DR. JOHN WILLIAM MACHALABA PSY.D.
NPI 1467076315
Psychologist in Philadelphia, PA

Active since June 05, 2020Opted out of Medicare · through Aug 21, 2027
123 CHESTNUT ST STE 304, PHILADELPHIA, PA 19106(215) 399-4128 Get Directions Write a Review

NPPES record last updated: June 10, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 29, 2020, Jun 5, 2020 (2 updates tracked since 2020).

About Dr. John William Machalaba Psy.d. NPPES

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

DR. JOHN WILLIAM MACHALABA PSY.D. (NPI 1467076315) is an individual psychologist in Philadelphia, Pennsylvania and active in the NPI registry since June 2020. He has opted out of Medicare through August 21, 2027.

NPPES Registry Identity

NPI1467076315
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameDR. JOHN WILLIAM MACHALABACredential: PSY.D.
Location Address123 CHESTNUT ST STE 304Philadelphia, PA 19106-3059
Mailing Address128 Chestnut St Ste 303Philadelphia, PA 19106-3024 · (215) 399-4128
Sole ProprietorNo
Enumeration DateJune 5, 2020
Last NPPES UpdateJune 10, 20262 updates tracked since enumeration
NPPES CertifiedJune 10, 2026
NPI 1467076315 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.
123 CHESTNUT ST STE 304, Philadelphia, PA 19106

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Opted out of Medicare

Dr. John William Machalaba Psy.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from August 21, 2023 through August 21, 2027.

Opt-Out Effective DateAugust 21, 2023
Opt-Out In Effect ThroughAugust 21, 2027Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES 15

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

Social Worker (Clinical)
123 CHESTNUT ST STE 304
PHILADELPHIA, PA 19106
Social Worker (Clinical)
123 CHESTNUT ST STE 304
PHILADELPHIA, PA 19106
Counselor
123 CHESTNUT ST STE 304
PHILADELPHIA, PA 19106
Social Worker
123 CHESTNUT ST STE 304
PHILADELPHIA, PA 19106
Psychologist (Clinical)
123 CHESTNUT ST STE 304
PHILADELPHIA, PA 19106
Social Worker (Clinical)
123 CHESTNUT ST STE 304
PHILADELPHIA, PA 19106
Counselor
123 CHESTNUT ST STE 304
PHILADELPHIA, PA 19106
Social Worker (Clinical)
123 CHESTNUT ST STE 304
PHILADELPHIA, PA 19106

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 John Machalaba's NPI number?

The NPI number for John Machalaba is 1467076315. It was assigned to this individual provider in the NPPES registry on June 5, 2020.

Where is John Machalaba located?

John Machalaba practices at 123 Chestnut St Ste 304, Philadelphia, PA 19106. The listed phone number is (215) 399-4128.

What is John Machalaba's specialty?

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

Is John Machalaba enrolled in Medicare?

No. John Machalaba has opted out of Medicare through August 21, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for John Machalaba was last updated on June 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 55 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.