Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. John Mattathil John, LCSW

Individual provider Clinical Social Worker · NPI 1023291952

Mr. John Mattathil John, LCSW is a Clinical Social Worker in Brooklyn, New York. Qualified in 2004, 22 years ago. Practices with Mhh Psychology and Speech-Language Pathology Therapy Services PLLC, a 23-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
22
Licensed in
NY
In the registry since
2007
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

185 Montague St 2nd Fl
Brooklyn, NY 11201-3608 Not confirmed with CMS for 18 years — call before visiting
Phone: (718) 222-1701
Fax: (718) 222-1474
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 049236 (NY)

Record details

NPI number1023291952
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedDecember 13, 2007
Last updated in NPPESDecember 13, 2007

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice Mhh Psychology And Speech-Language Pathology Therapy Services Pllc — 23 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients19
Services billed 304 a service is one billed item, such as a visit, a test or a procedure
Average patient age51

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Mhh Psychology and Speech-Language Pathology Therapy Services PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 23 clinicians in the practice; 10 are shown here.

Other providers in Brooklyn