Mary Allen Olson, APRN, PMHNP-BC

Mary Allen Olson is a Psychiatric/Mental Health Nurse Practitioner provider (Nurse Practitioner) practicing in Hernando, MS, registered in the NPPES registry with NPI 1497488779 since 2022. The credential APRN stands for Advanced Practice Registered Nurse. Practices at In Focus Psychiatry LLC (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum

NPI	1497488779
Entity type	Individual (Type 1)
Name	Mary Allen Olson
Credential	APRN, PMHNP-BC
Sex	Female
Practice address	220 OAK TREE DR, Hernando, MS, 38632
Phone	6625108606
Enumeration date	2022-07-05
Last updated in NPPES	2026-03-17

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
363LP0808X	Psychiatric/Mental Health Nurse Practitioner	Primary	905248	MS

APRN — Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Copy-ready billing details

Provider: Mary Allen Olson, APRN, PMHNP-BC
NPI: 1497488779
Taxonomy: 363LP0808X (Psychiatric/Mental Health Nurse Practitioner)
Address: 220 OAK TREE DR, Hernando, MS, 38632

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1497123343	Erin Harrell	Individual	Psychiatric/Mental Health Nurse Practitioner	Hernando, MS
1578913885	In Focus Psychiatry LLC	Organization	Psychiatric/Mental Health Nurse Practitioner	Hernando, MS
1124627690	Alison Perryman	Individual	Psychiatric/Mental Health Nurse Practitioner	Hernando, MS
1417832171	Elizabeth Dougher	Individual	Psychiatric/Mental Health Nurse Practitioner	Hernando, MS

Verify this record

Cross-check NPI 1497488779 against the authoritative CMS record: view Mary Allen Olson on the official NPPES registry .

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 or validate an NPI number.

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 Mary Allen Olson?

Mary Allen Olson is registered in NPPES with the primary taxonomy of Psychiatric/Mental Health Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2026-03-17.