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Edit this profileAt a glance
- 480 4Th Ave, Suite 316, Chula Vista, CA 91910
About Dr. Duque
John J. Duque, M.D. is a healthcare provider in Chula Vista, CA specializing in gastroenterology. John trained at University of California, San Diego School of Medicine, graduating in 1981. Medicare claims data shows John provided 425 services to 399 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more, and diagnostic exam of large bowel using a flexible endoscope. This provider record is associated with NPI 1295710747.
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
- (619) 691-0240
- Email not available
Practice Locations
480 4TH AVE SUITE 316
Chula Vista, CA 91910
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
425 services · 399 patients · 7 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
44 | More often than most peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
42 | As often as other peers in Gastroenterology |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
40 | 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 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
143 | More often than most peers in Gastroenterology |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
129 | More than most peers in Gastroenterology |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
11 | 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.
Other gastroenterologists at this location 1
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.
Other gastroenterologists in Chula Vista 6
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of California, San Diego School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1981 at University of California, San Diego School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Diagnostic exam of large bowel using a flexible endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does John J. Duque specialize in?
John J. Duque is a gastroenterologist in Chula Vista, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where is John J. Duque located?
John J. Duque is listed at 480 4Th Ave Suite 316, Chula Vista, CA 91910. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is John J. Duque's phone number?
The number on file is (619) 691-0240. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for John J. Duque?
John J. Duque's National Provider Identifier is 1295710747. 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 John J. Duque train?
John J. Duque attended University of California, San Diego School of Medicine, graduating in 1981. This comes from the CMS National Downloadable File.
CMS public data
How much experience does John J. Duque have?
John J. Duque has 45 years experience. Calculated from a graduation year of 1981, reported in the CMS National Downloadable File.
CMS public data
What does John J. Duque do most often?
According to Medicare billing data, John J. Duque performs procedures including diagnostic exam 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
Is John J. Duque's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by John J. Duque. If this is you, claiming it is free.
Guide.md
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