Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Ariel Warren

Individual provider Primary Care Nurse Practitioner · NPI 1538661582

Ariel Warren is a Nurse Practitioner in Belmont, Massachusetts. Qualified in 2017, 9 years ago. Practices with Mass General Brigham Medical Group Suburban Massachusetts Inc, a 532-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
9
Licensed in
NY
In the registry since
2018

Practice location Address checks out

115 Mill St
Belmont, MA 02478-1048
Phone: (617) 855-2118
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Primary Care Nurse Practitioner (primary) Taxonomy 363LP2300X · Licence F308579-1 (NY)

Record details

NPI number1538661582
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedMarch 6, 2018
Last updated in NPPESJuly 10, 2026
Certification dateJuly 10, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Mass General Brigham Medical Group Suburban Massachusetts Inc — 532 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients30
Services billed 138 a service is one billed item, such as a visit, a test or a procedure
Average patient age83

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Mass General Brigham Medical Group Suburban Massachusetts Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 532 clinicians in the practice; 12 are shown here.