Physician Profile
Unclaimed ProfileAbout WALKER
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Education & Training
Areas of Expertise
Common questions
What does Dr. Walker specialise in?
Dr. Walker is a gastroenterology in Mesa, AZ. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where is Dr. Walker located?
Dr. Walker is listed at 6020 E ARBOR AVE #101, Mesa, AZ 85206. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Walker's phone number?
The number on file is (480) 985-1700. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Walker?
Dr. Walker's National Provider Identifier is 1528053121. 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. Walker go to medical school?
Dr. Walker attended Other, graduating in 1981. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Walker have?
Dr. Walker has 45 years experience. Calculated from a graduation year of 1981, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Walker do most often?
According to Medicare billing data, Dr. Walker performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare and biopsy of large bowel using a flexible endoscope; reads or performs imaging such as ultrasound scan of organ tissue for measuring elasticity; provides treatments such as measurement of hydrogen in breath to test for stomach and bowel symptoms, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Walker's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Walker. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (480) 985-1700
- Email not available
Practice Locations
6020 E ARBOR AVE #101
Mesa, AZ 85206
Procedures Most Often Billed to Medicare
1,146 services · 1,091 patients · 18 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
183 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
138 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
87 |
| Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | Procedure | 43249 |
56 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
42 |
| Insertion of guide wire with dilation of esophagus using a flexible endoscope | Procedure | 43248 |
27 |
| Injection beneath lining of large bowel using a flexible endoscope | Procedure | 45381 |
13 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
12 |
| Ultrasound scan of organ tissue for measuring elasticity | Imaging | 76981 |
11 |
| Measurement of hydrogen in breath to test for stomach and bowel symptoms | Treatment | 91065 |
25 |
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 5
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 Mesa 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1981 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 7
Providers in AZ who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.