Kaiser Permanente of Georgia remains the highest-ranked private health plan in the state for the 10th consecutive year, according to the National Committee for Quality Assurance.

The new NCQA ratings put Kaiser at No. 19 among 507 plans nationally. The next highest Georgia insurer was a Humana plan, at 147, and Aetna, at 151.

NCQA, managed care’s major accrediting organization, evaluates health plans based on customer satisfaction, treatment and prevention.

It also ranked 136 Medicaid managed care plans nationally. For the three Georgia plans serving Medicaid patients, Amerigroup was 32; Peach State ranked 43; and WellCare, 59.

The nonprofit Kaiser serves more than 260,000 Georgians through 30 medical facilities in a 28-county service area in metro Atlanta and Athens.

Kaiser recently was awarded a state contract to offer an HMO product to State Health Benefit Plan members in metro Atlanta.

The NCQA rankings use a 1-to-5 scale, with 5 being the highest. Kaiser Permanente of Georgia earned a 5 in prevention, a 5 in treatment, and a 4 in consumer experience.

“We offer something different in the health care marketplace,” Kerry Kohnen, president of Kaiser Permanente of Georgia, said in a statement. “We bring care and coverage together to make it easy for people to get the services they need. Our members appreciate the added convenience.”

The rankings will be published in Consumer Reports magazine.

Separately, the Atlanta Business Chronicle reported Friday that Kaiser of Georgia has cut about 30 non-medical jobs, mostly administrative and mid-level manager positions, at the organization’s main office in Atlanta’s Buckhead district.

“In an effort to ensure we continue to deliver high-quality, affordable health care to our members, we continually assess our administrative costs and look for opportunities to streamline work,’’ said Jim Driscoll, a Kaiser Permanente spokesman, in a statement. “The reductions will not affect our ability to continue to deliver high-quality patient care.”