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DR. JOHN MASTROPAOLO PH.D.
NPI 1427409002
Psychologist - Cognitive & Behavioral in Chevy Chase, MD

Active since June 25, 2016Opted out of Medicare · through Apr 1, 2027
4701 WILLARD AVE, SUITE 230, CHEVY CHASE, MD 20815(301) 755-7003 Get Directions Write a Review

NPPES record last updated: June 25, 2016. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. John Mastropaolo Ph.d. NPPES

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

DR. JOHN MASTROPAOLO PH.D. (NPI 1427409002) is an individual cognitive & behavioral provider in Chevy Chase, Maryland, licensed in Maryland (02476) and active in the NPI registry since June 2016. He has opted out of Medicare through April 1, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1427409002
Entity TypeIndividualMale
Primary Taxonomy103TB0200X
Provider Legal NameDR. JOHN MASTROPAOLOCredential: PH.D.
Location Address4701 WILLARD AVE, SUITE 230Chevy Chase, MD 20815-4643
Mailing Address606 Notley RdSilver Spring, MD 20904-6221 · (301) 755-7003
Phone(301) 755-7003
Sole ProprietorYes
Enumeration DateJune 25, 2016
✔ NPI 1427409002 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · Cognitive & BehavioralBehavioral Health & Social Service Providers
Taxonomy Code103TB0200X
License✔ Licensed in MD · 02476
Definition
A psychologist who reflects an experimental-clinical approach distinguished by use of principles of human learning and development and theories of cognitive processing to promote meaningful change in maladaptive human behavior and thinking.
4701 WILLARD AVE, Chevy Chase, MD 20815
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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 Mastropaolo Ph.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 April 1, 2017 through April 1, 2027.

Opt-Out Effective DateApril 1, 2017
Opt-Out In Effect ThroughApril 1, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES 19

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

ANGELA SEGAL PH.D
Psychologist
4701 WILLARD AVE, SUITE 227
CHEVY CHASE, MD 20815
Montgomery County (301) 219-5917
MOLLY MCDONALD
Social Worker
4701 WILLARD AVE, 1119
CHEVY CHASE, MD 20815
Montgomery County (202) 344-7349
DR. THOMAS L APPLIN MD
Psychiatry & Neurology (Child & Adolescent Psychiatry)
4701 WILLARD AVE, 623
CHEVY CHASE, MD 20815
Montgomery County (301) 718-1975
DR. JOSEPH HERMAN HOCHHEISER M.D.
Psychiatry & Neurology (Child & Adolescent Psychiatry)
4701 WILLARD AVE, 233
CHEVY CHASE, MD 20815
Montgomery County (301) 657-2200
DR. NEIL H COHEN DDS
Dentist (General Practice)
4701 WILLARD AVE, SUITE 106
CHEVY CHASE, MD 20815
Montgomery County (301) 654-7760
PAUL GEORGE PRUNIER M.D.
Psychiatry & Neurology (Child & Adolescent Psychiatry)
4701 WILLARD AVE, SUITE 210
CHEVY CHASE, MD 20815
Montgomery County (301) 656-2767
DR. JAMES MARK SYDNOR-GREENBERG PH.D.
Psychologist
4701 WILLARD AVE, SUITE 419
CHEVY CHASE, MD 20815
Montgomery County (703) 536-5405
DR. LUKE FRANCIS GRANDE MD
Psychiatry & Neurology (Psychiatry)
4701 WILLARD AVE, 204
CHEVY CHASE, MD 20815
Montgomery County (301) 652-3462

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 Mastropaolo's NPI number?

The NPI number for John Mastropaolo is 1427409002. It was assigned to this individual provider in the NPPES registry on June 25, 2016.

Where is John Mastropaolo located?

John Mastropaolo practices at 4701 Willard Ave Suite 230, Chevy Chase, MD 20815. The listed phone number is (301) 755-7003.

What is John Mastropaolo's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Cognitive & Behavioral, with taxonomy code 103TB0200X.

Is John Mastropaolo enrolled in Medicare?

No. John Mastropaolo has opted out of Medicare through April 1, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for John Mastropaolo was last updated on June 25, 2016. NPI Profile syncs with the weekly NPPES data releases published by CMS.