Robert Chang, MD
NPI 1093712093 · Internal Medicine Physician · Mount Clemens, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Chang, MD is a Internal Medicine Physician provider in Mount Clemens, MI (NPI 1093712093).
Provider details
- NPI number
- 1093712093
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301054727 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
845 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 386 | $88 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 148 | $47 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 115 | $19 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 64 | $69 |
| Administration of Influenza Virus VaccineG0008 | 48 | $32 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 138 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 700 | 196 |
| Levothyroxine Sodium | 671 | 161 |
| Losartan Potassium | 544 | 156 |
| Amlodipine Besylate | 431 | 122 |
| Metoprolol Succinate | 383 | 101 |
| Lisinopril | 293 | 90 |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$691 across 34 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
Additional practice locations (1)
- 133 S Main StMount Clemens, MI 48043-2308Phone: (586) 468-1600Fax: (586) 465-0329
Registry dates
- Enumerated
- 2005-07-05
- Last updated
- 2020-12-22
- Certified
- 2020-12-22
Frequently asked questions
- What is Robert Chang's NPI number?
- Robert Chang's National Provider Identifier (NPI) is 1093712093, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Chang's specialty?
- Robert Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Chang located?
- Robert Chang's practice location on file with NPPES is 133 S Main St, Mount Clemens, MI 48043.
- What is Robert Chang's phone number?
- The practice phone number listed in the NPPES registry for Robert Chang is (586) 468-1600.
- Does Robert Chang accept Medicare?
- Robert Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Chang's NPI active?
- Yes — Robert Chang's NPI (1093712093) is active in the NPPES registry as of the last update on 2020-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.