Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Ngoc-Duyen Thi Dang, MD

Individual provider Internal Medicine Physician · NPI 1386726818

Ngoc-Duyen Thi Dang, MD practises Gastroenterology in Ann Arbor, Michigan. Graduated from Harvard Medical School in 1994, 32 years ago. Practices with Henry Ford Health System, a 2,540-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
32
Trained at
Harvard Medical School
Licensed in
MI
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1500 E Medical Center Dr 3rd Fl Taubman Ctr Recp D
Ann Arbor, MI 48109-5362 Not confirmed with CMS for 14 years — call before visiting
Phone: (734) 647-5944
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 4301081244 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 4301081244 (MI)

Record details

NPI number1386726818
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 20, 2006
Last updated in NPPESMarch 1, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1994 (32 years in practice)
Group practice Henry Ford Health System — 2540 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 329 times · 96th percentile
Colonoscopy 37 times · 58th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients145
Services billed 482 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Henry Ford Health System

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2540 clinicians in the practice; 12 are shown here.

Other providers in Ann Arbor