Physician Profile
Unclaimed ProfileAbout CASSIS
Paul Norman Cassis, M.D. practices gastroenterology in Durham, NC. Paul is a 2015 graduate of West Virginia University School of Medicine. Paul is also listed as specializing in student in an organized health care education program. Medicare claims data shows Paul provided 469 services to 412 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (919) 806-8322
- Email not available
Practice Locations
249 NC-54 STE 200
Durham, NC 27713
Procedures Most Often Billed to Medicare
469 services · 412 patients · 10 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
81 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
28 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
17 |
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
12 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
11 |
| Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes | Treatment | 99153 |
85 |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monit | Billing code | G0500 |
90 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
71 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
37 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
37 |
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.
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.
Other gastroenterology specialists in Durham 8
Same specialty, same city.
Trained at West Virginia 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 2015 at West Virginia University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of polyps or growths of large bowel using an endoscope with mechanical snare 8
Providers in NC who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Cassis?
Dr. Cassis is a gastroenterology in Durham, NC. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
What is Dr. Cassis's address?
Dr. Cassis is listed at 249 NC-54 STE 200, Durham, NC 27713. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Cassis?
The number on file is (919) 806-8322. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Cassis?
Dr. Cassis's National Provider Identifier is 1992191795. 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 Dr. Cassis train?
Dr. Cassis attended West Virginia University School of Medicine, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Cassis have?
Dr. Cassis has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Cassis perform?
According to Medicare billing data, Dr. Cassis performs procedures including removal of polyps or growths of large bowel using an endoscope with mechanical snare, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope and biopsy of large bowel using a flexible endoscope; provides treatments such as use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Cassis's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Cassis. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.