Quick answers
- Does Marc H. Shomer accept Medicare assignment?
- Medicare's clinician data says Marc H. Shomer may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Marc H. Shomer see?
- In 2024, CMS data shows 2,065 Original Medicare patients and 11,147 services for Marc H. Shomer. This counts Original Medicare only and measures volume, not quality.
- What is Marc H. Shomer's NPI number?
- 1457457483. 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 Marc H. Shomer, 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 | 2,065 |
|---|---|
| Services billed to Medicare | 11,147 |
| Different services or procedures | 122 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,356 services
- Established patient complete exam of visual system (92014)1,208 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)826 services
- Exam of visual field with extended testing (92083)524 services
- Imaging of retina (92134)482 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 cholesterol75%
- High blood pressure66%
- Arthritis45%
- Diabetes25%
- Ischemic heart disease24%
- Chronic kidney disease19%
Practice locations
Addresses where Marc H. Shomer is enrolled with Medicare (CMS data updated October 2, 2026).
- 1298 W 7th StUpland, CA 91786 (909) 981‑9800
- 32341 Coast HwyLaguna Beach, CA 92651 (909) 981‑9800
- 797 S Arroyo PkwyPasadena, CA 91105 (909) 981‑9800
- 974 W Foothill BlvdUpland, CA 91786 (909) 981‑2273
Group practices
Medicare enrollment lists Marc H. Shomer as a member of these groups (CMS data updated October 2, 2026).
- Advanced Medical and Urgent Care Center9 clinicians in the group
- Laguna Beach Urgent Care Inc2 clinicians in the group
- Marc H Shomer MD PHD Inc2 clinicians in the group
Specialties
- Ophthalmologyprimary
- General Practicealso
Other ophthalmologists in Upland
Clinicians with the same Medicare primary specialty in Upland, CA — not a recommendation.
Other clinicians in Advanced Medical and Urgent Care Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Un Of California, Irvine, College Of Medicine |
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1457457483 |
| 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