JONATHAN PETER NASS (M.D.) – Gastroenterology Physician, NPI 1558587998
Gastroenterology Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
829 GASTROENTEROLOGY in MA
Provider Addresses for JONATHAN PETER NASS (M.D.)
1085 MAIN ST
SOUTH WEYMOUTH, MA 021901547
Phone: (781) 331-2922
Fax: (781) 335-5702
Mailing address matches the actual address.
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.
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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: 2012-10-03
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20121003000303 | I | Gastroenterology | MA | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 161 | 91 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 124 | 118 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 98 | 93 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 87 | 87 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 80 | 78 | $0 |
Insurance plans in this area (ZIP 02190)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | MA | |
| - | MA | |
| - | MA | |
| Nurse Practitioner | MA | |
| U R O L O G Y | MA | |
| Nurse Practitioner | MA | |
| Internal Medicine | MA | |
| Nurse Practitioner | MA | |
| Physician Assistant | MA | |
| Physician Assistant | MA |
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