OCD CDRH is an acronym for "Office of Combination Products," a regulatory body within the US Food and Drug Administration (FDA). The spelling of this acronym is straightforward when using the International Phonetic Alphabet (IPA) transcription system: 'oʊsiːdi siːdiɑːr eɪtʃ' (o-si-dee see-dee-aytch). The combination of each letter and its corresponding sound creates the pronunciation of this medical term, indicating the importance of correct spelling and pronunciation in the healthcare industry.