JOHN ANGELO GNASSI (MD) – Family Medicine Physician, NPI 1629066105
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,251 HOSPITALIST in MA
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Provider Addresses for JOHN ANGELO GNASSI (MD)
CHA Everett Hospital, 103, Garland Street, Glendale, Everett, Middlesex County, Massachusetts, 02149, United States
EVERETT, MA 021495066
Phone: (617) 389-6270
Type: Location
9, White Place, Brookline, Norfolk County, Massachusetts, 02445, United States
BROOKLINE, MA 024457614
Phone: (617) 975-0211
Type: Mailing
236 RAINBOW DR # 13625
LIVINGSTON, TX 773992036
Phone: (857) 210-3900
Type: Mailing
103 Garland St
Everett, MA 021495066
Phone: (617) 389-6270
Type: Location
12033 AGENCY RD
PARKER, AZ 853447718
Phone: (928) 669-2137
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2021-01-19
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050707000337 | I | Family Practice | MA | TBD |
| I20210119001789 | I | Hospitalist | TX | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 02149)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | HI | |
| - | NJ | |
| Physician Assistant | WA | |
| - | PR | |
| - | MT | |
| - | OR | |
| - | PA | |
| - | MT | |
| Family Practice | MT | |
| Nurse Practitioner | MT |
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