1. Home
  2. Directory
  3. New York
  4. Commack
  5. Counselor
  6. NPI Profile

DENISE MARIE DEMATTIA LMHC
NPI 1780227611
Counselor - Mental Health in Commack, NY

Active since October 23, 2019PECOS EnrolledAccepts Medicare Assignment
368 VETERANS MEMORIAL HWY STE 3, COMMACK, NY 11725(631) 533-0315(855) 752-5170 Get Directions Write a Review

NPPES record last updated: December 18, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 18, 2024, Sep 10, 2024, Apr 16, 2024 and 1 more (4 updates tracked since 2019).

About Denise Marie Demattia Lmhc NPPES

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

DENISE MARIE DEMATTIA LMHC (NPI 1780227611) is an individual mental health provider in Commack, New York, licensed in New York (007427) and active in the NPI registry since October 2019. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2012).

NPPES Registry Identity

NPI1780227611
Entity TypeIndividualFemale
Primary Taxonomy101YM0800X
Provider Legal NameDENISE MARIE DEMATTIACredential: LMHC
Location Address368 VETERANS MEMORIAL HWY STE 3Commack, NY 11725-4322
Mailing Address368 Veterans Memorial Hwy Ste 3Commack, NY 11725-4322 · (631) 533-0315 · Fax (855) 752-5170
Phone(631) 533-0315
Fax(855) 752-5170
Sole ProprietorYes
Medical School CMSOtherGraduated 2012
Enumeration DateOctober 23, 2019
Last NPPES UpdateDecember 18, 20244 updates tracked since enumeration
NPPES CertifiedDecember 18, 2024
✔ NPI 1780227611 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
License✔ Licensed in NY · 007427
368 VETERANS MEMORIAL HWY STE 3, Commack, NY 11725
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1380 N Broadway Ph EJericho, NY 11753-2198 · Phone (631) 533-0315 · Fax (855) 752-5170
Location 265 Air Park Dr Ste 10Ronkonkoma, NY 11779-7374 · Phone (631) 533-0315 · Fax (855) 752-5170

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Denise Marie Demattia Lmhc 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 ID2466993852
PECOS Enrollment IDI20240925003614
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.

Medicare Billing Reassignment

Medicare enrollment records show Denise Demattia reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sean Tendler Mental Health Counseling, P.C.
Same address
Mental Health
368 VETERANS MEMORIAL HWY STE 3
Commack, NY 11725
  • Reassigned Medicare billing, New York enrollment
  • Medicare enrollment name: Sean Tendler Mental Health Counseling PC
  • 26 clinicians in this Medicare group
NPI 1437626025 (631) 533-0315

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

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

FARIAL ISLAM MHC-LP
Counselor (Mental Health)
368 VETERANS MEMORIAL HWY STE 3
COMMACK, NY 11725
Suffolk County (631) 533-0315
HANNAH LEIGH VAN RONK LMHC
Counselor (Mental Health)
368 VETERANS MEMORIAL HWY STE 3
COMMACK, NY 11725
Suffolk County (631) 533-0315
KRISTI SEDGWICK LMHC
Counselor (Mental Health)
368 VETERANS MEMORIAL HWY STE 3
COMMACK, NY 11725
Suffolk County (631) 533-0315
IAN CONOR MEALIE LMHC
Counselor (Mental Health)
368 VETERANS MEMORIAL HWY STE 3
COMMACK, NY 11725
Suffolk County (631) 533-0315
ROBERT POPP LMHC
Counselor (Mental Health)
368 VETERANS MEMORIAL HWY STE 3
COMMACK, NY 11725
Suffolk County (631) 533-0315
ANGELA PAZ LMHC
Counselor (Mental Health)
368 VETERANS MEMORIAL HWY STE 3
COMMACK, NY 11725
Suffolk County (631) 533-0315
JENNIFER DAVIDSON LMHC
Counselor (Mental Health)
368 VETERANS MEMORIAL HWY STE 3
COMMACK, NY 11725
Suffolk County (631) 533-0315
IRENE VICTORIA BAUTISTA LMHC
Counselor (Mental Health)
368 VETERANS MEMORIAL HWY STE 3
COMMACK, NY 11725
Suffolk County (631) 533-0315

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 Denise Demattia's NPI number?

The NPI number for Denise Demattia is 1780227611. It was assigned to this individual provider in the NPPES registry on October 23, 2019.

Where is Denise Demattia located?

Denise Demattia practices at 368 Veterans Memorial Hwy Ste 3, Commack, NY 11725. The listed phone number is (631) 533-0315.

What is Denise Demattia's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Is Denise Demattia enrolled in Medicare?

Yes. Denise Demattia 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.

Which organization bills Medicare for Denise Demattia's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Denise Demattia reassigns Medicare benefits to Sean Tendler Mental Health Counseling, P.C. (Commack, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Denise Demattia's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Denise Demattia was last updated on December 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months 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.