Holly M. Brannen APRN My Medical Specialty: CardiologyRelated Departments: Cardiovascular Care Female | Speaks: English Board Certification American Academy of Nurse Practitioners This Provider Practices at: Cotton O'Neil Manhattan Cardiology1133 College AveSuite E-210Manhattan, KS 66502-2770(785) 537-2651Fax: (785) 565-2841View Google Map Suggest An Update Credential change? New location?Enter provider updates below.Close Your Email* Update DetailsNameThis field is for validation purposes and should be left unchanged. This iframe contains the logic required to handle Ajax powered Gravity Forms. Need an appointment? Log into MyChart Don't have MyChart? Sign up today.