Doctor profile · Federal record
Dr. Jonathan Nass, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Gastroenterology Physician · South Weymouth, MA
- NPI 1558587998
- Accepts Medicare
- 21 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1085 Main St
South Weymouth, MA 021901547
(781) 331-2922
fax (781) 335-5702
Credentials & registration
- NPI registered
- April 2007 — 19 yrs on file
- Profile last updated
- December 18, 2019
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (3)
- Massachusetts #252551 · Rhode Island #LP00455 · Louisiana #MD.202069
- Medicaid (2)
- LA #1106887 · MS #05750222
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1558587998. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
817
Distinct HCPCS
10
Medicare allowed
$106,216
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 161 | 91 | $84 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 124 | 118 | $138 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 98 | 93 | $265 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 87 | 87 | $116 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 80 | 78 | $114 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 40 | 35 | $95 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 36 | 30 | $136 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 32 | 32 | $170 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 30 | 30 | $130 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 23 | 23 | $178 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 51. This provider delivers 16× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
146
Patients
27
Total drug cost
$29,367
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 65 | 27 | $1,355 |
| Linzess (Linaclotide) | Brand | 29 | 0 | $18,180 |
| Omeprazole | Generic | 19 | 0 | $454 |
| Adefovir Dipivoxil | Generic | 11 | 0 | $8,128 |
| Prednisone | Generic | 11 | 0 | $112 |
| Scopolamine | Generic | 11 | 0 | $1,137 |
Hospital affiliations
Frequently asked questions
What is Dr. Jonathan Nass's medical specialty?
Dr. Jonathan Nass practices Gastroenterology Physician in South Weymouth, MA.
Where does Dr. Jonathan Nass practice?
Dr. Jonathan Nass practices at 1085 Main St, South Weymouth, MA 021901547. Office phone: 7813312922.
What is Dr. Jonathan Nass's NPI?
Dr. Jonathan Nass's National Provider Identifier (NPI) is 1558587998, issued by NPPES.
Does Dr. Jonathan Nass accept Medicare assignment?
Yes. Dr. Jonathan Nass accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jonathan Nass commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385). Source: CMS Medicare Physician & Other Practitioners file.