians, pharmacies, hospitals in electronic healthcare transactions. Administered by CMS (Centers for Medicare and Medicaid Services).
| Property | Value |
|---|---|
| Category | Checksums |
| Sub-category | Healthcare Identifier |
| Security status | 🎓 Educational Only |
| Complexity | Beginner |
| Inventor | US Department of Health and Human Services |
| Year | 2007 |
| Origin | 🇺🇸 United States |
| Source | algorithms/checksum/npi-checksum.js |
Status: 🎓 Educational Only
No vulnerabilities are recorded for this implementation.
3 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — Example NPI 1234567893
| Field | Value |
|---|---|
input |
313233343536373839 |
expected |
03 |
Vector 2 — CMS Registry NPI 1993999998
| Field | Value |
|---|---|
input |
313939333939393939 |
expected |
08 |
Vector 3 — Type 2 Organization NPI
| Field | Value |
|---|---|
input |
323334353637383930 |
expected |
00 |