Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Arlen C Riis, APRN,CC
Counselor in Oxford, ME · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821283755
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Registry record
Entity type Individual (Type 1)
Name Arlen C Riis
Credential APRN,CC
Sex Female
Practice address 143 Pottle Road, Oxford, ME, 04270
Phone (207) 743-7911
Enumeration date Sep 13, 2007
Last updated in NPPES Sep 13, 2007
Taxonomy & licenses
APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists.
About the APRN credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| NP2259 | Medicaid | ME | - |
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 Arlen Riis?
Arlen Riis is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-13.