Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Greta Oliver

Peer Specialist in Newark, OH · enumerated 2023.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1831890086

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Greta Oliver

Sex Female

Practice address 30 S 4th St, Newark, OH, 43055

Phone (380) 201-1313

Enumeration date Mar 14, 2023

Last updated in NPPES Mar 14, 2023

Taxonomy & licenses

175T00000X Peer Specialist Other Service Providers Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Greta Oliver?

Greta Oliver is registered in NPPES with the primary taxonomy of Peer Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

Browse all →

Jerri Kelley Addiction (Substance Use Disorder) Counselor · Newark, OH NPI 1871029710 Jennifer Lacknett Addiction (Substance Use Disorder) Counselor · Newark, OH NPI 1699296947 Selena Grooms Case Manager/Care Coordinator · Newark, OH NPI 1124581160 Hunter Santurello Clinical Social Worker · Newark, OH NPI 1932793981 Breanna Long Addiction (Substance Use Disorder) Counselor · Newark, OH NPI 1427703255 Tracy Ramsey Peer Specialist · Newark, OH NPI 1801519350 Laurel Ridenbaugh Addiction (Substance Use Disorder) Counselor · Newark, OH NPI 1063136612 Joel Isaacson Peer Specialist · Newark, OH NPI 1821707357

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-14.