diff --git a/lib/consulkit/client.rb b/lib/consulkit/client.rb
index 06b05f0..265a01c 100644
--- a/lib/consulkit/client.rb
+++ b/lib/consulkit/client.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'consulkit/configurable'
+require 'consulkit/client/health'
 require 'consulkit/client/kv'
 require 'consulkit/client/session'
 
@@ -9,6 +10,7 @@ module Consulkit
   class Client
 
     include Consulkit::Configurable
+    include Consulkit::Client::Health
     include Consulkit::Client::KV
     include Consulkit::Client::Session
 
diff --git a/lib/consulkit/client/health.rb b/lib/consulkit/client/health.rb
new file mode 100644
index 0000000..2b0d75f
--- /dev/null
+++ b/lib/consulkit/client/health.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module Consulkit
+  class Client
+    # Methods for querying health checks registered with Consul.
+    module Health
+
+      # Returns the list of service instances providing the given service, including health check
+      # information.
+      #
+      # @see https://developer.hashicorp.com/consul/api-docs/health#list-service-instances-for-service
+      #
+      # @param key [String] the key to read.
+      # @option query_params [Hash] optional query parameters.
+      # @option query_params [Boolean] :passing
+      # @option query_params [String] :filter
+      #
+      # @yield [Faraday::Response] The response from the underlying Faraday library.
+      #
+      # @return [Array<Hash>]
+      def health_list_service_instances(service, query_params = {})
+        response = get("/v1/health/service/#{service}", query_params)
+
+        if block_given?
+          yield response
+        else
+          response.body
+        end
+      end
+
+    end
+  end
+end
diff --git a/spec/cassettes/Consulkit_Client_Health/health_list_service_instances/lists_the_instances.yml b/spec/cassettes/Consulkit_Client_Health/health_list_service_instances/lists_the_instances.yml
new file mode 100644
index 0000000..e104b08
--- /dev/null
+++ b/spec/cassettes/Consulkit_Client_Health/health_list_service_instances/lists_the_instances.yml
@@ -0,0 +1,119 @@
+---
+http_interactions:
+- request:
+    method: get
+    uri: http://localhost:8500/v1/health/service/consul
+    body:
+      encoding: US-ASCII
+      string: ''
+    headers:
+      User-Agent:
+      - Faraday v2.9.0
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+      Accept:
+      - "*/*"
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json
+      Vary:
+      - Accept-Encoding
+      X-Consul-Default-Acl-Policy:
+      - allow
+      X-Consul-Effective-Consistency:
+      - leader
+      X-Consul-Index:
+      - '14'
+      X-Consul-Knownleader:
+      - 'true'
+      X-Consul-Lastcontact:
+      - '0'
+      X-Consul-Query-Backend:
+      - blocking-query
+      Date:
+      - Thu, 06 Jun 2024 18:19:30 GMT
+      Content-Length:
+      - '2179'
+    body:
+      encoding: ASCII-8BIT
+      string: |
+        [
+            {
+                "Node": {
+                    "ID": "e0271afe-ff0c-d82f-8808-cbafde23b2bd",
+                    "Node": "localhost",
+                    "Address": "127.0.0.1",
+                    "Datacenter": "dc1",
+                    "TaggedAddresses": {
+                        "lan": "127.0.0.1",
+                        "lan_ipv4": "127.0.0.1",
+                        "wan": "127.0.0.1",
+                        "wan_ipv4": "127.0.0.1"
+                    },
+                    "Meta": {
+                        "consul-network-segment": "",
+                        "consul-version": "1.16.4"
+                    },
+                    "CreateIndex": 13,
+                    "ModifyIndex": 14
+                },
+                "Service": {
+                    "ID": "consul",
+                    "Service": "consul",
+                    "Tags": [],
+                    "Address": "",
+                    "Meta": {
+                        "grpc_port": "8502",
+                        "grpc_tls_port": "8503",
+                        "non_voter": "false",
+                        "raft_version": "3",
+                        "read_replica": "false",
+                        "serf_protocol_current": "2",
+                        "serf_protocol_max": "5",
+                        "serf_protocol_min": "1",
+                        "version": "1.16.4"
+                    },
+                    "Port": 8300,
+                    "Weights": {
+                        "Passing": 1,
+                        "Warning": 1
+                    },
+                    "EnableTagOverride": false,
+                    "Proxy": {
+                        "Mode": "",
+                        "MeshGateway": {},
+                        "Expose": {}
+                    },
+                    "Connect": {},
+                    "PeerName": "",
+                    "CreateIndex": 13,
+                    "ModifyIndex": 13
+                },
+                "Checks": [
+                    {
+                        "Node": "localhost",
+                        "CheckID": "serfHealth",
+                        "Name": "Serf Health Status",
+                        "Status": "passing",
+                        "Notes": "",
+                        "Output": "Agent alive and reachable",
+                        "ServiceID": "",
+                        "ServiceName": "",
+                        "ServiceTags": [],
+                        "Type": "",
+                        "Interval": "",
+                        "Timeout": "",
+                        "ExposedPort": 0,
+                        "Definition": {},
+                        "CreateIndex": 13,
+                        "ModifyIndex": 13
+                    }
+                ]
+            }
+        ]
+  recorded_at: Thu, 06 Jun 2024 18:19:30 GMT
+recorded_with: VCR 6.2.0
diff --git a/spec/cassettes/Consulkit_Client_Health/health_list_service_instances/passes_query_params.yml b/spec/cassettes/Consulkit_Client_Health/health_list_service_instances/passes_query_params.yml
new file mode 100644
index 0000000..5f959ae
--- /dev/null
+++ b/spec/cassettes/Consulkit_Client_Health/health_list_service_instances/passes_query_params.yml
@@ -0,0 +1,161 @@
+---
+http_interactions:
+- request:
+    method: get
+    uri: http://localhost:8500/v1/health/service/consul?filter=Checks.Status%20==%20%22passing%22
+    body:
+      encoding: US-ASCII
+      string: ''
+    headers:
+      User-Agent:
+      - Faraday v2.9.0
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+      Accept:
+      - "*/*"
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json
+      Vary:
+      - Accept-Encoding
+      X-Consul-Default-Acl-Policy:
+      - allow
+      X-Consul-Effective-Consistency:
+      - leader
+      X-Consul-Index:
+      - '14'
+      X-Consul-Knownleader:
+      - 'true'
+      X-Consul-Lastcontact:
+      - '0'
+      X-Consul-Query-Backend:
+      - blocking-query
+      Date:
+      - Thu, 06 Jun 2024 18:19:30 GMT
+      Content-Length:
+      - '2179'
+    body:
+      encoding: ASCII-8BIT
+      string: |
+        [
+            {
+                "Node": {
+                    "ID": "e0271afe-ff0c-d82f-8808-cbafde23b2bd",
+                    "Node": "localhost",
+                    "Address": "127.0.0.1",
+                    "Datacenter": "dc1",
+                    "TaggedAddresses": {
+                        "lan": "127.0.0.1",
+                        "lan_ipv4": "127.0.0.1",
+                        "wan": "127.0.0.1",
+                        "wan_ipv4": "127.0.0.1"
+                    },
+                    "Meta": {
+                        "consul-network-segment": "",
+                        "consul-version": "1.16.4"
+                    },
+                    "CreateIndex": 13,
+                    "ModifyIndex": 14
+                },
+                "Service": {
+                    "ID": "consul",
+                    "Service": "consul",
+                    "Tags": [],
+                    "Address": "",
+                    "Meta": {
+                        "grpc_port": "8502",
+                        "grpc_tls_port": "8503",
+                        "non_voter": "false",
+                        "raft_version": "3",
+                        "read_replica": "false",
+                        "serf_protocol_current": "2",
+                        "serf_protocol_max": "5",
+                        "serf_protocol_min": "1",
+                        "version": "1.16.4"
+                    },
+                    "Port": 8300,
+                    "Weights": {
+                        "Passing": 1,
+                        "Warning": 1
+                    },
+                    "EnableTagOverride": false,
+                    "Proxy": {
+                        "Mode": "",
+                        "MeshGateway": {},
+                        "Expose": {}
+                    },
+                    "Connect": {},
+                    "PeerName": "",
+                    "CreateIndex": 13,
+                    "ModifyIndex": 13
+                },
+                "Checks": [
+                    {
+                        "Node": "localhost",
+                        "CheckID": "serfHealth",
+                        "Name": "Serf Health Status",
+                        "Status": "passing",
+                        "Notes": "",
+                        "Output": "Agent alive and reachable",
+                        "ServiceID": "",
+                        "ServiceName": "",
+                        "ServiceTags": [],
+                        "Type": "",
+                        "Interval": "",
+                        "Timeout": "",
+                        "ExposedPort": 0,
+                        "Definition": {},
+                        "CreateIndex": 13,
+                        "ModifyIndex": 13
+                    }
+                ]
+            }
+        ]
+  recorded_at: Thu, 06 Jun 2024 18:19:30 GMT
+- request:
+    method: get
+    uri: http://localhost:8500/v1/health/service/consul?filter=Checks.Status%20!=%20%22passing%22
+    body:
+      encoding: US-ASCII
+      string: ''
+    headers:
+      User-Agent:
+      - Faraday v2.9.0
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+      Accept:
+      - "*/*"
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json
+      Vary:
+      - Accept-Encoding
+      X-Consul-Default-Acl-Policy:
+      - allow
+      X-Consul-Effective-Consistency:
+      - leader
+      X-Consul-Index:
+      - '14'
+      X-Consul-Knownleader:
+      - 'true'
+      X-Consul-Lastcontact:
+      - '0'
+      X-Consul-Query-Backend:
+      - blocking-query
+      Date:
+      - Thu, 06 Jun 2024 18:19:30 GMT
+      Content-Length:
+      - '3'
+    body:
+      encoding: UTF-8
+      string: "[]\n"
+  recorded_at: Thu, 06 Jun 2024 18:19:30 GMT
+recorded_with: VCR 6.2.0
diff --git a/spec/consulkit/client/health_spec.rb b/spec/consulkit/client/health_spec.rb
new file mode 100644
index 0000000..32a502a
--- /dev/null
+++ b/spec/consulkit/client/health_spec.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+describe Consulkit::Client::Health, :vcr do
+  before do
+    @client  = Consulkit.client
+    @service = 'consul'
+  end
+
+  describe 'health_list_service_instances' do
+    it 'lists the instances' do
+      instances = @client.health_list_service_instances(@service)
+
+      expect(instances.length).to be 1
+
+      first_instance = instances.first
+
+      expect(first_instance.dig('Node', 'Node')).to eq('localhost')
+      expect(first_instance.dig('Service', 'ID')).to eq('consul')
+      expect(first_instance.dig('Checks', 0, 'CheckID')).to eq('serfHealth')
+    end
+
+    it 'passes query params' do
+      instances = @client.health_list_service_instances(@service, filter: 'Checks.Status == "passing"')
+
+      expect(instances.length).to be 1
+
+      first_instance = instances.first
+
+      expect(first_instance.dig('Node', 'Node')).to eq('localhost')
+      expect(first_instance.dig('Service', 'ID')).to eq('consul')
+      expect(first_instance.dig('Checks', 0, 'CheckID')).to eq('serfHealth')
+
+      instances = @client.health_list_service_instances(@service, filter: 'Checks.Status != "passing"')
+
+      expect(instances.length).to be 0
+    end
+  end
+end