Psychologist | Clinical Psychology

Dr. Mark Loesch, PH.D.

75 State St Fl 26, Boston, Massachusetts, 02109-1827

About Dr. Mark Loesch

Dr. Mark Loesch is a psychologist based in Boston, Massachusetts who is specialized in Clinical Psychology. His current practice location is 75 State St Fl 26, Boston. Patients can contact him at 617-204-3500. Dr. Mark Loesch, PH.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1215357587.

Dr. Mark Loesch is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). His main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that he can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

Dr. Mark Loesch'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. Mark Loesch
Specialization Clinical Psychology
Credentials PH.D.
Gender Male
Practice Address: 75 State St Fl 26,
Boston, MA - 02109-1827

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.

NPI Number1215357587
NPI Enumeration Date: 24 Apr, 2014
NPI Last Update On: 22 Feb, 2022

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. Mark Loesch are as mentioned below.

License NumberSpecializationStateStatus
General Psychology CaliforniaPrimary
29157Clinical Psychology CaliforniaSecondary

Mailing Address

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

Dr. Mark Loesch
1840 S Gaffey St, # 44
San Pedro, CA - 90731-5324

Book an Appointment with Dr. Mark Loesch

To schedule an appointment, contact Dr. Mark Loesch at 75 State St Fl 26, Boston, Massachusetts or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Mark Loesch:

Dr. Mark Loesch is a psychologist specializing in General Psychology. He is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, he performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. He 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.

Yes, Dr. Mark Loesch 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. Mark Loesch practices at 75 State St Fl 26, Boston, Massachusetts, 02109-1827.

To schedule an appointment with Dr. Mark Loesch, please contact the office at 617-204-3500.

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