def METHOD_NAME(self):
    """
    Constructs CMR API URL based on the concept ID.
    It assumes that the concept_id is already valid.
    Returns:
        (str) The URL constructed based on the concept ID
    """
    extension = Downloader.FORMAT_MAP.get(self.metadata_format, "echo10")
    base_url = Downloader.BASE_URL.format(cmr_host=self.cmr_host)
    version = f"/{self.version}" if self.version else ""
    constructed_url = f"{base_url}{self.concept_id}{version}.{extension}"
    return constructed_url