KNOWLTON, O'NEILL & ASSOCIATES, P.C.
NPI 1538198759
Psychologist in West Fargo, ND

Active since July 01, 2006
1401 13TH AVE E, WEST FARGO, ND 58078(701) 364-0060(701) 364-0065 Get Directions Write a Review

NPPES record last updated: March 19, 2024. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Knowlton, O'neill & Associates, P.c. NPPES

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

KNOWLTON, O'NEILL & ASSOCIATES, P.C. (NPI 1538198759) is a healthcare organization registered as a psychologist in West Fargo, North Dakota and active in the NPI registry since July 2006. The organization lists Holly Hegstad, President/clinical Psychologist, as its authorized official.

NPPES Registry Identity

NPI1538198759
Entity TypeOrganization
Primary Taxonomy103T00000X
Legal Business NameKNOWLTON, O'NEILL & ASSOCIATES, P.C.
Location Address1401 13TH AVE EWest Fargo, ND 58078-3468
Mailing Address1401 13th Ave EWest Fargo, ND 58078-3468 · (701) 364-0060 · Fax (701) 364-0065
Fax(701) 364-0065
Organization SubpartNo
Authorized OfficialHolly HegstadPresident/clinical Psychologist · (701) 364-0060
Enumeration DateJuly 1, 2006
Last NPPES UpdateMarch 19, 2024
NPPES CertifiedMarch 19, 2024
✔ NPI 1538198759 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
1401 13TH AVE E, West Fargo, ND 58078

Other Identifiers 5

Medicaid010742500MN
Other266S2KNMN · Bcbs-mn Group #
Other85532Healthpartners Group #
Other056356001ND · Bcbs-nd Clinic #
Medicaid12045ND

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Knowlton, O'neill & Associates, P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

12

Medicare enrollment records show 12 clinicians reassign Medicare billing to Knowlton, O'neill & Associates, P.C., which bills Medicare for the services they deliver. Of these, 4 practice at this address and 12 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 5

Clinical Psychologist7
Mental Health Counselor2
Clinical Social Worker1
Nurse Practitioner1
Psychiatry1

Clinicians, nearest first (12)

Nurse Practitioner
NPI 1093367799
1401 13TH AVE E
West Fargo, ND 58078
(701) 364-0060
✔ PECOS✔ Accepts MedicareSame address
Clinical Psychologist
NPI 1376560045
1401 13TH AVE E
West Fargo, ND 58078
(701) 364-0060
✔ PECOS✔ Accepts MedicareSame address
Clinical Psychologist
NPI 1336711068
1401 13TH AVE E
West Fargo, ND 58078
(701) 364-0060
✔ PECOS✔ Accepts MedicareSame address
Clinical Psychologist
NPI 1720058852
1401 13TH AVE E
West Fargo, ND 58078
(701) 364-0060
✔ PECOS✔ Accepts MedicareSame address
Mental Health Counselor
NPI 1255157160
1401 13TH AVE E
West Fargo, ND 58078
(701) 364-0060
✔ PECOS✔ Accepts Medicare2.3 mi
Clinical Psychologist
NPI 1083056592
1401 13TH AVE E
West Fargo, ND 58078
(701) 364-0060
✔ PECOS2.3 mi
Clinical Psychologist
NPI 1073682902
1401 13TH AVE E
West Fargo, ND 58078
(701) 364-0060
✔ PECOS✔ Accepts Medicare2.3 mi
Mental Health Counselor
NPI 1417311465
2624 9TH AVE S
Fargo, ND 58103
(701) 298-4500
✔ PECOS✔ Accepts Medicare2.6 mi
Clinical Psychologist
NPI 1467555078
510 4 ST S
Fargo, ND 58103
(701) 476-7800
✔ PECOS✔ Accepts Medicare2.6 mi
Clinical Psychologist
NPI 1437662640
1301 8TH ST S
Moorhead, MN 56560
(701) 234-3100
✔ PECOS✔ Accepts Medicare5.1 mi
Psychiatry
NPI 1831117480
2101 ELM STREET N
Fargo, ND 58102
(701) 239-3700
✔ PECOS5.8 mi
Clinical Social Worker
NPI 1962739904
1547 30TH AVE S
Moorhead, MN 56560
(218) 287-4338
✔ PECOS✔ Accepts Medicare5.9 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Knowlton, O'neill & Associates, P.C.'s NPI number?

The NPI number for Knowlton, O'neill & Associates, P.C. is 1538198759. It was assigned to this organization in the NPPES registry on July 1, 2006.

Where is Knowlton, O'neill & Associates, P.C. located?

Knowlton, O'neill & Associates, P.C. is located at 1401 13th Ave E, West Fargo, ND 58078. The listed phone number is (701) 364-0060.

What is Knowlton, O'neill & Associates, P.C.'s specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Knowlton, O'neill & Associates, P.C. enrolled in Medicare?

Yes. Knowlton, O'neill & Associates, P.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Knowlton, O'neill & Associates, P.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 12 clinicians in 5 Medicare specialties reassign their Medicare billing to Knowlton, O'neill & Associates, P.C.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Clinical Psychologist (7), Mental Health Counselor (2) and Clinical Social Worker (1). Of these, 4 practice at this address and 12 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Knowlton, O'neill & Associates, P.C. accept?

Health plans from Blue Cross Blue Shield of North Dakota, Medica and Sanford Health Plan list Knowlton, O'neill & Associates, P.C. as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Knowlton, O'neill & Associates, P.C. was last updated on March 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.