A Montgomery County Circuit Court judge yesterday acquitted two doctors who were charged with billing the state for some $6,000 worth of treatments the government said were never performed.

Judge John J. Mitchell ended the six-day trial by ruling there was insufficient evidence to prove that Dr. James L. Hooper, 50, of Sandy Spring and Dr. Melvin Kordon, 45, of Columbia broke the law.

The government attempted to show that the two doctors instructed employes at the Deer Park Medical Center in Gaithersburg to submit 330 fraudulent Medicaid claims during 1972 and 1977.

The doctors' attorneys argued that the physicians were among the few who would accept poor patients on Medicaid, which meant their practices were overloaded and sometimes suffered from jumbled paperwork.

The doctors' attorneys said they were prepared to call 107 witnesses to vouch for the doctors' professional integrity and conduct. James R. Miller, Dr. Hooper's attorney, said the doctors have been through a "tremendous ordeal."

"Now these men can get back to their medical practices and their families," Miller said.

The charges against the two doctors were prepared by the Medicaid fraud control unit of the Maryland attorney general's office, one of 30 such units across the country.