Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Douglas Earl Rehder, AU.D.
Audiologist in Billings, MT · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598838179
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Registry record
Entity type Individual (Type 1)
Name Dr. Douglas Earl Rehder
Credential AU.D.
Sex Male
Practice address 1101 N 27th St, Suite E, Billings, MT, 59101
Phone (406) 245-6893
Enumeration date Nov 15, 2006
Last updated in NPPES Aug 11, 2009
Taxonomy & licenses
231HA2400X Assistive Technology Practitioner Audiologist Speech, Language and Hearing Service Providers · License SA73 (MT) Secondary
231HA2500X Assistive Technology Supplier Audiologist Speech, Language and Hearing Service Providers · License SA73 (MT) Secondary
237600000X Audiologist-Hearing Aid Fitter Speech, Language and Hearing Service Providers · License SA73 (MT) Secondary
AUD · Doctor of Audiology: A licensed audiologist diagnosing and treating hearing and balance disorders.
About the AUD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 000290218 | Other | MT | BCBS |
| 0535092 | Medicaid | MT | - |
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Douglas Rehder?
Douglas Rehder is registered in NPPES with the primary taxonomy of Audiologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-08-11.