1. Home
  2. Directory
  3. New York
  4. New York New York
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ARIEL BAR-MASHIAH
NPI 1871120345
Internal Medicine - Gastroenterology in New York, NY

Active since March 25, 2020PECOS Enrolled
505 E 70TH ST, NEW YORK, NY 10021(212) 746-2900 Get Directions Write a Review

NPPES record last updated: August 27, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 27, 2026, Mar 25, 2020 (2 updates tracked since 2020).

About Ariel Bar-mashiah NPPES

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

ARIEL BAR-MASHIAH (NPI 1871120345) is an individual gastroenterology provider in New York, New York, licensed in New York (342359-01) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, is affiliated with New York-presbyterian Hospital, and is a graduate of Icahn School Of Medicine At Mount Sinai (2020).

NPPES Registry Identity

NPI1871120345
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameARIEL BAR-MASHIAH
Location Address505 E 70TH STNew York, NY 10021-4872
Mailing Address505 E 70th StNew York, NY 10021-4872 · (212) 746-2900
Phone(212) 746-2900
Sole ProprietorNo
Medical School CMSIcahn School Of Medicine At Mount SinaiGraduated 2020
Enumeration DateMarch 25, 2020
Last NPPES UpdateAugust 27, 20262 updates tracked since enumeration
NPPES CertifiedAugust 27, 2026
✔ NPI 1871120345 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in NY · 342359-01
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
505 E 70TH ST, New York, NY 10021
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ariel Bar-mashiah is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1153894431
PECOS Enrollment IDI20260627000397
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 Ariel Bar-mashiah reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Weill Medical College Of Cornell
0.1 mi
Gastroenterology
525 E 68TH ST
New York, NY 10021
  • Reassigned Medicare billing, New York enrollment
  • 94 clinicians in this Medicare group
NPI 1932143815 (212) 746-4479

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

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

New York-Presbyterian Hospital

Acute Care Hospitals · New York, NY
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330101
Location525 East 68th StreetNew York, NY 10065 · New York County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10021 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$150.24 typical visit price
range $65.69 – $198.19
Typical copayment $37.56 (range $16.42 – $49.54)
Most-billed visit code 99204
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

AJAYRAM VIVEK ULLAL M.D.
Student in an Organized Health Care Education/Training Program
505 E 70TH ST, 505 E 70TH ST
NEW YORK, NY 10021
New York County (212) 746-3587
LAURA NAVARRO
Student in an Organized Health Care Education/Training Program
505 E 70TH ST
NEW YORK, NY 10021
New York County (212) 746-2900
MISS RACHEL BETH KAPLAN RN, CPNP
Nurse Practitioner (Pediatrics)
505 E 70TH ST, BOX 279
NEW YORK, NY 10021
New York County (646) 962-4303
MR. ALEXANDER PAUL AJETO
Internal Medicine
505 E 70TH ST
NEW YORK, NY 10021
New York County (212) 746-4007
ZACHARY FALK MD
Student in an Organized Health Care Education/Training Program
505 E 70TH ST
NEW YORK, NY 10021
New York County (212) 746-2900
DR. JONES TREVOR NAUSEEF MD PHD
Internal Medicine (Medical Oncology)
505 E 70TH ST
NEW YORK, NY 10021
New York County (212) 746-2942
KUMAR NAIR MD
Internal Medicine
505 E 70TH ST
NEW YORK, NY 10021
New York County (212) 746-2942
CLARISSA ANDRE
Internal Medicine
505 E 70TH ST
NEW YORK, NY 10021
New York County (212) 746-9663

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 Ariel Bar-mashiah's NPI number?

The NPI number for Ariel Bar-mashiah is 1871120345. It was assigned to this individual provider in the NPPES registry on March 25, 2020.

Where is Ariel Bar-mashiah located?

Ariel Bar-mashiah practices at 505 E 70th St, New York, NY 10021. The listed phone number is (212) 746-2900.

What is Ariel Bar-mashiah's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Ariel Bar-mashiah enrolled in Medicare?

Yes. Ariel Bar-mashiah is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Ariel Bar-mashiah's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ariel Bar-mashiah reassigns Medicare benefits to Weill Medical College Of Cornell (New York, 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 Ariel Bar-mashiah's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Ariel Bar-mashiah affiliated with any hospitals?

According to CMS data, Ariel Bar-mashiah is affiliated with New York-Presbyterian Hospital.

When was this NPI record last updated?

The NPPES record for Ariel Bar-mashiah was last updated on August 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 59 days 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.