1. Home
  2. Directory
  3. Massachusetts
  4. Boston
  5. Radiology
  6. NPI Profile

ARIEL SEITZ KNISS
NPI 1851910426
Radiology - Diagnostic Radiology in Boston, MA

Active since April 13, 2020PECOS EnrolledAccepts Medicare Assignment
DEPARTMENT OF RADIOLOGY, AUS 210, 55 FRUIT STREET, BOSTON, MA 02114(617) 726-2000 Get Directions Write a Review

NPPES record last updated: June 9, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jun 9, 2025, Jul 16, 2021, Apr 13, 2020 (3 updates tracked since 2020).

About Ariel Seitz Kniss NPPES

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

ARIEL SEITZ KNISS (NPI 1851910426) is an individual diagnostic radiology provider in Boston, Massachusetts, licensed in Massachusetts (1022613) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains a secondary practice location in Nashville.

NPPES Registry Identity

NPI1851910426
Entity TypeIndividualFemale
Primary Taxonomy2085R0202X
Provider Legal NameARIEL SEITZ KNISS
Location AddressDEPARTMENT OF RADIOLOGY, AUS 210, 55 FRUIT STREETBoston, MA 02114
Mailing AddressDepartment Of Radiology, Aus 210, 55 Fruit StreetBoston, MA 02114
Phone(617) 726-2000
Sole ProprietorNo
Medical School CMSVanderbilt University School Of MedicineGraduated 2020
Enumeration DateApril 13, 2020
Last NPPES UpdateJune 9, 20253 updates tracked since enumeration
NPPES CertifiedJune 9, 2025
✔ NPI 1851910426 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in MA · 1022613
Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

DEPARTMENT OF RADIOLOGY, AUS 210, Boston, MA 02114
Open in Google Maps ↗

Other Names 1

Former Name (1)Ariel Seitz Kniss-james

Secondary Practice Location 1

Location 11161 21st Ave S, CCC-4322AA MCNNashville, TN 37232-2730 · Phone (615) 343-6642

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ariel Seitz Kniss 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 ID7810312725
PECOS Enrollment IDI20250516002294
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.

Hospital Affiliations CMS Care Compare 2

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

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220071
Location55 Fruit StreetBoston, MA 02114 · Suffolk County
Emergency services Birthing friendly

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220101
Location2014 Washington StreetNewton, MA 02462 · Middlesex County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 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
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$78.84 typical visit price
range $21.07 – $155.29
Typical copayment $19.71 (range $5.26 – $38.82)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Kniss's NPI number?

The NPI number for Ariel Kniss is 1851910426. It was assigned to this individual provider in the NPPES registry on April 13, 2020. The provider is also known as Ariel Seitz Kniss-James.

Where is Ariel Kniss located?

Ariel Kniss practices at Department Of Radiology, Aus 210 55 Fruit Street, Boston, MA 02114. The listed phone number is (617) 726-2000.

What is Ariel Kniss's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Ariel Kniss enrolled in Medicare?

Yes. Ariel Kniss 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.

Is Ariel Kniss affiliated with any hospitals?

According to CMS data, Ariel Kniss is affiliated with Massachusetts General Hospital and Newton-Wellesley Hospital.

When was this NPI record last updated?

The NPPES record for Ariel Kniss was last updated on June 9, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.