Tuanh Tonnu, MD
NPI 1083723878 · Gastroenterology Physician · Gaithersburg, MD
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tuanh Tonnu, MD is a Gastroenterology Physician provider in Gaithersburg, MD (NPI 1083723878).
Provider details
- NPI number
- 1083723878
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- D47295 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,102 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 337 | $100 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 167 | $141 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 115 | $105 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 93 | $141 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 88 | $122 |
| Biopsy of Large Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 273 | 76 |
| Omeprazole | 187 | 62 |
| Atorvastatin Calcium | 143 | 40 |
| Metformin Hcl | 109 | 30 |
| Losartan Potassium | 102 | 28 |
| Simvastatin | 80 | 24 |
| Famotidine | 76 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$383 across 18 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-29
- Last updated
- 2016-08-02
Frequently asked questions
- What is Tuanh Tonnu's NPI number?
- Tuanh Tonnu's National Provider Identifier (NPI) is 1083723878, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tuanh Tonnu's specialty?
- Tuanh Tonnu is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Tuanh Tonnu located?
- Tuanh Tonnu's practice location on file with NPPES is 9057 Shady Grove Ct, Gaithersburg, MD 20877.
- What is Tuanh Tonnu's phone number?
- The practice phone number listed in the NPPES registry for Tuanh Tonnu is (301) 721-1614.
- Does Tuanh Tonnu accept Medicare?
- Tuanh Tonnu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tuanh Tonnu's NPI active?
- Yes — Tuanh Tonnu's NPI (1083723878) is active in the NPPES registry as of the last update on 2016-08-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.