1. Home
  2. Directory
  3. Massachusetts
  4. Waltham
  5. Counselor
  6. NPI Profile

MARK A DEYAB LICSW
NPI 1104907732
Counselor - Mental Health in Waltham, MA

Active since October 18, 2006PECOS Enrolled
20 HOPE AVE, G-05, WALTHAM, MA 02453(781) 799-3949(781) 899-6386 Get Directions Write a Review

NPPES record last updated: March 17, 2009. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mark A Deyab Licsw NPPES

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

MARK A DEYAB LICSW (NPI 1104907732) is an individual mental health provider in Waltham, Massachusetts, licensed in Massachusetts (111824) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1994).

NPPES Registry Identity

NPI1104907732
Entity TypeIndividualMale
Primary Taxonomy101YM0800X
Provider Legal NameMARK A DEYABCredential: LICSW
Location Address20 HOPE AVE, G-05Waltham, MA 02453-2721
Mailing Address34 Wareham St, Apt. 1Medford, MA 02155-6222 · (781) 799-3949
Phone(781) 799-3949
Fax(781) 899-6386
Sole ProprietorNo
Medical School CMSOtherGraduated 1994
Enumeration DateOctober 18, 2006
Last NPPES UpdateMarch 17, 2009
✔ NPI 1104907732 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 MA · 111824
20 HOPE AVE, Waltham, MA 02453
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark A Deyab Licsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8921065368
PECOS Enrollment IDI20041216000816
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 Mark Deyab reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mark Deyab Licsw Inc
12 mi
Clinical
1 W FOSTER ST, 3RD FLOOR
Melrose, MA 02176
  • Reassigned Medicare billing, Massachusetts enrollment
NPI 1750715108 (781) 799-3949

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.

WISSAM J KHOORY M.D.
Internal Medicine
20 HOPE AVE, SUITE G03
WALTHAM, MA 02453
Middlesex County (781) 893-4490
FIRST RESPONSE CLINICAL SERVICES, LLC
Clinic/Center (Medical Specialty)
20 HOPE AVE, SUITE 204
WALTHAM, MA 02453
Middlesex County (866) 604-0911
DR. GIGI GIRGIS M.D.
Psychiatry & Neurology (Neurology)
20 HOPE AVE, SUITE 203
WALTHAM, MA 02453
Middlesex County (781) 647-3550
DR. MARTIN RICHLER M.D.
Ophthalmology
20 HOPE AVE, SUITE 212
WALTHAM, MA 02453
Middlesex County (781) 891-1447
MARYBETH ANN MILLS RN
Specialist/Technologist Cardiovascular (Vascular Specialist)
20 HOPE AVE, SUITE 204
WALTHAM, MA 02453
Middlesex County (866) 604-0911
SOLOMON A. GABBAY, MD PC
Internal Medicine (Cardiovascular Disease)
20 HOPE AVE, SUITE 206
WALTHAM, MA 02453
Middlesex County (781) 894-2498
WISSAM KHOORY, MD,PC
Internal Medicine
20 HOPE AVE, SUITE G03
WALTHAM, MA 02453
Middlesex County (781) 893-4490
TWINBROOK SURGICAL ASSOCIATES
Surgery
20 HOPE AVE, STE 207
WALTHAM, MA 02453
Middlesex County (781) 893-6520

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 Mark Deyab's NPI number?

The NPI number for Mark Deyab is 1104907732. It was assigned to this individual provider in the NPPES registry on October 18, 2006.

Where is Mark Deyab located?

Mark Deyab practices at 20 Hope Ave G-05, Waltham, MA 02453. The listed phone number is (781) 799-3949.

What is Mark Deyab's specialty?

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

Is Mark Deyab enrolled in Medicare?

Yes. Mark Deyab is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mark Deyab's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Deyab reassigns Medicare benefits to Mark Deyab Licsw Inc (Melrose, MA). 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 Mark Deyab's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Deyab accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Mark Deyab as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mark Deyab was last updated on March 17, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years 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.