Psychologist | General Psychology | 37+ years experience

Dr. Mary Sean O'halloran, LP

1751 Hover St, Ste B4, Longmont, Colorado, 80501-7181

About Dr. Mary Sean O'halloran

Dr. Mary Sean O'halloran is a psychologist based in Longmont, Colorado with 37 years of experience in General Psychology. She completed her graduation in 1989. She accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of Dr. Mary Sean O'halloran is 2218 for General Psychology in Colorado. Her current practice location is 1751 Hover St, Ste B4, Longmont. Patients can contact her at 720-635-0755 or can fax her at 303-223-3306. Dr. Mary Sean O'halloran, LP, specializes in General Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1477123511.

Dr. Mary Sean O'halloran is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She can diagnose and treat 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 by psycheducational evaluation, therapy, remediation, and consultation.

Practice Information

Dr. Mary Sean O'halloran's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Dr. Mary Sean O'halloran
Specialization General Psychology
Credentials LP
Accepts Medicare Assignment Yes
Experience 37+ years
Graduation Year 1989
Gender Female
Practice Address: 1751 Hover St, Ste B4
Longmont, CO - 80501-7181
Fax 303-223-3306

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

PAC ID 7315344975
Enrollment ID I20210923002733
NPI Number1477123511
NPI Enumeration Date: 30 Jun, 2021
NPI Last Update On: 20 Sep, 2021

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Dr. Mary Sean O'halloran are as mentioned below.

License NumberSpecializationStateStatus
2218General Psychology ColoradoPrimary

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Dr. Mary Sean O'halloran
525 Bowen St,
Longmont, CO - 80501-5333
Phone: 720-635-0755

Book an Appointment with Dr. Mary Sean O'halloran

To schedule an appointment, contact Dr. Mary Sean O'halloran at 1751 Hover St, Ste B4, Longmont, Colorado or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Mary Sean O'halloran:

Dr. Mary Sean O'halloran is a psychologist specializing in General Psychology. She is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She can diagnose and treat 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 by psycheducational evaluation, therapy, remediation, and consultation.

Dr. Mary Sean O'halloran has approximately 37 years of experience in General Psychology.

Yes, Dr. Mary Sean O'halloran accepts Medicare assignment, meaning the provider participates in Medicare and accepts Medicare-approved amounts for eligible services.

Yes, Dr. Mary Sean O'halloran is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Dr. Mary Sean O'halloran practices at 1751 Hover St, Ste B4, Longmont, Colorado, 80501-7181.

To schedule an appointment with Dr. Mary Sean O'halloran, please contact the office at 720-635-0755.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.