Quick answers
- Does John F. Ling Iii accept Medicare assignment?
- Yes. Medicare's clinician data says John F. Ling Iii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does John F. Ling Iii see?
- In 2024, CMS data shows 494 Original Medicare patients and 1,644 services for John F. Ling Iii. This counts Original Medicare only and measures volume, not quality.
- What is John F. Ling Iii's NPI number?
- 1023436391. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for John F. Ling Iii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 494 |
|---|---|
| Services billed to Medicare | 1,644 |
| Different services or procedures | 47 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient problem focused exam of visual system (92012)449 services
- Photography of the retina (92250)266 services
- Established patient complete exam of visual system (92014)185 services
- Exam of visual field with extended testing (92083)133 services
- Imaging of optic nerve (92133)119 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Diabetes45%
- Arthritis43%
- Chronic kidney disease33%
- Ischemic heart disease20%
Practice locations
Addresses where John F. Ling Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 3300 E S St, Suite 105Lakewood, CA 90805 (562) 232‑1442
- 3801 Katella Ave, Suite 130Los Alamitos, CA 90720 (562) 598‑7728
Group practices
Medicare enrollment lists John F. Ling Iii as a member of this group (CMS data updated October 2, 2026).
- Lakewood Eye Physicians and Surgeons Inc a Medical Group8 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Lakewood
Clinicians with the same Medicare primary specialty in Lakewood, CA — not a recommendation.
Other clinicians in Lakewood Eye Physicians and Surgeons Inc a Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Indiana University School Of Medicine |
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023436391 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians