John Yang, MD
NPI 1942315312 · Ophthalmology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Yang, MD is a Ophthalmology Physician provider in Chicago, IL (NPI 1942315312).
Provider details
- NPI number
- 1942315312
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
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
19 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,423 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 | 2,010 | $132 |
| Imaging of Optic Nerve92133 | 487 | $35 |
| Exam of Visual Field With Extended Testing92083 | 468 | $64 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 372 | $17 |
| Imaging of Retina92134 | 356 | $40 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 170 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 437 | 129 |
| Timolol Maleate | 196 | 69 |
| Prednisolone Acetate | 132 | 87 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 106 | 29 |
| Brimonidine Tartrate | 105 | 39 |
| Cyclosporinebrand: Restasis | 82 | 30 |
| Bimatoprostbrand: Lumigan | 82 | 26 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$557 across 20 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
Registry dates
- Enumerated
- 2006-08-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Yang's NPI number?
- John Yang's National Provider Identifier (NPI) is 1942315312, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Yang's specialty?
- John Yang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Yang located?
- John Yang's practice location on file with NPPES is 676 N St Clair, Chicago, IL 60611.
- What is John Yang's phone number?
- The practice phone number listed in the NPPES registry for John Yang is (312) 475-1000.
- Does John Yang accept Medicare?
- John Yang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Yang's NPI active?
- Yes — John Yang's NPI (1942315312) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.