Tuanh Tonnu

Medicare activity in 2024

Official CMS public-use data for Tuanh Tonnu, 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)337 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)167 services
3. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)115 services
4. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)93 services
5. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)88 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 blood pressure75%
• High cholesterol75%
• Diabetes40%
• Arthritis34%
• Osteoporosis24%
• Ischemic heart disease17%

Hospitals where Tuanh Tonnu works

Medicare's Facility Affiliation Data lists Tuanh Tonnu 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 Tuanh Tonnu is enrolled with Medicare (CMS data updated October 2, 2026).

• 187 Thomas Johnson Dr, Suite 6Frederick, MD 21702
• 9057 Shady Grove CourtGaithersburg, MD 20877 (301) 721‑1614

Group practices

Medicare enrollment lists Tuanh Tonnu as a member of this group (CMS data updated October 2, 2026).

• Amber Hill Physical Therapy Inc334 clinicians in the group

Specialties

• Gastroenterologyprimary
• Internal Medicinealso

Find other Gastroenterology doctors in Maryland →

Other gastroenterologists in Frederick

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

• David W. Kossoff, MD
• Leonard E. Kane, MD
• Pilin D. Francis, DO
• Hemant Chatrath, MD
• Mark Gloger, MD
• Sanmeet Singh, MD
• Faisal M. Bhinder, MD
• Ruhail Kohli, MD

All gastroenterologists in Frederick →

Other clinicians in Amber Hill Physical Therapy Inc

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

• Kathleen St Jacques, NP
• Frank Oben Nguembou, NP
• Heather P. Delauter, NP
• Sydney Danielson
• Margaret P. Oberman, MD
• Lindsay McBurney, PA

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