Changing the nature created by Allah is one of the sins that Satan provokes for; plastic surgery and changing gender included.
4:116 An-Nisaa
إِنَّ اللَّهَ لَا يَغْفِرُ أَنْ يُشْرَكَ بِهِ وَيَغْفِرُ مَا دُونَ ذَٰلِكَ لِمَنْ يَشَاءُ ۚ وَمَنْ يُشْرِكْ بِاللَّهِ فَقَدْ ضَلَّ ضَلَالًا بَعِيدًا
Verily! Allah forgives not (the sin of) setting up partners in worship with Him, but He forgives whom he pleases sins other than that, and whoever sets up partners in worship with Allah, has indeed strayed far away.
4:117 An-Nisaa
إِنْ يَدْعُونَ مِنْ دُونِهِ إِلَّا إِنَاثًا وَإِنْ يَدْعُونَ إِلَّا شَيْطَانًا مَرِيدًا
They (all those who worship others than Allah) invoke nothing but female deities besides Him (Allah), and they invoke nothing but Shaitan (Satan), a persistent rebel!
4:118 An-Nisaa
لَعَنَهُ اللَّهُ ۘ وَقَالَ لَأَتَّخِذَنَّ مِنْ عِبَادِكَ نَصِيبًا مَفْرُوضًا
Allah cursed him. And he [Shaitan (Satan)] said: "I will take an appointed portion of your servants;
4:119 An-Nisaa
وَلَأُضِلَّنَّهُمْ وَلَأُمَنِّيَنَّهُمْ وَلَآمُرَنَّهُمْ فَلَيُبَتِّكُنَّ آذَانَ الْأَنْعَامِ وَلَآمُرَنَّهُمْ فَلَيُغَيِّرُنَّ خَلْقَ اللَّهِ ۚ وَمَنْ يَتَّخِذِ الشَّيْطَانَ وَلِيًّا مِنْ دُونِ اللَّهِ فَقَدْ خَسِرَ خُسْرَانًا مُبِينًا
Verily, I will mislead them, and surely, I will arouse in them false desires; and certainly, I will order them to slit the ears of cattle, and indeed I will order them to change the nature created by Allah." And whoever takes Shaitan (Satan) as a Wali (protector or helper) instead of Allah, has surely suffered a manifest loss.
4:120 An-Nisaa
يَعِدُهُمْ وَيُمَنِّيهِمْ ۖ وَمَا يَعِدُهُمُ الشَّيْطَانُ إِلَّا غُرُورًا
He [Shaitan (Satan)] makes promises to them, and arouses in them false desires; and Shaitan's (Satan) promises are nothing but deceptions.
4:121 An-Nisaa
أُولَٰئِكَ مَأْوَاهُمْ جَهَنَّمُ وَلَا يَجِدُونَ عَنْهَا مَحِيصًا
The dwelling of such (people) is Hell, and they will find no way of escape from it.
4:122 An-Nisaa
وَالَّذِينَ آمَنُوا وَعَمِلُوا الصَّالِحَاتِ سَنُدْخِلُهُمْ جَنَّاتٍ تَجْرِي مِنْ تَحْتِهَا الْأَنْهَارُ خَالِدِينَ فِيهَا أَبَدًا ۖ وَعْدَ اللَّهِ حَقًّا ۚ وَمَنْ أَصْدَقُ مِنَ اللَّهِ قِيلًا
But those who believe (in the Oneness of Allah - Islamic Monotheism) and do deeds of righteousness, We shall admit them to the Gardens under which rivers flow (i.e. in Paradise) to dwell therein forever. Allah's Promise is the Truth, and whose words can be truer than those of Allah? (Of course, none).
4:123 An-Nisaa
لَيْسَ بِأَمَانِيِّكُمْ وَلَا أَمَانِيِّ أَهْلِ الْكِتَابِ ۗ مَنْ يَعْمَلْ سُوءًا يُجْزَ بِهِ وَلَا يَجِدْ لَهُ مِنْ دُونِ اللَّهِ وَلِيًّا وَلَا نَصِيرًا
It will not be in accordance with your desires (Muslims), nor those of the people of the Scripture (Jews and Christians), whosoever works evil, will have the recompense thereof, and he will not find any protector or helper besides Allah.
4:124 An-Nisaa
وَمَنْ يَعْمَلْ مِنَ الصَّالِحَاتِ مِنْ ذَكَرٍ أَوْ أُنْثَىٰ وَهُوَ مُؤْمِنٌ فَأُولَٰئِكَ يَدْخُلُونَ الْجَنَّةَ وَلَا يُظْلَمُونَ نَقِيرًا
And whoever does righteous good deeds, male or female, and is a true believer in the Oneness of Allah, such will enter Paradise and not the least injustice, even to the size of a Naqira (speck on the back of a date-stone), will be done to them.
4:125 An-Nisaa
وَمَنْ أَحْسَنُ دِينًا مِمَّنْ أَسْلَمَ وَجْهَهُ لِلَّهِ وَهُوَ مُحْسِنٌ وَاتَّبَعَ مِلَّةَ إِبْرَاهِيمَ حَنِيفًا ۗ وَاتَّخَذَ اللَّهُ إِبْرَاهِيمَ خَلِيلًا
And who can be better in religion than one who submits his face (himself) to Allah (i.e. follows Allah's Religion of Islamic Monotheism); and he is a Muhsin (a good-doer - see V. 2:112). And follows the religion of Ibrahim (Abraham) Hanifa (Islamic Monotheism - to worship none but Allah Alone). And Allah did take Ibrahim (Abraham) as a Khalil (a close friend).
4:126 An-Nisaa
وَلِلَّهِ مَا فِي السَّمَاوَاتِ وَمَا فِي الْأَرْضِ ۚ وَكَانَ اللَّهُ بِكُلِّ شَيْءٍ مُحِيطًا
And to Allah belongs all that is in the heavens and all that is in the earth. And Allah is Ever Encompassing all things.