Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Aspen I Ralph, DO
Internal Medicine Physician in Tucson, AZ · enumerated 2005 · practices at Northwest Allied Physicians LLC.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1548264450
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 2Z1203 | Other | AZ | HEALTH NET |
| AZ0758740 | Other | AZ | BLUE CROSS BLUE SHIELD |
| 3122834 | Other | AZ | AETNA HEALTHCARE |
| 860750942 | Other | AZ | ARIZONA FOUNDATION |
| 0402296 | Other | AZ | UNITED HEALTHCARE |
| 2192402 | Other | AZ | FIRST HEALTH |
| 8671843002 | Other | AZ | CIGNA HEALTHCARE |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.