The word 'diagnostician' is correct and is commonly used in written English.
It is typically used to refer to a medical professional who focuses on accurately diagnosing a patient's condition or illness. For example: The diagnostician concluded that the patient was suffering from a severe case of influenza.
These texts offered a different picture from that of the Middle Ages, one that emphasized Galen as a clinician, a diagnostician, and above all, an anatomist.
A skilled diagnostician must know the normal appearance of an affected plant species, its local air and soil environment, the cultural conditions under which it is growing, the pathogens described for the area, and the disease-developing potential of the pathogen.
Asked to describe her technique as a diagnostician, she told New York, "I'm a very methodical person; I do all the tests".
Courtesy, urbanity, good humor, wealth, self-satisfaction, and other destructive elements of civilization had descended upon Liston like the Asian flu, and Ibn Khaldun, that matchless Tunisian diagnostician, would have instantly recognized the symptoms of what is in store for him.
"Sometimes it is enough to be a diagnostician," he said.
Kalanithi was too talented a diagnostician to concur.
Even as he turns back toward Baxter in surprise, and even as he sees, or senses, what's coming toward him at such speed, there remains in a portion of his thoughts a droning, pedestrian diagnostician who notes poor self-control, emotional lability, explosive temper, suggestive of reduced levels of gaba and excessive glutamate among the appropriate binding sites on striatal neurons.
Klass has been the program's sole diagnostician from the start.
Mary Norris, who joined The New Yorker in 1978 and has worked on untold numbers of my pieces, is a verbal diagnostician I would turn to for a first, second, or third opinion on just about anything.
Some sixty years later, another great poet and cultural diagnostician — French, and therefore as licensed to be hyperbolic as the English are prone to understate — offered a more heated version of the same charge.
He's a great diagnostician, and he's got a great bedside manner.
