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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

KATELYN ROSE MCMAHAN MD
NPI 1942883541
Psychiatry & Neurology - Psychiatry in Corvallis, OR

Active since April 30, 2021PECOS Enrolled
3600 NW SAMARITAN DR, CORVALLIS, OR 97330(541) 768-4906 Get Directions Write a Review

NPPES record last updated: June 26, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Oct 20, 2022, Apr 30, 2021 (2 updates tracked since 2021).

About Katelyn Rose Mcmahan Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KATELYN ROSE MCMAHAN MD (NPI 1942883541) is an individual psychiatry provider in Corvallis, Oregon, licensed in Oregon (MD214923) and active in the NPI registry since April 2021. She is enrolled in Medicare PECOS and is a graduate of University Of North Dakota School Of Medicine (2021).

NPPES Registry Identity

NPI1942883541
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameKATELYN ROSE MCMAHANCredential: MD
Location Address3600 NW SAMARITAN DRCorvallis, OR 97330-3737
Mailing Address3600 Nw Samaritan DrCorvallis, OR 97330-3737
Phone(541) 768-4906
Sole ProprietorNo
Medical School CMSUniversity Of North Dakota School Of MedicineGraduated 2021
Enumeration DateApril 30, 2021
Last NPPES UpdateJune 26, 20262 updates tracked since enumeration
NPPES CertifiedJune 26, 2026
✔ NPI 1942883541 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Licenses✔ Licensed in OR · MD214923✔ Licensed in OR · PG205135
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
3600 NW SAMARITAN DR, Corvallis, OR 97330
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Other Names 1

Former Name (1)Katelyn Rose Ruark

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Katelyn Rose Mcmahan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5698178390
PECOS Enrollment IDI20260709001747
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97330 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$166.64 typical visit price
range $54.96 – $166.64
Typical copayment $41.66 (range $13.74 – $41.66)
Most-billed visit code 99205
Established Patient
$68.64 typical visit price
range $17.68 – $136.19
Typical copayment $17.16 (range $4.42 – $34.04)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ELIZABETH BURNS MCQUITTY M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
3600 NW SAMARITAN DR, PATHOLOGY DEPT
CORVALLIS, OR 97330
Benton County (541) 768-6697
MS. KIM SCHLESSINGER ANP-BC
Nurse Practitioner (Adult Health)
3600 NW SAMARITAN DR
CORVALLIS, OR 97330
Benton County (541) 768-6687
DR. PARINAV KANWAR
Student in an Organized Health Care Education/Training Program
3600 NW SAMARITAN DR
CORVALLIS, OR 97330
Benton County (541) 768-4906
SAMUEL ARNOT DO
Internal Medicine
3600 NW SAMARITAN DR
CORVALLIS, OR 97330
Benton County (541) 768-5111
DANIELLE MICHELLE NIEMANN DO
Student in an Organized Health Care Education/Training Program
3600 NW SAMARITAN DR
CORVALLIS, OR 97330
Benton County (541) 768-4906
MOHAN AVULA DO
Internal Medicine
3600 NW SAMARITAN DR
CORVALLIS, OR 97330
Benton County (541) 768-4906
DR. RANDALL V. BREAM M.D.
Internal Medicine (Cardiovascular Disease)
3600 NW SAMARITAN DR, SUITE E350
CORVALLIS, OR 97330
Benton County (541) 768-5205
DR. DESTINY JENNIFER GMELCH M.D.
Pediatrics
3600 NW SAMARITAN DR
CORVALLIS, OR 97330
Benton County (541) 768-5111

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Katelyn Mcmahan's NPI number?

The NPI number for Katelyn Mcmahan is 1942883541. It was assigned to this individual provider in the NPPES registry on April 30, 2021. The provider is also known as Katelyn Rose Ruark.

Where is Katelyn Mcmahan located?

Katelyn Mcmahan practices at 3600 NW Samaritan Dr, Corvallis, OR 97330. The listed phone number is (541) 768-4906.

What is Katelyn Mcmahan's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Katelyn Mcmahan enrolled in Medicare?

Yes. Katelyn Mcmahan is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Katelyn Mcmahan was last updated on June 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 58 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.