SISILIA THOMAS AGNP-C
NPI 1518842079
Nurse Practitioner - Gerontology in Boston, MA

Q: What is Sisilia Thomas's NPI number?

The NPI number for Sisilia Thomas is 1518842079. It was assigned to this individual provider in the NPPES registry on August 6, 2025. The provider is also known as Sisy John.

Q: What is Sisilia Thomas's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.

Q: When was this NPI record last updated?

The NPPES record for Sisilia Thomas was last updated on May 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.

Active since August 06, 2025PECOS Enrolled

830 HARRISON AVENUE, 3RD FL, MOAKLEY BLDG, BOSTON, MA 02118(617) 638-6428(617) 638-5756 Get Directions Write a Review

NPPES record last updated: May 20, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 20, 2026, Aug 6, 2025 (2 updates tracked since 2025).

On this page

About Sisilia Thomas Agnp-c NPPES

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

SISILIA THOMAS AGNP-C (NPI 1518842079) is an individual gerontology provider in Boston, Massachusetts, licensed in Massachusetts (RN2263665) and active in the NPI registry since August 2025. She is enrolled in Medicare PECOS and is a graduate of University Of Massachusetts Medical School (2025).

NPPES Registry Identity

NPI1518842079

Entity TypeIndividualFemale

Primary Taxonomy363LG0600X

Provider Legal NameSISILIA THOMASCredential: AGNP-C

Location Address830 HARRISON AVENUE, 3RD FL, MOAKLEY BLDGBoston, MA 02118-2905

Mailing Address960 Massachusetts Ave, Fl 2Boston, MA 02118-2690

Phone(617) 638-6428

Fax(617) 638-5756

Sole ProprietorNo

Medical School CMSUniversity Of Massachusetts Medical SchoolGraduated 2025

Enumeration DateAugust 6, 2025

Last NPPES UpdateMay 20, 20262 updates tracked since enumeration

NPPES CertifiedMay 20, 2026

✔ NPI 1518842079 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · GerontologyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LG0600X

License✔ Licensed in MA · RN2263665

830 HARRISON AVENUE, 3RD FL, Boston, MA 02118

Open in Google Maps ↗

Other Names 1

Former Name (1)Sisy John

Other Identifiers 1

Medicaid110225757AMA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sisilia Thomas Agnp-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3678048543

PECOS Enrollment IDI20260408001730

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02118 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

$111.18 typical visit price

range $21.07 – $155.29

Typical copayment $27.79 (range $5.26 – $38.82)

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.

DR. GEOFFREY R. OXNARD MD

Internal Medicine (Medical Oncology)