Quick answers
- Does Katherine M. Tanaka accept Medicare assignment?
- Yes. Medicare's clinician data says Katherine M. Tanaka 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 Katherine M. Tanaka see?
- In 2024, CMS data shows 140 Original Medicare patients and 976 services for Katherine M. Tanaka. This counts Original Medicare only and measures volume, not quality.
- What is Katherine M. Tanaka's NPI number?
- 1336344878. 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 Katherine M. Tanaka, 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 | 140 |
|---|---|
| Services billed to Medicare | 976 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 81 |
Most frequent services
- Established patient problem focused exam of visual system (92012)206 services
- Removal of eyelashes using forceps (67820)163 services
- Photography of the retina (92250)159 services
- Established patient complete exam of visual system (92014)158 services
- Exam of visual field with extended testing (92083)70 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%
- Arthritis47%
- Osteoporosis34%
- Diabetes29%
- Ischemic heart disease26%
Practice locations
Addresses where Katherine M. Tanaka is enrolled with Medicare (CMS data updated October 2, 2026).
- 5512 E Britton Dr, Suite 200Long Beach, CA 90815 (562) 421‑2020
Group practices
Medicare enrollment lists Katherine M. Tanaka as a member of this group (CMS data updated October 2, 2026).
- Katherine M Tanaka MD Inc2 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Long Beach
Clinicians with the same Medicare primary specialty in Long Beach, CA — not a recommendation.
Other clinicians in Katherine M Tanaka MD Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Irvine, California College Of Medicine |
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336344878 |
| 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