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Edit this profileAt a glance
- 955 Main St, Winchester, MA 01890
About Dr. Vanneman
William M. Vanneman, M.D. is a healthcare provider in Winchester, MA specializing in gastroenterology. William trained at Albany Medical College of Union University, graduating in 1970. According to Medicare claims data, William cared for 190 Medicare patients across 200 services. The services billed most often include initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope. This provider record is associated with NPI 1124075718.
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) 729-5855
- Email not available
Practice Locations
955 MAIN ST
Winchester, MA 01890
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
- Acute pancreatitis
- Gallstones
- Pancreatic cysts
- Primary sclerosing cholangitis
Colon and anorectal
- Anal fissure
- Colon cancer
- Colon polyps
- Lower gastrointestinal bleeding
Esophagus and swallowing
- Barrett's esophagus
- Eosinophilic esophagitis
- Esophageal stricture
- Esophagitis
Functional bowel and motility
- Chronic diarrhea
- Fecal incontinence
- Small intestinal bacterial overgrowth
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
- Functional dyspepsia
- Gastritis
- Gastroparesis
- H. pylori infection
- Peptic ulcer disease
Bowel & Colon
- Diverticulitis
Digestive Symptoms
- Constipation
Gallbladder & Bile Ducts
- Blocked Bile Duct
Procedures & services
Most searched procedures
- Colonoscopy
- Endoscopy
- Gallbladder removal
- Hernia repair
- Liver biopsy
Lower endoscopy
- Colon polyp removal
- Endoscopic control of gastrointestinal bleeding
- Flexible sigmoidoscopy
Upper endoscopy
- Endoscopic submucosal dissection
- Esophageal dilation
Capsule and physiology testing
- Anorectal manometry
- Capsule endoscopy
- Esophageal manometry
Diagnostic Testing
- 24-Hour Acid Reflux Test
- EUS-Guided Fine Needle Biopsy
- H. Pylori Breath Test
- SIBO Breath Test
Liver procedures
- Esophageal variceal banding
- Liver elastography
- Paracentesis
Treatments
- Stool Transplant
Procedures Most Often Billed to Medicare
200 services · 190 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
31 | More often than most peers in Gastroenterology |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
17 | Less often than most peers in Gastroenterology |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
16 | Less often than most peers in Gastroenterology |
| Diagnostic exam of lower portion of large bowel using a flexible endoscope | Procedure | 45330 |
15 | More often than most peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
11 | Less 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 |
49 | More 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 |
32 | As often as other peers in Gastroenterology |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
16 | Less often than most peers in Gastroenterology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
13 | Less 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.
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.
Other gastroenterologists in Winchester 2
Same specialty, same city.
More connections — 20 related providers in 3 groups
Trained at Albany Medical College of Union University 8
Other providers in the same specialty who trained at the same institution.
Class of 1970 at Albany Medical College of Union University 4
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 is William M. Vanneman's specialty?
William M. Vanneman is a gastroenterologist in Winchester, MA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find William M. Vanneman?
William M. Vanneman is listed at 955 Main St, Winchester, MA 01890. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact William M. Vanneman?
The number on file is (781) 729-5855. Contact the office directly to confirm availability and scheduling.
NPI registry
What is William M. Vanneman's NPI number?
William M. Vanneman's National Provider Identifier is 1124075718. 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
What is William M. Vanneman's education?
William M. Vanneman attended Albany Medical College of Union University, graduating in 1970. This comes from the CMS National Downloadable File.
CMS public data
How long has William M. Vanneman been practicing?
William M. Vanneman has 56 years experience. Calculated from a graduation year of 1970, reported in the CMS National Downloadable File.
CMS public data
What is William M. Vanneman known for?
According to Medicare billing data, William M. Vanneman 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 biopsy of large 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 William M. Vanneman confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by William M. Vanneman. If this is you, claiming it is free.
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