Ngoc-Duyen Dang, MD
NPI 1386726818 · Gastroenterology Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ngoc-Duyen Dang, MD is a Gastroenterology Physician provider in Ann Arbor, MI (NPI 1386726818).
Provider details
- NPI number
- 1386726818
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301081244 (MI)
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
307 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) |
|---|---|---|
| Review By Radiologist of Image From Tube Placement Into Bile Duct Using an Endoscope74328 | 61 | $22 |
| Removal of Stone Or Debris From Bile Or Pancreatic Duct Using a Flexible Endoscope43264 | 42 | $57 |
| Insertion of Stent Into Pancreatic Or Bile Duct Using a Flexible Endoscope43274 | 40 | $327 |
| Replacement of Stent in Pancreatic Or Bile Duct Using a Flexible Endoscope43276 | 31 | $423 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 28 | $48 |
| Ultrasound Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43259 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 78 | 24 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 36 | 30 |
| Sucralfate | 24 | 14 |
| Ciprofloxacin Hcl | 19 | 19 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 15 | 15 |
| Ursodiol | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$33 across 1 record (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
- 2006-10-20
- Last updated
- 2012-03-01
Frequently asked questions
- What is Ngoc-Duyen Dang's NPI number?
- Ngoc-Duyen Dang's National Provider Identifier (NPI) is 1386726818, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ngoc-Duyen Dang's specialty?
- Ngoc-Duyen Dang is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Ngoc-Duyen Dang located?
- Ngoc-Duyen Dang's practice location on file with NPPES is 1500 East Medical Center Dr, Ann Arbor, MI 48109-5362.
- What is Ngoc-Duyen Dang's phone number?
- The practice phone number listed in the NPPES registry for Ngoc-Duyen Dang is (734) 647-5944.
- Does Ngoc-Duyen Dang accept Medicare?
- Ngoc-Duyen Dang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ngoc-Duyen Dang's NPI active?
- Yes — Ngoc-Duyen Dang's NPI (1386726818) is active in the NPPES registry as of the last update on 2012-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.