Dr. Robert Chang , MD
Internal Medicine • Ann Arbor, MI
Professional Overview & Biography Verified Profile Summary
Dr. Robert Chang, MD is a certified Internal Medicine practicing in Ann Arbor, MI. With approximately 24 years of clinical experience since graduating from University Of Michigan Medical School in 2002, Dr. Chang delivers high-quality medical care to the local community at 1500 E MEDICAL CENTER DR.
Dr. Chang is affiliated with Regents Of The University Of Michigan and accepts Medicare assignment.
Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least, hospital discharge day management, more than, initial hospital care with moderate level of medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
1500 E Medical Center Dr
Ann Arbor, MI 481095000
Medicare Profile & Education
University Of Michigan Medical School
2002
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Internal Medicine in Ann Arbor, MI
Practicing in Ann Arbor, MI (6010 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Performed Procedures & Service Volume
Top Medicare Part B procedures performed by this practitioner
| HCPCS Code & Description | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
|
68 | 33 | $335.50 | $118.63 |
|
99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
|
49 | 19 | $213.04 | $78.91 |
|
99239
Hospital discharge day management, more than 30 minutes
|
18 | 18 | $357.56 | $114.36 |
Medical Specialties & State Licenses
CMS Verified: 2025-09-23NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Additional State Medicaid & Healthcare Payer Identifiers
Hospital & Practice Group Affiliations
Regents Of The University Of Michigan
1500 E Medical Ctr Dr 3rd Floor, Ann Arbor, MI 481090352
Phone: 7349365582
Secondary Practice Locations
1500 East Medical Center Dr, 3rd Floor Taubman Ctr Recp B
Ann Arbor, MI 481095352
Phone: 7349365582
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Internal Medicine - Gastroenterology
Doctor of Medicine (M.D.)
Pathology - Cytopathology
Doctor of Medicine (M.D.)
Pediatrics - Pediatric Infectious Diseases
Doctor of Medicine (M.D.)
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Family Medicine - Hospice and Palliative Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 1500 E MEDICAL CENTER DR, ANN ARBOR, MI 481095000 (Tel: 7349364000)
Registered at 3621 S STATE ST, ANN ARBOR, MI 481081633 (Tel: 7346475299)
NPI status registered as active in NPPES database
Registered at 1500 EAST MEDICAL CENTER DR, 3RD FLOOR TAUBMAN CTR RECP B, ANN ARBOR, MI 481095352 (Tel: 7349365582)
Registered at 3621 S STATE ST, 700 KMS PLACE, ANN ARBOR, MI 48108 (Tel: 7349362047)
Recorded as ROBERT CHANG, MD
Internal Medicine (License #4301079933 in MI)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
Verified patient ratings, medical care experiences, and facility photos
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NPI Administrative Meta
Mailing Address
3621 S State St
Ann Arbor, MI 481081633
Phone: 7346475299
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.