Quick answers
- Does Sheri L. Rowen accept Medicare assignment?
- Yes. Medicare's clinician data says Sheri L. Rowen 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 Sheri L. Rowen see?
- In 2024, CMS data shows 285 Original Medicare patients and 934 services for Sheri L. Rowen. This counts Original Medicare only and measures volume, not quality.
- What is Sheri L. Rowen's NPI number?
- 1548203904. 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 Sheri L. Rowen, 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 | 285 |
|---|---|
| Services billed to Medicare | 934 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Removal of cataract with insertion of prosthetic lens (66984)195 services
- Measurement of corneal curvature and depth of eye (92136)173 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)167 services
- Removal of recurring cataract in lens capsule using a laser (66821)89 services
- Ct scan of cornea (92025)45 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 pressure63%
- Arthritis41%
- Diabetes22%
- Ischemic heart disease20%
- Osteoporosis16%
Practice locations
Addresses where Sheri L. Rowen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1400 N Harbor Blvd, Suite 130Fullerton, CA 92835 (714) 831‑0091
- 15 Mareblu, Suite 260Aliso Viejo, CA 92656 (949) 831‑4144
- 4220 Von Karman Ave, Suite 100Newport Beach, CA 92660 (949) 854‑7400
Group practices
Medicare enrollment lists Sheri L. Rowen as a member of these groups (CMS data updated October 2, 2026).
- Thomas S Tooma M D A Professional Corporation31 clinicians in the group
- Shahla Abedi M D A Professional Corporation2 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Fullerton
Clinicians with the same Medicare primary specialty in Fullerton, CA — not a recommendation.
Other clinicians in Thomas S Tooma M D A Professional Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548203904 |
| 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