James Liang, M.D.
NPI 1578541983 · Ophthalmology Physician · Oak Lawn, IL
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Liang, M.D. is a Ophthalmology Physician provider in Oak Lawn, IL (NPI 1578541983).
Provider details
- NPI number
- 1578541983
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036051267 (IL)
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,263 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) |
|---|---|---|
| Imaging of Retina92134 | 482 | $41 |
| Established Patient Complete Exam of Visual System92014 | 464 | $126 |
| Injection of Drug Into Eye67028 | 276 | $116 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 30 | $175 |
| Imaging of Optic Nerve92133 | 11 | $37 |
Typical Medicare-allowed amounts for these services range $37–$175 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 263 | 57 |
| Ketorolac Tromethamine | 147 | 42 |
| Timolol Maleate | 50 | 13 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 36 | 11 |
| Brimonidine Tartrate | 32 | 12 |
| Prednisolone Acetate | 24 | 11 |
| Diclofenac Sodium | 21 | — |
| Dorzolamide Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$145 across 5 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 (2)
- 3241 S Michigan AvenueChicago, IL 60616Phone: (312) 949-7221Fax: (312) 949-7667
- 2600 S Michigan AvenueSte 212Chicago, IL 60616-2859Phone: (312) 567-2795Fax: (800) 707-4890
Registry dates
- Enumerated
- 2006-01-05
- Last updated
- 2023-07-05
- Certified
- 2023-07-05
Frequently asked questions
- What is James Liang's NPI number?
- James Liang's National Provider Identifier (NPI) is 1578541983, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Liang's specialty?
- James Liang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is James Liang located?
- James Liang's practice location on file with NPPES is 4429 W 95th St, Oak Lawn, IL 60453-2625.
- What is James Liang's phone number?
- The practice phone number listed in the NPPES registry for James Liang is (708) 422-2665.
- Does James Liang accept Medicare?
- James Liang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Liang's NPI active?
- Yes — James Liang's NPI (1578541983) is active in the NPPES registry as of the last update on 2023-07-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.