Gastroenterologists · Alabama · October 2026
Best Gastroenterologists in Alabama (October 2026)
Dr. Charles Dasher ranks first with a score of 85.4: 5.0 stars from 200 Google reviews; 54 years since medical school; accepts Medicare assignment. Dr. Christopher Shaver ranks second with a score of 81.2: 4.9 stars from 228 Google reviews; 28 years since medical school; accepts Medicare assignment. Dr. William Halama ranks third with a score of 79.5: 4.9 stars from 89 Google reviews; 41 years since medical school; accepts Medicare assignment.
- 1
Charles Dasher, MD
5.0 out of 5 · 200 Google reviews (not verified as patients)
Score 85.4 · 54 years since medical school; accepts Medicare assignment
- 2
Christopher Shaver, MD
4.9 out of 5 · 228 Google reviews (not verified as patients)
Score 81.2 · 28 years since medical school; accepts Medicare assignment
- 3
William Halama, MD
4.9 out of 5 · 89 Google reviews (not verified as patients)
Score 79.5 · 41 years since medical school; accepts Medicare assignment
- 4
Owen McLean, MD
4.9 out of 5 · 251 Google reviews (not verified as patients)
Score 78.3 · 25 years since medical school; accepts Medicare assignment
- 5
Rohit Malik, MD
4.8 out of 5 · 109 Google reviews (not verified as patients)
Score 78.3 · 42 years since medical school; accepts Medicare assignment
- 6
Gregory Champion, MD
4.9 out of 5 · 64 Google reviews (not verified as patients)
Score 77.9 · 38 years since medical school; accepts Medicare assignment
- 7
Michael Passarella, MD
5.0 out of 5 · 150 Google reviews (not verified as patients)
Score 76.8 · 23 years since medical school; accepts Medicare assignment
- 8
Miles Gresham, MD
4.7 out of 5 · 97 Google reviews (not verified as patients)
Score 75.8 · 45 years since medical school; accepts Medicare assignment
- 9
Rajat Parikh, MD
4.9 out of 5 · 238 Google reviews (not verified as patients)
Score 75.1 · 22 years since medical school; accepts Medicare assignment
- 10
Brent Barranco, MD
4.8 out of 5 · 64 Google reviews (not verified as patients)
Score 75.1 · 29 years since medical school; accepts Medicare assignment
The same list as a table
| Rank | Doctor | City | Score | Rating | Reviews | Years |
|---|---|---|---|---|---|---|
| 1 | Charles Dasher, MD | Birmingham | 85.4 | 5.0 | 200 | 54 |
| 2 | Christopher Shaver, MD | Birmingham | 81.2 | 4.9 | 228 | 28 |
| 3 | William Halama, MD | Birmingham | 79.5 | 4.9 | 89 | 41 |
| 4 | Owen McLean, MD | Birmingham | 78.3 | 4.9 | 251 | 25 |
| 5 | Rohit Malik, MD | Birmingham | 78.3 | 4.8 | 109 | 42 |
| 6 | Gregory Champion, MD | Birmingham | 77.9 | 4.9 | 64 | 38 |
| 7 | Michael Passarella, MD | Birmingham | 76.8 | 5.0 | 150 | 23 |
| 8 | Miles Gresham, MD | Birmingham | 75.8 | 4.7 | 97 | 45 |
| 9 | Rajat Parikh, MD | Birmingham | 75.1 | 4.9 | 238 | 22 |
| 10 | Brent Barranco, MD | Birmingham | 75.1 | 4.8 | 64 | 29 |
How we ranked
Ratings are weighted toward independent, third-party verified patient reviews. When a physician has them, 60% of the rating comes from patients surveyed by an independent third party (not chosen by the practice) and 40% from public, anonymous reviews such as Google. Google reviews are not verified as patient reviews: anyone can post one, positive or negative, without being seen by the physician and from any state or country. So anonymous reviews alone count for less, and a few posts can't carry a physician to the top. BestDocs does not use Yelp reviews at all (why). The score also weighs years since medical school and accepting Medicare assignment. Every physician here has a verified practice website and at least five patient reviews. No one can pay to change a rank. Read the full method.
Questions
Who is the highest-ranked gastroenterologist in Alabama?
Charles Dasher, MD in Birmingham, with a BestDocs score of 85.4 (5.0 stars from 200 Google reviews; 54 years since medical school; accepts Medicare assignment).
How many gastroenterologists in Alabama have online booking?
21 of the 38 ranked gastroenterologists in Alabama offer online booking on their practice website.
How are these gastroenterologists ranked?
By the BestDocs score, which is weighted toward independent third-party verified patient reviews: patient rating (50 points; 60% independent verified reviews and 40% anonymous public reviews when both exist), years in practice (31.25) and verified credentials (18.75). Sponsored placements never change rank. The full method is on the methodology page.
Data as of October 2026. Sources: CMS NPPES, CMS Doctors and Clinicians file, Google business listings, practice websites. Ratings are Google ratings, shown as text and not marked up as reviews.