Quick answers
- Does Carol H. Kwak accept Medicare assignment?
- Yes. Medicare's clinician data says Carol H. Kwak 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 Carol H. Kwak see?
- In 2024, CMS data shows 226 Original Medicare patients and 1,134 services for Carol H. Kwak. This counts Original Medicare only and measures volume, not quality.
- What is Carol H. Kwak's NPI number?
- 1891303293. 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 Carol H. Kwak, 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 | 226 |
|---|---|
| Services billed to Medicare | 1,134 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)420 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)166 services
- Injection, ceftriaxone sodium, per 250 mg (J0696)82 services
- Injection of drug or substance under skin or into muscle (96372)76 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)69 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 pressure70%
- Arthritis46%
- Diabetes26%
- Anxiety22%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)21%
Practice locations
Addresses where Carol H. Kwak is enrolled with Medicare (CMS data updated October 2, 2026).
- 3220 Yorba Linda BlvdFullerton, CA 92831 (714) 465‑4127
- 4139 Ball RdCypress, CA 90630 (657) 377‑0740
- 5424 Woodruff AveLakewood, CA 90713 (562) 452‑0038
Group practices
Medicare enrollment lists Carol H. Kwak as a member of this group (CMS data updated October 2, 2026).
- Oneil Enterprises Inc16 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Fullerton
Clinicians with the same Medicare primary specialty in Fullerton, CA — not a recommendation.
Other clinicians in Oneil Enterprises Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891303293 |
| 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