diff --git a/Medical/MedicalPostgresqlDatabase/AbstractPostgresqlStorage.cs b/Medical/MedicalPostgresqlDatabase/AbstractPostgresqlStorage.cs
index 0966228..9d5f33a 100644
--- a/Medical/MedicalPostgresqlDatabase/AbstractPostgresqlStorage.cs
+++ b/Medical/MedicalPostgresqlDatabase/AbstractPostgresqlStorage.cs
@@ -1,29 +1,84 @@
 using MedicalDatabaseContracts;
 using MedicalDatabaseContracts.Models;
 using Npgsql;
+using System.Diagnostics;
 
 namespace MedicalPostgresqlDatabase
 {
     public abstract class AbstractPostgresqlStorage<T> : IStorage<T> where T : AbstractModel
     {
+        protected readonly string TABLE_NAME;
+        protected readonly string PRIMARY_KEY_COLUMN_NAME;
+
+        protected AbstractPostgresqlStorage(string tableName, string primaryKeyColumnName)
+        {
+            TABLE_NAME = tableName;
+            PRIMARY_KEY_COLUMN_NAME = primaryKeyColumnName;
+        }
+
+        protected abstract T CreateEntityFromReader(NpgsqlDataReader reader);
+
         public virtual void Delete(int id)
         {
             long elapsedMilliseconds;
             Delete(id, out elapsedMilliseconds);
         }
-        public abstract void Delete(int id, out long elapsedMilliseconds);
+        public virtual void Delete(int id, out long elapsedMilliseconds)
+        {
+            using var connection = GetConnection();
+            connection.Open();
+            using var cmd = new NpgsqlCommand($"DELETE FROM {TABLE_NAME} WHERE {PRIMARY_KEY_COLUMN_NAME} = @id", connection);
+            cmd.Parameters.AddWithValue("@id", id);
+            Stopwatch stopwatch = new();
+            stopwatch.Start();
+            cmd.ExecuteNonQuery();
+            stopwatch.Stop();
+            elapsedMilliseconds = stopwatch.ElapsedMilliseconds;
+        }
         public virtual T? Get(int id)
         {
             long elapsedMilliseconds;
             return Get(id, out elapsedMilliseconds);
         }
-        public abstract T? Get(int id, out long elapsedMilliseconds);
+        public virtual T? Get(int id, out long elapsedMilliseconds)
+        {
+            using var connection = GetConnection();
+            connection.Open();
+            using var cmd = new NpgsqlCommand($"SELECT * FROM {TABLE_NAME} WHERE {PRIMARY_KEY_COLUMN_NAME} = @id", connection);
+            cmd.Parameters.AddWithValue("@id", id);
+            Stopwatch stopwatch = new();
+            stopwatch.Start();
+            using var reader = cmd.ExecuteReader();
+            stopwatch.Stop();
+            elapsedMilliseconds = stopwatch.ElapsedMilliseconds;
+            if (reader.Read())
+            {
+                return CreateEntityFromReader(reader);
+            }
+            return null;
+        }
         public virtual List<T> GetAll()
         {
             long elapsedMilliseconds;
             return GetAll(out elapsedMilliseconds);
         }
-        public abstract List<T> GetAll(out long elapsedMilliseconds);
+        public virtual List<T> GetAll(out long elapsedMilliseconds)
+        {
+            var items = new List<T>();
+            using var connection = GetConnection();
+            connection.Open();
+            using var cmd = new NpgsqlCommand($"SELECT * FROM {TABLE_NAME} ORDER BY {PRIMARY_KEY_COLUMN_NAME}", connection);
+            Stopwatch stopwatch = new();
+            stopwatch.Start();
+            using var reader = cmd.ExecuteReader();
+            stopwatch.Stop();
+            elapsedMilliseconds = stopwatch.ElapsedMilliseconds;
+            while (reader.Read())
+            {
+                items.Add(CreateEntityFromReader(reader));
+            }
+            return items;
+        }
         public virtual void Insert(T item)
         {
             long elapsedMilliseconds;
diff --git a/Medical/MedicalPostgresqlDatabase/Storages/DoctorsStorage.cs b/Medical/MedicalPostgresqlDatabase/Storages/DoctorsStorage.cs
new file mode 100644
index 0000000..eb996b0
--- /dev/null
+++ b/Medical/MedicalPostgresqlDatabase/Storages/DoctorsStorage.cs
@@ -0,0 +1,64 @@
+using MedicalDatabaseContracts.Models;
+using Microsoft.Extensions.Logging;
+using Npgsql;
+using System.Diagnostics;
+
+namespace MedicalPostgresqlDatabase.Storages
+{
+    public class DoctorsStorage : AbstractPostgresqlStorage<Doctor>
+    {
+        private ILogger _logger;
+        public DoctorsStorage(ILogger<DoctorsStorage> logger) : base("doctors", "doctor_id")
+        {
+            _logger = logger;
+        }
+
+        protected override Doctor CreateEntityFromReader(NpgsqlDataReader reader)
+        {
+            return new Doctor
+            {
+                Id = Convert.ToInt32(reader.GetOrdinal("doctor_id")),
+                Name = Convert.ToString(reader.GetOrdinal("name")),
+                Surname = Convert.ToString(reader.GetOrdinal("surname")),
+                Patronymic = Convert.ToString(reader.GetOrdinal("patronymic")),
+                PhoneNumber = Convert.ToString(reader.GetOrdinal("phone_number")),
+                SpecializationId = Convert.ToInt32(reader.GetOrdinal("specializaton_id"))
+            };
+        }
+
+        public override void Insert(Doctor item, out long elapsedMilliseconds)
+        {
+            using var connection = GetConnection();
+            connection.Open();
+            using var cmd = new NpgsqlCommand("INSERT INTO doctors (doctor_id, name, surname, patronymic, phone_number, specialization_id) VALUES ((nextval('doctors_id_seq')), @name, @surname, @patronymic, @phone_number, @specialization_id)", connection);
+            cmd.Parameters.AddWithValue("@name", item.Name);
+            cmd.Parameters.AddWithValue("@surname", item.Surname);
+            cmd.Parameters.AddWithValue("@patronymic", item.Patronymic);
+            cmd.Parameters.AddWithValue("@phone_number", item.PhoneNumber);
+            cmd.Parameters.AddWithValue("@specialization_id", item.SpecializationId);
+            Stopwatch stopwatch = new();
+            stopwatch.Start();
+            cmd.ExecuteNonQuery();
+            stopwatch.Stop();
+            elapsedMilliseconds = stopwatch.ElapsedMilliseconds;
+        }
+
+        public override void Update(Doctor item, out long elapsedMilliseconds)
+        {
+            using var connection = GetConnection();
+            connection.Open();
+            using var cmd = new NpgsqlCommand($"UPDATE doctors SET name = @name, surname = @surname, patronymic = @patronymic, phone_number = @phone_number, specialization_id = @specialization_id, WHERE {PRIMARY_KEY_COLUMN_NAME} = @id", connection); ;
+            cmd.Parameters.AddWithValue("@id", item.Id);
+            cmd.Parameters.AddWithValue("@name", item.Name);
+            cmd.Parameters.AddWithValue("@surname", item.Surname);
+            cmd.Parameters.AddWithValue("@patronymic", item.Patronymic);
+            cmd.Parameters.AddWithValue("@phone_number", item.PhoneNumber);
+            cmd.Parameters.AddWithValue("@specialization_id", item.SpecializationId);
+            Stopwatch stopwatch = new();
+            stopwatch.Start();
+            cmd.ExecuteNonQuery();
+            stopwatch.Stop();
+            elapsedMilliseconds = stopwatch.ElapsedMilliseconds;
+        }
+    }
+}