Federal Health and Human Services Secretary Kathleen Sebelius visits Phoenix on Thursday to promote President Barack Obama's health law amid complaints about how implementation has begun.

The former Kansas governor who is the Obama administration's public point person on the health law's implementation will tour an HHS call center in north Phoenix Thursday afternoon.

She'll then go to a health center where so-called "navigators" who have been trained to educate people about enrolling for coverage.

The visit will take place amid intense scrutiny of the website's startup. Computer problems have kept many consumers from signing up through new online markets.

Sebelius has said her agency is bringing in more experts and specialists from government and industry to improve the signup system.