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Edit this profileAt a glance
- 1085 Main St, South Weymouth, MA 02190
About Dr. Nass
Jonathan P. Nass, M.D. is a healthcare provider in South Weymouth, MA specializing in gastroenterology. Jonathan trained at Tulane University School of Medicine, graduating in 2005. Jonathan is also listed as specializing in internal medicine. According to Medicare claims data, Jonathan cared for 599 Medicare patients across 667 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, biopsy of large bowel using a flexible endoscope, and removal of polyps or growths of large bowel using an endoscope with mechanical snare. This provider record is associated with NPI 1558587998.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (781) 331-2922
- Email not available
Practice Locations
1085 MAIN ST
South Weymouth, MA 02190
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
667 services · 599 patients · 14 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
92 | More often than most peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
90 | More often than most peers in Gastroenterology |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
83 | More often than most peers in Gastroenterology |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
18 | As often as other peers in Gastroenterology |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
15 | Less often than most peers in Gastroenterology |
| Dilation of esophagus | Procedure | 43450 |
13 | Less often than most peers in Gastroenterology |
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
13 | Less often than most peers in Gastroenterology |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
120 | More often than most peers in Gastroenterology |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
88 | More often than most peers in Gastroenterology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
75 | More often than most peers in Gastroenterology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterologists at this location 7
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Tulane University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2005 at Tulane University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of large bowel using a flexible endoscope 8
Providers in MA who bill this service to Medicare most often.
Common questions
What kind of doctor is Jonathan P. Nass?
Jonathan P. Nass is a gastroenterologist in South Weymouth, MA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
What is Jonathan P. Nass's address?
Jonathan P. Nass is listed at 1085 Main St, South Weymouth, MA 02190. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Jonathan P. Nass?
The number on file is (781) 331-2922. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Jonathan P. Nass's NPI number?
Jonathan P. Nass's National Provider Identifier is 1558587998. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Jonathan P. Nass train?
Jonathan P. Nass attended Tulane University School of Medicine, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How long has Jonathan P. Nass been practicing?
Jonathan P. Nass has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What procedures does Jonathan P. Nass perform?
According to Medicare billing data, Jonathan P. Nass performs procedures including biopsy of large bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Jonathan P. Nass confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Jonathan P. Nass. If this is you, claiming it is free.
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