One of many, many citations: [0]. This is not something surprising, it's been ongoing since before the USA was a country.

[0] https://www.mayoclinicproceedings.org/article/S0025-6196%282...

In emergency departments, Black patients are prescribed opioids for acute pain at a lower rate than White patients with matched chief concerns.4

Discrepancies in prescriptions for chronic pain therapies have also been identified in Veterans Administration and Medicaid payer databases, and several retrospective cohort studies have shown persistent underprescribing of analgesics to Black patients.6,7

White medical trainees, reflecting the general population, can have false beliefs about biologic differences between Black and White patients (eg, “Black patients feel less pain”), and this racial bias leads to inaccurate pain diagnoses and treatment recommendations.8

In anesthesiology and pain medicine, use of regional anesthesia for joint replacement surgery is applied less frequently in Black patients and the underinsured.9

This also holds true in the implantation of spinal cord stimulation for the treatment of postlaminectomy syndrome.10

Among patients with occupational low back injuries, Black patients incur lower treatment costs than their White counterparts and are provided fewer health care interventions, including surgery.11

Perceived discrimination results in psychological distress, and a US population–based study has demonstrated a dose-response relationship between psychological distress and chronic pain.

from the mayo link