ROBERT A CHANG (MD) – Internal Medicine Physician, NPI 1093712093
Internal Medicine Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
7,218 INTERNAL MEDICINE in MI
Provider Addresses for ROBERT A CHANG (MD)
133 S Main St
Mount Clemens, MI 480432308
Phone: (586) 468-1600
Fax: (586) 465-0329
Type: Location
2689 SOLUTION CENTER
CHICAGO, IL 606770001
Phone: (586) 329-1880
Fax: (586) 465-0329
Type: Mailing
133, South Main Street, Mount Clemens, Macomb County, Michigan, 48043, United States
MOUNT CLEMENS, MI 48043
Phone: (586) 468-1600
Fax: (586) 465-0329
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 66 Open Payments records for all available years, with a total value of $1,246.
Total Amount is formed as General ($1,246) + Research ($0) + Ownership ($0) = $1,246.
Last reported payment date: 2024-11-19 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($207).
Total Amount
$1,246
General + Research + Ownership
Payments
66
Total payment records
General Amount
$1,246
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GlaxoSmithKline, LLC. | $207 |
| Amgen Inc. | $189 |
| Novo Nordisk Inc | $117 |
| Exact Sciences Corporation | $113 |
| ABBVIE INC. | $86 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-03-04
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050304000626 | I | Internal Medicine | MI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 386 | 213 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 187 | 187 | $0 |
| G0444 | Annual depression screening, 5 to 15 minutes | 165 | 165 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 155 | 109 | $0 |
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 58 | 50 | $0 |
Insurance plans in this area (ZIP 48043)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | MI | |
| - | MI | |
| Nurse Practitioner | MI | |
| Nurse Practitioner | MI | |
| Certified Registered Nurse Anesthetist (Crna) | MI | |
| Pediatric Medicine, Allergy/Immunology | MI | |
| Certified Registered Nurse Anesthetist (Crna) | MI | |
| Physician Assistant | MI | |
| Family Practice | MI | |
| Nurse Practitioner | MI |
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