top-level member mapping?

I have this model,

  public class PatientRegistry
    {
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        [Display(Name = "Record Id")]
        public long RecordId { get; set; }
        [Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
        [Display(Name = "Patient File Number")]
        public long PatientFileId { get; set; }
        [Required, StringLength(50)]
        [Display(Name = "First Name")]
        public string FirstName { get; set; }
        public int CountryCodeId { get; set; }
        public Country CountryCode { get; set; }
        public int CellProvider { get; set; }
        [Required, StringLength(15)]
        public string PatientMobileNo { get; set; }
        [StringLength(20)]
        public string PatientLandLine { get; set; }
}

and my view model is,

public class PatientRegistryViewModel {

        public long PatientFileId { get; set; }

        [Required]
        [Display (Name = "First Name")]
        public string FirstName { get; set; }
        [Required]
        [Display (Name = "Last Name")]
        public string LastName { get; set; }
        public string AliasName { get; set; }

        [Required]
        [Display (Name = "Date of birth")]
        public DateTime PatientDob { get; set; }

        public MobilePhoneNumberViewModel PatientMobileNo { get; set; }
}

my MobilePhoneNumberViewModel looks like,

  public class MobilePhoneNumberViewModel {

        [Required]
        [Display (Name = "Country Code Id")]
        public int CountryCodeId { get; set; }

        [Required]
        [Display (Name = "Cell Provider")]
        public int CellProvider { get; set; }

        [Required]
        [Display (Name = "Mobile No")]
        public string PatientMobileNo { get; set; }
    }

my maps are,

 CreateMap<PatientRegistry, PatientRegistryViewModel> ()
                .ForMember (pr => pr.GenderId, opt => opt.MapFrom (m => m.Gender.Id))
                .ForMember (pr => pr.StatusId, opt => opt.MapFrom (m => m.Status.Id))
                .ForMember (pr => pr.CountryId, opt => opt.MapFrom (m => m.Country.Id))
                .ForMember (pr => pr.StateId, opt => opt.MapFrom (m => m.State.Id))
                .ForMember (pr => pr.CityId, opt => opt.MapFrom (m => m.City.Id))
                .ForMember (pr => pr.NationalityId, opt => opt.MapFrom (m => m.Nationality.Id))
                .ForMember (pr => pr.OccupationId, opt => opt.MapFrom (m => m.Occupation.Id))
                .ForMember (pr => pr.MaritalStatusId, opt => opt.MapFrom (m => m.MaritalStatus.Id))
                .ForMember (dest => dest.PatientMobileNo.PatientMobileNo, opt => opt.MapFrom (src => src.PatientMobileNo))
                .ForMember (pr => pr.PatientMobileNo.CellProvider, opt => opt.MapFrom (m => m.CellProvider))
                .ForMember (pr => pr.PatientMobileNo.CountryCodeId, opt => opt.MapFrom (m => m.CountryCodeId))
                .ForMember (pr => pr.EthnicityId, opt => opt.MapFrom (m => m.Ethnicity.Id))
                .ForMember (pr => pr.Partners, opt => opt.MapFrom (m => m.Partners));

and

     CreateMap<PatientRegistry, MobilePhoneNumberViewModel> ()
                .ForMember (pr => pr.CountryCodeId, opt => opt.MapFrom (m => m.CountryCodeId))
                .ForMember (pr => pr.CellProvider, opt => opt.MapFrom (m => m.CellProvider))
                .ForMember (pr => pr.PatientMobileNo, opt => opt.MapFrom (m => m.PatientMobileNo));

(I shortened my models for this question)

I keep getting this error,

Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentException: Expression 'dest => dest.PatientMobileNo.PatientMobileNo' must resolve to top-level member and not any child object's properties. Use a custom resolver on the child type or the AfterMap option instead.

if I remove 

                .ForMember (dest => dest.PatientMobileNo.PatientMobileNo, opt => opt.MapFrom (src => src.PatientMobileNo))
                .ForMember (pr => pr.PatientMobileNo.CellProvider, opt => opt.MapFrom (m => m.CellProvider))
                .ForMember (pr => pr.PatientMobileNo.CountryCodeId, opt => opt.MapFrom (m => m.CountryCodeId))

AutoMapperMappingException: Error mapping types.

Mapping types:
PatientRegistry -> PatientRegistryViewModel
ArtNgCore.Core.Models.ClinicCore.PatientRegistry -> ArtNgCore.Controllers.ViewModels.ClinicCoreViewModels.PatientRegistryViewModel

Type Map configuration:
PatientRegistry -> PatientRegistryViewModel
ArtNgCore.Core.Models.ClinicCore.PatientRegistry -> ArtNgCore.Controllers.ViewModels.ClinicCoreViewModels.PatientRegistryViewModel

Property:
PatientMobileNo

whats going on here?