Quick answers
- Does Alan C. Westeren accept Medicare assignment?
- Yes. Medicare's clinician data says Alan C. Westeren 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 Alan C. Westeren see?
- In 2024, CMS data shows 33 Original Medicare patients and 787 services for Alan C. Westeren. This counts Original Medicare only and measures volume, not quality.
- What is Alan C. Westeren's NPI number?
- 1962513135. 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 Alan C. Westeren, 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 | 33 |
|---|---|
| Services billed to Medicare | 787 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or (G2212)413 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)132 services
- Extended exam of the back part of the eye with optic nerve drawing (92202)83 services
- Exam of visual field with extended testing (92083)64 services
- Extended exam of the back part of the eye with retinal drawing (92201)57 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 cholesterol64%
Hospitals where Alan C. Westeren works
Medicare's Facility Affiliation Data lists Alan C. Westeren at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Scripps Memorial Hospital La JollaLa Jolla, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050324
Practice locations
Addresses where Alan C. Westeren is enrolled with Medicare (CMS data updated October 2, 2026).
- 6529 La Jolla BlvdLa Jolla, CA 92037 (858) 454‑1942
Specialties
- Ophthalmologyprimary
- General Practicealso
Other ophthalmologists in La Jolla
Clinicians with the same Medicare primary specialty in La Jolla, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1962513135 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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