Physician Profile
Unclaimed ProfileAbout RUYMANN
Frederick W Ruymann, MD practices gastroenterology in Cambridge, MA. Frederick is a 1987 graduate of Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University. According to Medicare claims data, Frederick cared for 1,007 Medicare patients across 1,094 services.
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
- (617) 661-0221
- Email not available
Practice Locations
300 MOUNT AUBURN ST STE 405
Cambridge, MA 02138
Procedures Most Often Billed to Medicare
1,094 services · 1,007 patients · 21 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
138 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
136 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
71 |
| Removal of stone or debris from bile or pancreatic duct using a flexible endoscope | Procedure | 43264 |
64 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
51 |
| Incision of pancreatic outlet using a flexible endoscope | Procedure | 43262 |
39 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
38 |
| Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43255 |
25 |
| Insertion of stent into pancreatic or bile duct using a flexible endoscope | Procedure | 43274 |
24 |
| Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | Procedure | 43249 |
23 |
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 gastroenterology specialists at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 30 related providers in 4 groups
Other gastroenterology specialists in Cambridge 6
Same specialty, same city.
Trained at Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University 8
Other providers in the same specialty who trained at the same institution.
Class of 1987 at Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University 8
Providers who graduated from the same medical school in the same year.
Also performs Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in MA who bill this service to Medicare most often.
Common questions
What does Dr. Ruymann specialize in?
Dr. Ruymann is a gastroenterology in Cambridge, MA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where is Dr. Ruymann located?
Dr. Ruymann is listed at 300 MOUNT AUBURN ST STE 405, Cambridge, MA 02138. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Ruymann's phone number?
The number on file is (617) 661-0221. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Ruymann's NPI number?
Dr. Ruymann's National Provider Identifier is 1568466316. 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. Ruymann go to medical school?
Dr. Ruymann attended Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University, graduating in 1987. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Ruymann been practicing?
Dr. Ruymann has 39 years experience. Calculated from a graduation year of 1987, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Ruymann do most often?
According to Medicare billing data, Dr. Ruymann performs procedures including diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope and diagnostic exam of large bowel using a flexible endoscope; provides treatments such as imaging of digestive tract done from the inside of the digestive tract, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Ruymann confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ruymann. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.