HTN is the medical abbreviation meaning hypertension or high blood pressure.
BP
HOTN
It could be Human papillomavirus.
PenicillinPCN usually means Primary Care NetworkDepending on how it is used, it is the medical abbreviation of penicillin, or it could bePrimary Care Network.
The only one I could think of would be BP, but I don't believe there is an abbreviation for it.
The two letter abbreviation is MTOr, you could also write MONT.
It depends on the context but it could mean hemorrhage.
It could stand for Micobacterium Avium Complex
Depending on context, it could mean polymyalgia rheumatica or patient medical report.
Clonidine would not normally be abbreviated, as the risk of misinterpreting an abbreviation for a drug could have serious results.
Anything that could cause poor blood circulation, even hypertension or anemia.
El (pronounced "L") since you say El as the letter L, you could just use the abbreviation L
FTC is an uncommon abbreviation in the healthcare field. It could mean the following: Frames to Come (optometry) Follicular Thyroid Carcinoma (oncology)
If you were sending a letter to John Smith, MD - you could address the letter to Dr. Smith.