1. PREP (Preposition)

Go to the hospital! Don't go home. In the hospital, the nurses will take care of you.

2. SVA (Subject-Verb Agreement) 
Mt. Sinai Hospital's anesthetists, oncologist, and radiologists are are world-famous.Do you know anyone who has won the Nobel Prize in medicine?
3. CS (Coma Splice)
Modern diseases include cancer, obesity, and AIDS. They affect thousand of people in North America. However, just because you don't read about diseases like malaria and smallpox in the news, and doesn't mean they don't exist anymore.
4. FRAG (Fragment)
Although the family doctor was busy, the receptionist gave Thiru an appointment because Thiru's situation was very urgent. Pushpa is not a very healthy woman. Kanesh is healthier.
5. RUN-ON SENTENCE
The doctor ordered a battery of tests which Arumugam had to undergo. These included a urine test, a blood test, an ECG, and a stool test. There was also a prescription for pain medication. When Arumugam thought about it his headache worsened.
6. TENSE

I'm sorry I don't come on the field trip. I'm going back to Brunei. By next Saturday, I will have complete my full course of antibiotics. Last month, I had 15 medical appointments.

7. PERIODS/COMMAS/CAPS/SPACES

Family doctors are crazy. I know doctor who never refer you to specialists. I also know those who refer you for minor headaches, or check their iPhones for the least information. That's why I prefer to go to the walk-in clinic.

8. PROPER NOUNS

Along University Boulevard in Downtown Toronto,  there are so many health institutions, including Mount Sinai Hospital, Sick Kids Hospital, CAMH, Princess Margaret Hospital, and Toronto General Hospital.

9. SPELLING

This hospital has patients but many psychiatrists, psychologist, cardiologists, surgeons, gynecologists, acupuncturists  other specialists doctors. Is hard to find any specialist, physicians there.