Diamond Bar sees $2,142,243 in Medicaid payments for National Codes in 2024

Diamond Bar Medicaid providers reported $2,142,243 in 2024 billings for services under the National Codes Established for State Medicaid Agencies category, based on data from the U.S. Department of Health and Human Services Medicaid Provider Spending database. Compared with the previous year, when such claims totaled $1,853,099, the figure represents a 15.6% rise.

Medicaid, managed by states and funded by both federal and state governments, provides health coverage for low-income people, children, seniors, and those with disabilities, making up a major component of the U.S. health system. Learn more.

Because taxpayer dollars fund Medicaid, changes in billing at the local level reveal how public health care resources are distributed within a community.

The “National Codes Established for State Medicaid Agencies” category includes Medicaid-billed services grouped by care type, using standard HCPCS and CPT coding protocols. Each code was assigned to a single service group with consistent code prefixes and ranges, ensuring reliable service group analysis with no double counting or rank distortion over time.

Although overall Medicaid spending increased in several categories, National Codes Established for State Medicaid Agencies ranked second for total payments in Diamond Bar in 2024.

Across California, this service category was first by total Medicaid payments in 2024.

Looking over the five-year span prior to 2024, Diamond Bar Medicaid payments in this category increased by $1,224,926, a 133.5% jump. Growth quickened during certain periods, with considerable annual increases noted in 2023 and 2020.

Spending within this category was distributed citywide, but a small number of ZIP codes accounted for much of the payment activity. ZIP code 91765 led with $2,142,243 in Medicaid payments in 2024, amounting to 100% of the city’s total for this category that year.

Within National Codes Established for State Medicaid Agencies services, Medicaid payments largely centered on relatively few billing codes.

Between 2024 and 2023, Medicaid payments in this category in Diamond Bar posted a 15.6% increase. In comparison, overall Medicaid claims citywide saw a 40.7% change during this timeframe.

Data from the Centers for Medicare & Medicaid Services shows that combined federal and state Medicaid spending reached about $871.7 billion in fiscal year 2023, representing roughly 18% of all national health expenditures—a sharp increase from around $613.5 billion in 2019.

This change reflects a growth rate of approximately 40% over a few years, attributed to both expanded Medicaid participation and higher service use during and after the pandemic.

Recent federal budget actions, including the “One Big Beautiful Bill Act,” enacted in 2025, introduced sizable reductions to federal Medicaid outlays and new requirements such as work obligations and greater cost-sharing. The policies are projected to decrease federal Medicaid support by over $1 trillion through the next decade and could increase state responsibility for funding, potentially restricting federal Medicaid growth even as the program still covers tens of millions nationwide.

Note: HCPCS codes are shown for context within the category. Category totals and rankings in this article are based on standardized service groupings rather than individual billing codes.

Information in this article was obtained from the U.S. Department of Health and Human Services Medicaid Provider Spending database. The source data can be found here.