Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Colorectal Surgery (Proctology)

Mohammad Ali Abbass, MD

Sees patients in Uniondale, NY · New York, NY · Basking Ridge, NJ … · New York, New Jersey

Summary

Mohammad Ali Abbass, MD (Colorectal Surgery (Proctology)) is enrolled with Medicare at 7 practice locations in Uniondale, NY, New York, NY and Basking Ridge, NJ and other places. NPI 1730508052. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Mohammad Ali Abbass, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Colorectal Surgery (Proctology)Primary specialty
YesAccepts Medicare assignment
YesOffers telehealth
17Years since medical school (graduated 2009)
MaleGender (as listed)
MSKCC Surgery GroupGroup practice (+4 more)

Quick answers

Where does Mohammad Ali Abbass see patients?
Medicare's clinician data lists 7 practice locations, including Uniondale, NY, New York, NY and Basking Ridge, NJ. Call before your visit to confirm the address.
What is Mohammad Ali Abbass's specialty?
Medicare lists Colorectal Surgery (Proctology) as the primary specialty, and also Medical Genetics and Genomics.
Does Mohammad Ali Abbass accept Medicare assignment?
Yes. Medicare's clinician data says Mohammad Ali Abbass accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Mohammad Ali Abbass offer telehealth?
Medicare's clinician data says Mohammad Ali Abbass offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Mohammad Ali Abbass?
(212) 639-2000, as listed in official Medicare / NPI Registry data.
What is Mohammad Ali Abbass's NPI number?
1730508052. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Mohammad Ali Abbass is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.

Group practices

Medicare enrollment lists Mohammad Ali Abbass as a member of these groups (CMS data updated 2026-10-02).

  • MSKCC Surgery Group369 clinicians in the group
  • Memorial Sloan Kettering Cancer Center at Basking Ridge New Jersey229 clinicians in the group
  • MSK Nassau98 clinicians in the group
  • Memorial Medical Care PC13 clinicians in the group
  • Memorial Clinical Genetics Group10 clinicians in the group

Specialties

Find other Colorectal Surgery (Proctology) doctors in New York →

Other colorectal surgeons in New York

Clinicians with the same Medicare primary specialty in New York — not a recommendation.

All colorectal surgeons in New York →

Clinician information

CredentialMD
Graduation year2009
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1730508052
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians