A new field pea cultivar designated PP-1804-4, seeds of field pea cultivar PP-1804-4, plants of field pea cultivar PP-1804-4, plant parts of field pea cultivar PP-1804-4, and methods for producing a field pea plant produced by crossing field pea cultivar PP-1804-4 with itself or with another field pea cultivar, and the creation of variants by mutagenesis or transformation of field pea cultivar PP-1804-4 are disclosed. Commercial commodity products from the seeds of field pea cultivar PP-1804-4, food products comprising these commercial commodity products, and methods for making the same are also disclosed.