Let's say that I incur a cost of 15000 rs on a dental surgery in the month of August alone. Does this mean that I can submit this single expense for my medical reimbursement at the end of the financial year?

Yes

What all medical expenses can be claimed

Almost everything, Doctors fee, medicines, tests, surgery, etc ofcourse No glasses, contact lens etc. Certain cosmetic items that are also medicinal, can only be submitted with doctors prescription.

If I come under the 30% tax slab

Yes

Are there any specific clauses

Check with your company

Let's say that I incur a cost of 15000 rs on a dental surgery in the month of August alone. Does this mean that I can submit this single expense for my medical reimbursement at the end of the financial year?

Yes

What all medical expenses can be claimed

Almost everything, Doctors fee, medicines, tests, surgery, etc ofcourse No glasses, contact lens etc. Certain cosmetic items that are also medicinal, can only be submitted with doctors prescription.

If I come under the 30% tax slab

Yes

Are there any specific clauses

Check with your company

Edit to answer comment:
15000*30/100 = 4500. The calculation can be more exact as you also pay cess of 3%. Further if your income is above 1 Crore, a surcharge of 10% if total tax is above threshold. So essentially 33% or 1/3 is the tax. Thus 1.5 L under 80 C for ease of calculation would be 50,000. Else it would be 46350.