Six urgent care facilities owned by Dr. Robert C. Amster have filed for bankruptcy, according to court documents.

The bankruptcies, filed Wednesday, Aug. 2, include Cypress Urgent Care; Hoag Urgent Care – Anaheim Hills; Hoag Urgent Care – Huntington Harbour; Hoag Urgent Care – Orange; Hoag Urgent Care –Tustin; and Laguna Dana Urgent Care.

Four of the six facilities are leased from Hoag Memorial Hospital Presbyterian but are not run by the hospital, according to Amster’s lawyer.

“Six entities, none of which are owned, operated or have common interests or control by Hoag have commenced Chapter 11 proceedings,” Hoag spokeswoman Nina Robinson said.

Amster is the founder of Your Neighborhood Urgent Care, which has 10 urgent care centers in Southern California, according to its website. The other four include two in San Diego and La Mesa and Chula Vista.

Amster’s attorney Ashley M. McDow said only the six centers in Orange County were filing for bankruptcy. Hoag, she said, was the landlord for four of the centers and “someone we have equipment deals with.”

The urgent cares have amassed $1 million to $10 million in liabilities, according to the filings.

The Orange center closed in 2016; the other five will remain open and patient care will not be interrupted, she added.

“Dr. Amster will still be providing service. Our intention is to reorganize and stay open during the bankruptcy, patient care should be uninterrupted,” McDow said.

McDow does not expect any of the existing centers to close as a result of the bankruptcy. “It is primarily to restructure our affairs with the landlord and the bank,” she said of the decision to file for Chapter 11.

Adam D. Stein-Sapir, a portfolio manager at Pioneer Funding Group, said it is beneficial for centers to continue their operations during bankruptcy.

“Everybody realizes that the value of the businesses is maximized by the business staying in operation and serving patients and generating revenue,” Stein-Sapir said. “Turning the lights off and stopping operations would be a value destructive option.”

None of the Hoag-owned urgent care facilities in Aliso Viejo, Irvine (Los Olivos, San Canyon, Woodbridge, Woodbury), Huntington Beach and Newport Beach are part of the bankruptcy proceedings.

Stein-Sapir said changing reimbursement rates have led other healthcare groups to file for bankruptcy.

“These hospitals take a lot of government care and patients. When reimbursement rates change, it can have a significant impact on the hospital and its operations. There have been a lot of hospital bankruptcies recently and that’s one of the reasons,” he said.

Recent hospital bankruptcies include Gardens Regional Hospital and Medical Center in Hawaiian Gardens. It closed Feb. 1 after filing for Chapter 11 in 2016.

McDow said while reimbursement rate changes are a problem she has seen in other bankruptcy cases, the six Amster bankruptcies are more about reorganizing to remain open.