Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. WILLIAM ORR HAHN PHD
NPI 1568426765
Psychologist - School in New Kensington, PA

Active since April 14, 2006PECOS Enrolled
365 FREEPORT ST, NEW KENSINGTON, PA 15068(724) 337-0066(724) 337-0745 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Dr. William Orr Hahn Phd NPPES

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

DR. WILLIAM ORR HAHN PHD (NPI 1568426765) is an individual school provider in New Kensington, Pennsylvania, licensed in Pennsylvania (PS003428L) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Pittsburgh School Of Medicine (1984).

NPPES Registry Identity

NPI1568426765
Entity TypeIndividualMale
Primary Taxonomy103TS0200X
Provider Legal NameDR. WILLIAM ORR HAHNCredential: PHD
Location Address365 FREEPORT STNew Kensington, PA 15068-6014
Mailing Address365 Freeport StNew Kensington, PA 15068-6014 · (724) 337-0066 · Fax (724) 337-0745
Fax(724) 337-0745
Sole ProprietorNo
Medical School CMSUniversity Of Pittsburgh School Of MedicineGraduated 1984
Enumeration DateApril 14, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
NPI 1568426765 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 6

Primary SpecialtyPsychologist · SchoolBehavioral Health & Social Service Providers
Taxonomy Code103TS0200X
License Licensed in PA · PS003428L
Definition

A psychologist whose specialty is concerned with the science and practice of psychology with children, youth, families; learners of all ages; and the schooling process. The basic education and training of school psychologists prepares them to provide a range of psychological diagnosis, assessment, intervention, prevention, health promotion, and program development and evaluation services with a special focus on the developmental processes of children and youth within the context of schools, families and other systems. School psychologists are prepared to intervene at the individual and system level, and develop, implement, and evaluate preventive programs. In these efforts, they conduct ecologically valid assessments and intervene to promote positive learning environments within which children and youth from diverse backgrounds to ensure that all have equal access to effective educational and psychological services that promote healthy development

Also ListedClinical NeuropsychologistTaxonomy 103G00000X · License PS003428L (PA)
Also ListedPsychologistTaxonomy 103T00000X · License PS003428L (PA)
Also ListedPsychologist · Cognitive & BehavioralTaxonomy 103TB0200X · License PS003428L (PA)
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License PS003428L (PA)
Also ListedPsychologist · CounselingTaxonomy 103TC1900X · License PS003428L (PA)
365 FREEPORT ST, New Kensington, PA 15068

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. William Orr Hahn Phd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2668568486
PECOS Enrollment IDI20071010000008
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.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychiatric diagnostic evaluation 90791
A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.
129 services129 patients
Psychotherapy, 30 minutes 90832
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 30-minute session, the therapist helps you explore feelings, thoughts, and behaviors to better understand yourself and manage life's challenges.
50 services38 patients

Other Providers at the Same Location NPPES

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

Psychologist
365 FREEPORT ST
NEW KENSINGTON, PA 15068

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 William Hahn's NPI number?

The NPI number for William Hahn is 1568426765. It was assigned to this individual provider in the NPPES registry on April 14, 2006.

Where is William Hahn located?

William Hahn practices at 365 Freeport St, New Kensington, PA 15068. The listed phone number is (724) 337-0066.

What is William Hahn's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in School, with taxonomy code 103TS0200X.

Is William Hahn enrolled in Medicare?

Yes. William Hahn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for William Hahn was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.