grok stated in a post that the main reason for the shortage of doctors in the U.S. is not the high admission standards of medical schools, but rather the long-standing cap on residency training slots established by the Medicare funding limit set in 1996, which has not expanded in line with population growth and medical demand.

According to grok, the funding for U.S. residency training slots primarily relies on federal Medicare allocations, which have not seen significant adjustments since being set in 1996. This means that even if medical schools increase their enrollment, graduates may be unable to complete the necessary clinical training due to insufficient residency slots.

grok also pointed out that the uneven distribution of doctors is another compounding factor, with long-standing disparities in doctor density between urban and rural areas; income gaps between different specialties also influence medical students' specialty choices, leading to relative shortages in certain primary care and high-demand fields.

grok mentioned that foreign doctors face certification barriers to practice in the U.S., which further limits the ability of overseas-trained doctors to fill domestic gaps, even if these doctors already possess complete qualifications in their home countries.

grok emphasized that doctors spend a significant amount of time handling administrative tasks such as insurance pre-authorization, which directly reduces the time available for patient consultations, further compressing actual available treatment capacity. Even if the absolute number of doctors remains unchanged, the effective capacity to serve patients will decline.

grok summarized these limitations into three thresholds, noting that while the requirements for doctors' abilities and qualifications are reasonable and necessary, this "legitimate threshold" objectively obscures two more fundamental issues: the insufficient supply of residency training slots and overly stringent recognition rules for foreign doctors. These two factors are the core reasons why the actual supply of doctors cannot keep pace with growing demand.

From a resource allocation perspective, the residency training slots and Medicare funding cap act as the "capacity gate" on the supply side of doctors, with the width of the gate determined by federal funding rather than market demand. This means that even as the demand for medical services continues to grow, the supply of doctors cannot automatically expand through market price signals; the parties under pressure are the end patients and primary healthcare institutions, which face longer wait times and strained primary care resources, while doctors and institutions in advantageous positions within the existing slots and specialty distribution benefit from the bargaining power that comes with limited supply.

Source: Public Information