RALPH B. HANAHAN M.D. – NPI #1801986641
Radiology
RALPH HANAHAN is a radiologist located in SANTA ROSA, CA. NPPES has assigned the NPI number 1801986641 to RALPH HANAHAN on October 13, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 2085R0203X from the Health Care Provider Taxonomy code set, which is classified as Radiology, specializing in Radiation Oncology
The NPI profile was last updated on Sep 11, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for RALPH HANAHAN below.
NPI Profile for
RALPH B. HANAHAN
(more than 19 years ago)
SANTA ROSA, CA 95403-1757 Phone: (707) 522-6875 Fax: (707) 576-0445
Identifiers for RALPH HANAHAN
Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.
| Description | Issuer | State | Identifier |
|---|---|---|---|
| medicaid | CA | 00C305000 |
A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.
| Taxonomy Classification / Specialization | State | License |
|---|---|---|
| 2085R0203X - Radiology / Radiation Oncology (Primary) |
CA | C30500 |
| 2085R0001X - Radiology / Radiation Oncology |
CA | C30500 |
The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.