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Edit this profileAt a glance
- 355 E 21St Street Suite, San Bernardino, CA 92404
About Dr. Evans
John R. Evans, MD is a healthcare provider in San Bernardino, CA specializing in gastroenterology. John trained at Jefferson Medical College of Thomas Jefferson University, graduating in 1983. According to Medicare claims data, John cared for 767 Medicare patients across 2,974 services. The services billed most often include application of chemical to stop tissue regrowth in wound, subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes, and subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more. This provider record is associated with NPI 1245253582.
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
- (909) 886-2609
- Email not available
Practice Locations
355 E 21ST STREET SUITE
San Bernardino, CA 92404
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
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
2,974 services · 767 patients · 17 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Application of chemical to stop tissue regrowth in wound | Procedure | 17250 |
1,075 | Too few peers to compare |
| Replacement of stomach stoma tube | Procedure | 43762 |
124 | More than most peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
37 | As often as other peers in Gastroenterology |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
28 | Less often than most peers in Gastroenterology |
| Replacement of stomach stoma tube | Procedure | 43762 |
17 | More than most peers in Gastroenterology |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
12 | Less often than most peers in Gastroenterology |
| Limited ultrasound scan of abdomen | Imaging | 76705 |
21 | As often as other peers in Gastroenterology |
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
994 | Too few peers to compare |
| Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more | Office visit | 99308 |
225 | As often as other 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 |
130 | 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.
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 San Bernardino 2
Same specialty, same city.
Trained at Jefferson Medical College of Thomas Jefferson University 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1983 at Jefferson Medical College of Thomas Jefferson University 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Evans specialize in?
Dr. Evans is a gastroenterologist in San Bernardino, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where is Dr. Evans located?
Dr. Evans is listed at 355 E 21St Street Suite, San Bernardino, CA 92404. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Evans's phone number?
The number on file is (909) 886-2609. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Evans's NPI number?
Dr. Evans's National Provider Identifier is 1245253582. 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. Evans go to medical school?
Dr. Evans attended Jefferson Medical College of Thomas Jefferson University, graduating in 1983. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Evans been practicing?
Dr. Evans has 43 years experience. Calculated from a graduation year of 1983, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Evans do most often?
According to Medicare billing data, Dr. Evans performs procedures including application of chemical to stop tissue regrowth in wound, replacement of stomach stoma tube and removal of polyps or growths of large bowel using an endoscope with mechanical snare; reads or performs imaging such as limited ultrasound scan of abdomen, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Evans confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Evans. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.