Annmarie Stephenson Thomas, DO

Medicare activity in 2024

Official CMS public-use data for Annmarie Stephenson Thomas, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Biopsy of large bowel using a flexible endoscope (45380)94 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)93 services
3. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)74 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)74 services
5. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)54 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High cholesterol75%
• High blood pressure67%
• Arthritis53%
• Diabetes27%
• Osteoporosis26%
• Anxiety25%

Hospitals where Annmarie Stephenson Thomas works

Medicare's Facility Affiliation Data lists Annmarie Stephenson Thomas at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Adventist Healthcare Shady Grove Medical CenterRockville, MD · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 210057

Practice locations

Addresses where Annmarie Stephenson Thomas is enrolled with Medicare (CMS data updated October 2, 2026).

• 14955 Shady Grove Rd, Suite 150Rockville, MD 20850 (301) 340‑3252
• 2021 K St NW, Suite T 110 Metroploitan GastroenterologyWashington, DC 20061 (202) 296‑3449

Group practices

Medicare enrollment lists Annmarie Stephenson Thomas as a member of this group (CMS data updated October 2, 2026).

• Capital Digestive Care LLC241 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Maryland →

Other gastroenterologists in Rockville

Clinicians with the same Medicare primary specialty in Rockville, MD — not a recommendation.

• Nelson T. Chuang, MD
• Soonbok G. Woo, MD
• Jatinder S. Sekhon, MD
• Jeffrey Y. Kim, MD
• Eric A. Pollack, MD
• Robert Hardi, MD
• Byung Soo Yoo, MD
• Jessica J. Rosenberg, MD

All gastroenterologists in Rockville →

Other clinicians in Capital Digestive Care LLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Lindsay S. Gonzalez, PA
• Jonathan Koff, MD
• Zain Raza
• Manish Singla, MD
• Jan Paul Zincke, MD
• Susan Page, CNA

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians