Chang Yang, M.D.
NPI 1902219611 · Internal Medicine Physician · Elmhurst, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chang Yang, M.D. is a Internal Medicine Physician provider in Elmhurst, IL (NPI 1902219611).
Provider details
- NPI number
- 1902219611
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 01086875A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,286 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 722 | $117 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 290 | $111 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 201 | $166 |
| Critical Care, First 30-74 Minutes99291 | 38 | $200 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 35 | $76 |
Typical Medicare-allowed amounts for these services range $76–$200 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Diltiazem Hclbrand: Diltiazem 24hr Er (xr) | 24 | — |
| Metoprolol Succinate | 23 | 15 |
| Pantoprazole Sodium | 21 | 14 |
| Atorvastatin Calcium | 18 | 15 |
| Carvedilol | 16 | — |
| Lisinopril | 15 | 12 |
| Prednisone | 13 |
Practice location
Mailing address
Additional practice locations (5)
- 5841 S Maryland AveChicago, IL 60637-1443Phone: (888) 824-0200
- 1 Ingalls DrHarvey, IL 60426-3558Phone: (888) 824-0200
- 1555 Barrington RdHoffman Estates, IL 60169-1019Phone: (224) 273-3152
- 615 Fulton StPort Clinton, OH 43452-2001Phone: (419) 734-3131
- 333 E 2nd StRichland Center, WI 53581-1914Phone: (608) 647-6321
Registry dates
- Enumerated
- 2014-06-10
- Last updated
- 2025-06-02
- Certified
- 2025-06-02
Frequently asked questions
- What is Chang Yang's NPI number?
- Chang Yang's National Provider Identifier (NPI) is 1902219611, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chang Yang's specialty?
- Chang Yang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Chang Yang located?
- Chang Yang's practice location on file with NPPES is 155 E Brush Hill Rd, Elmhurst, IL 60126-5658.
- What is Chang Yang's phone number?
- The practice phone number listed in the NPPES registry for Chang Yang is (331) 221-8952.
- Does Chang Yang accept Medicare?
- Chang Yang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chang Yang's NPI active?
- Yes — Chang Yang's NPI (1902219611) is active in the NPPES registry as of the last update on 2025-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.