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Compare the published Medicare service mix of Gregory L. Shannon, M.D. with clinicians in the same registry specialty: Gastroenterology · Internal Medicine (CMS).

SUGAR LAND, TX · Exact areaEdit location

2024 published service data · 18 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Shaadi John Abughazaleh

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Special stained specimen slides to identify organisms including interpretation and report (88312)
  • Special stained specimen slides to examine tissue including interpretation and report (88313)
85%Service-mix similarityView profile →

Pragnesh Jitendrabhai Patel, MD

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Special stained specimen slides to identify organisms including interpretation and report (88312)
  • Special stained specimen slides to examine tissue including interpretation and report (88313)
78%Service-mix similarityView profile →

Abraham Chacko, D.O.

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Special stained specimen slides to identify organisms including interpretation and report (88312)
  • Special stained specimen slides to examine tissue including interpretation and report (88313)
77%Service-mix similarityView profile →

Nisreen Husain, M.D.

Gastroenterology · Internal Medicine (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
68%Service-mix similarityView profile →

Charles Gia Phan, M.D.

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
67%Service-mix similarityView profile →

Maryann Osayande

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
63%Service-mix similarityView profile →

Altaib Al Yassin

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
58%Service-mix similarityView profile →

Adeeb Jay Dwairy, MD

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
57%Service-mix similarityView profile →

Shaheer Ahmed Siddiqui, M.D.

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
56%Service-mix similarityView profile →

Leka Gajula, MD

Gastroenterology · Internal Medicine (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Special stained specimen slides to identify organisms including interpretation and report (88312)
  • Special stained specimen slides to examine tissue including interpretation and report (88313)
55%Service-mix similarityView profile →

Sushovan Guha, MD, PHD

Gastroenterology · Internal Medicine (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
47%Service-mix similarityView profile →

Stanley Howard Stein, M.D.

Gastroenterology (CMS) · Sugar Land, TX

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
46%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.