diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8a7034f..8934385 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -15,3 +15,11 @@ as well as set up an auto-formatter commit hook.
 - Don't depend on `core__` tables.
   - Allows folks to build this study even if they can't or haven't built `core`
   - Allows `core` to smooth over data oddities we might be interested in
+
+- For non-CUBE tables (like quality `q_` metric summaries or `c_resources_per_pt`),
+  always try to have a `cumulus__all` row for the second grouping column,
+  as well as the normal row -- which can hold the group value,
+  be NULL if no grouping exists, or maybe `cumulus__none` if the row
+  represents all resources without a group value.
+  This way, downstream visualizers can reliably roll-up detailed views into
+  more abstract views.
diff --git a/cumulus_library_data_metrics/base.py b/cumulus_library_data_metrics/base.py
index 9f703a0..4cb590c 100644
--- a/cumulus_library_data_metrics/base.py
+++ b/cumulus_library_data_metrics/base.py
@@ -19,6 +19,11 @@ def __init__(self):
         super().__init__()
         self.display_text = f"Creating {self.name} tables…"
         self.summary_entries = {}
+        # A "group" is a value in the second column - a secondary characteristic like "field"
+        # (group examples: "code", "valueCodeableConcept") or a stratifier like "profile"
+        # (group examples: "Lab", "Note"). These will "roll-up" to the resource level in the
+        # summary with a "cumulus__all" group entry row.
+        self.summary_groups = {}
         self.queries = []
         self.schemas = {}
 
@@ -26,32 +31,34 @@ def __init__(self):
         # some of them are not present (notably DocRef.context.period.start).
         self.date_fields = copy.deepcopy(resource_info.DATES)
 
-    def make_table_fragment(self, src: str, stratifier: str | None = None):
+    def make_table_fragment(self, src: str, group: str | None = None):
         key = src.lower()
-        if stratifier:
-            key += f"_{stratifier.lower().replace(' ', '_')}"
+        if group:
+            key += f"_{group.lower().replace(' ', '_')}"
         return key
 
     def add_summary_entry(
-        self, src: str, stratifier: str | None = None, *, denominator: str | None = None
+        self, src: str, group: str | None = None, *, denominator: str | None = None
     ) -> None:
         # These are all flags for the summary-table-builder jinja.
-        key = self.make_table_fragment(src, stratifier)
+        key = self.make_table_fragment(src, group)
         self.summary_entries[key] = {
             "src": src,
-            "stratifier": stratifier,
+            "group": group,
             "denominator": denominator,
         }
+        self.summary_groups.setdefault(src, set()).add(group)
 
-    def make_summary(self, stratifier_column: str | None = None) -> None:
+    def make_summary(self, group_column: str | None = None) -> None:
         """Makes a summary table, from all the individual metric tables"""
         # Always define *something* even if we don't use it, so that consuming visualizations
-        # can assume a consistent two-column definition of resource + stratifier.
-        stratifier_column = stratifier_column or "stratifier"
+        # can assume a consistent two-column definition of resource + group.
+        group_column = group_column or "subgroup"
         sql = self.render_sql(
             "../base.summary",
             entries=self.summary_entries,
-            stratifier_column=stratifier_column,
+            group_column=group_column,
+            group_values=self.summary_groups,
             metric=self.name,
         )
         self.queries.append(sql)
diff --git a/cumulus_library_data_metrics/base.summary.jinja b/cumulus_library_data_metrics/base.summary.jinja
index ee360c3..691e7f7 100644
--- a/cumulus_library_data_metrics/base.summary.jinja
+++ b/cumulus_library_data_metrics/base.summary.jinja
@@ -2,28 +2,74 @@ CREATE TABLE data_metrics__{{ metric }}_summary AS (
     WITH
     {%- for entry_key, summary_info in entries.items() %}
     {{ entry_key }}_numerator AS (
-        SELECT '{{ entry_key }}' AS entry_key, COUNT(id) AS numerator
+        SELECT COUNT(id) AS numerator
         FROM data_metrics__{{ metric }}_{{ entry_key }}
     ),
     {{ entry_key }}_denominator AS (
-        {% if summary_info["denominator"] and summary_info["denominator"].strip() %}
+        {% if summary_info["denominator"] %}
         WITH denominator_slice AS {{ summary_info["denominator"] }}
         {% else %}
         WITH denominator_slice AS (SELECT id from {{ summary_info["src"] }})
         {% endif %}
-        SELECT '{{ entry_key }}' AS entry_key, COUNT(id) AS denominator
+        SELECT COUNT(id) AS denominator
         FROM denominator_slice
     ),
     {%- endfor %}
 
+    -- Prepare roll-up "all resources" entries by unifying numerators and grabbing distinct IDs
+    {% for resource, groups in group_values.items() %}
+    {% set all_entry_key = resource.lower() + "_all" %}
+
+    {{ all_entry_key }}_numerator_ids AS (
+        {% for group_entry_key, summary_info in entries.items() %}
+        {% if summary_info["src"] == resource %}
+        SELECT id FROM data_metrics__{{ metric }}_{{ group_entry_key }}
+        UNION
+        {% endif %}
+        {% endfor %}
+        SELECT id FROM {{ resource }} WHERE 1=0  -- empty table to finish loop
+    ),
+    {{ all_entry_key }}_numerator AS (
+        SELECT COUNT(DISTINCT id) AS numerator FROM {{ all_entry_key }}_numerator_ids
+    ),
+
+    -- And now the denominators
+    {% set has_custom_denominator = false %}
+    {% for entry_key, summary_info in entries.items() %}
+        {% if summary_info["src"] == resource and summary_info["denominator"] %}
+            {% set has_custom_denominator = true %}
+        {% endif %}
+    {% endfor %}
+    {% if has_custom_denominator %}
+    {{ all_entry_key }}_denominator_ids AS (
+        {% for group_entry_key, summary_info in entries.items() %}
+        {% if summary_info["src"] == resource %}
+        SELECT id FROM {{ summary_info["denominator"] }}
+        UNION
+        {% endif %}
+        {% endfor %}
+        SELECT id FROM {{ resource }} WHERE 1=0  -- empty table to finish loop
+    ),
+    {{ all_entry_key }}_denominator AS (
+        SELECT COUNT(DISTINCT id) AS denominator FROM {{ all_entry_key }}_denominator_ids
+    ),
+    {% else %}
+    {{ all_entry_key }}_denominator AS (
+        SELECT COUNT(id) AS denominator FROM {{ resource }}
+    ),
+    {% endif %}
+
+    {% set _ = entries.update({all_entry_key: {"src": resource, "group": "cumulus__all"} }) %}
+    {% endfor %}
+
     union_table AS (
         {%- for entry_key, summary_info in entries.items() %}
         SELECT
             '{{ summary_info["src"] }}' AS resource,
-            {% if summary_info["stratifier"] %}
-            '{{ summary_info["stratifier"] }}' AS {{ stratifier_column }},
+            {% if summary_info["group"] %}
+            '{{ summary_info["group"] }}' AS {{ group_column }},
             {% else %}
-            CAST(NULL AS VARCHAR) AS {{ stratifier_column }},
+            CAST(NULL AS VARCHAR) AS {{ group_column }},
             {% endif %}
             numerator,
             denominator,
@@ -35,8 +81,7 @@ CREATE TABLE data_metrics__{{ metric }}_summary AS (
                 END
             AS DECIMAL(5, 2)) AS percentage
         FROM {{ entry_key }}_numerator AS numerator_table
-        INNER JOIN {{ entry_key }}_denominator AS denominator_table
-        ON numerator_table.entry_key = denominator_table.entry_key
+        CROSS JOIN {{ entry_key }}_denominator AS denominator_table
         {%- if not loop.last %}
         UNION
         {%- endif -%}
diff --git a/cumulus_library_data_metrics/c_resources_per_pt/c_resources_per_pt.jinja b/cumulus_library_data_metrics/c_resources_per_pt/c_resources_per_pt.jinja
index 4ca3ad8..574abd1 100644
--- a/cumulus_library_data_metrics/c_resources_per_pt/c_resources_per_pt.jinja
+++ b/cumulus_library_data_metrics/c_resources_per_pt/c_resources_per_pt.jinja
@@ -72,7 +72,19 @@ SELECT
     MAX(num_resources) AS "max"
 FROM summed_counts
 UNION
+-- duplicate the above for consistency with flagging
+-- "no category available" situations via a NULL category
+SELECT
+    'cumulus__all' AS resource,
+    CAST(NULL AS VARCHAR) AS category,
+    CAST(AVG(num_resources) AS DECIMAL(18, 2)) AS average,
+    CAST(STDDEV_POP(num_resources) AS DECIMAL(18, 2)) AS std_dev,
+    MAX(num_resources) AS "max"
+FROM summed_counts
+UNION
 {%- for resource in patient_fields %}
+-- If you change this cumulus_all block, also change its
+-- duplicate block below where we use NULL as the category.
 SELECT
     '{{ resource }}' AS resource,
     'cumulus__all' AS category,
@@ -97,6 +109,22 @@ AND counts.patient = patient_refs.ref
 AND counts.category = cat_values.category
 GROUP BY cat_values.category
 HAVING MAX(num_resources) > 0
+{% else %}
+-- copy of cumulus__all above, but with a NULL category,
+-- for consistency: there's always a roll-up and a detailed row,
+-- and this is how we treat other "no categorization available"
+-- metrics like rows in q_date_recent.
+-- Note how this is different than "cumulus__none" here, because
+-- there just isn't a categorization we even look for.
+UNION
+SELECT
+    '{{ resource }}' AS resource,
+    CAST(NULL AS VARCHAR) AS category,
+    CAST(AVG(num_resources) AS DECIMAL(18, 2)) AS average,
+    CAST(STDDEV_POP(num_resources) AS DECIMAL(18, 2)) AS std_dev,
+    MAX(num_resources) AS "max"
+FROM summed_{{ resource|lower }}_counts
+WHERE resource = '{{ resource }}'
 {% endif %}
 {%- if not loop.last %}
 UNION
diff --git a/cumulus_library_data_metrics/q_ref_target_pop/q_ref_target_pop.py b/cumulus_library_data_metrics/q_ref_target_pop/q_ref_target_pop.py
index c5091cb..f093103 100644
--- a/cumulus_library_data_metrics/q_ref_target_pop/q_ref_target_pop.py
+++ b/cumulus_library_data_metrics/q_ref_target_pop/q_ref_target_pop.py
@@ -24,4 +24,4 @@ def add_metric_queries(self) -> None:
         self.make_table(src="MedicationRequest", dest="Patient", field="subject")
         self.make_table(src="Observation", dest="Patient", field="subject")
         self.make_table(src="Procedure", dest="Patient", field="subject")
-        self.make_summary(stratifier_column="target")
+        self.make_summary(group_column="target")
diff --git a/cumulus_library_data_metrics/q_ref_target_valid/q_ref_target_valid.py b/cumulus_library_data_metrics/q_ref_target_valid/q_ref_target_valid.py
index f99cfd0..440c24e 100644
--- a/cumulus_library_data_metrics/q_ref_target_valid/q_ref_target_valid.py
+++ b/cumulus_library_data_metrics/q_ref_target_valid/q_ref_target_valid.py
@@ -47,4 +47,4 @@ def add_metric_queries(self) -> None:
         self.make_table(src="Observation", dest="Encounter", field="encounter")
         self.make_table(src="Procedure", dest="Patient", field="subject")
         self.make_table(src="Procedure", dest="Encounter", field="encounter")
-        self.make_summary(stratifier_column="target")
+        self.make_summary(group_column="target")
diff --git a/cumulus_library_data_metrics/q_system_use/q_system_use.py b/cumulus_library_data_metrics/q_system_use/q_system_use.py
index cd10b3c..391119b 100644
--- a/cumulus_library_data_metrics/q_system_use/q_system_use.py
+++ b/cumulus_library_data_metrics/q_system_use/q_system_use.py
@@ -73,4 +73,4 @@ def add_metric_queries(self) -> None:
                 "http://www.cms.gov/Medicare/Coding/ICD10",
             ],
         )
-        self.make_summary(stratifier_column="field")
+        self.make_summary(group_column="field")
diff --git a/cumulus_library_data_metrics/q_valid_us_core_v4/q_valid_us_core_v4.py b/cumulus_library_data_metrics/q_valid_us_core_v4/q_valid_us_core_v4.py
index 8f79b71..1a5d51b 100644
--- a/cumulus_library_data_metrics/q_valid_us_core_v4/q_valid_us_core_v4.py
+++ b/cumulus_library_data_metrics/q_valid_us_core_v4/q_valid_us_core_v4.py
@@ -19,4 +19,4 @@ def make_table(self, **kwargs) -> None:
 
     def add_metric_queries(self) -> None:
         super().add_metric_queries()
-        self.make_summary(stratifier_column="profile")
+        self.make_summary(group_column="profile")
diff --git a/tests/data/c_resources_per_pt/general/expected_summary.csv b/tests/data/c_resources_per_pt/general/expected_summary.csv
index 80d3359..f561cb4 100644
--- a/tests/data/c_resources_per_pt/general/expected_summary.csv
+++ b/tests/data/c_resources_per_pt/general/expected_summary.csv
@@ -1,6 +1,9 @@
 resource,category,average,std_dev,max
+cumulus__all,,3.00,0.82,4
 cumulus__all,cumulus__all,3.00,0.82,4
+ServiceRequest,,0.00,0.00,0
 ServiceRequest,cumulus__all,0.00,0.00,0
+Procedure,,0.00,0.00,0
 Procedure,cumulus__all,0.00,0.00,0
 Observation,cumulus__all,0.00,0.00,0
 MedicationRequest,outpatient,1.33,0.47,2
@@ -8,10 +11,12 @@ MedicationRequest,inpatient,0.33,0.47,1
 MedicationRequest,discharge; inpatient,0.33,0.47,1
 MedicationRequest,cumulus__none,0.33,0.47,1
 MedicationRequest,cumulus__all,2.33,1.25,4
+Immunization,,0.00,0.00,0
 Immunization,cumulus__all,0.00,0.00,0
 Encounter,cumulus__all,0.00,0.00,0
 DocumentReference,cumulus__all,0.00,0.00,0
 DiagnosticReport,cumulus__all,0.00,0.00,0
+Device,,0.00,0.00,0
 Device,cumulus__all,0.00,0.00,0
 Condition,cumulus__none,0.67,0.47,1
 Condition,cumulus__all,0.67,0.47,1
diff --git a/tests/data/q_date_recent/general/expected_summary.csv b/tests/data/q_date_recent/general/expected_summary.csv
index 3d59982..567826c 100644
--- a/tests/data/q_date_recent/general/expected_summary.csv
+++ b/tests/data/q_date_recent/general/expected_summary.csv
@@ -1,10 +1,19 @@
-resource,stratifier,numerator,denominator,percentage
+resource,subgroup,numerator,denominator,percentage
 Procedure,,2,5,40.00
+Procedure,cumulus__all,2,5,40.00
 Observation,,0,0,0.00
+Observation,cumulus__all,0,0,0.00
 MedicationRequest,,0,0,0.00
+MedicationRequest,cumulus__all,0,0,0.00
 Immunization,,0,0,0.00
+Immunization,cumulus__all,0,0,0.00
 Encounter,,1,4,25.00
+Encounter,cumulus__all,1,4,25.00
 DocumentReference,,0,0,0.00
+DocumentReference,cumulus__all,0,0,0.00
 DiagnosticReport,,0,0,0.00
+DiagnosticReport,cumulus__all,0,0,0.00
 Condition,,2,4,50.00
+Condition,cumulus__all,2,4,50.00
 AllergyIntolerance,,0,0,0.00
+AllergyIntolerance,cumulus__all,0,0,0.00
diff --git a/tests/data/q_ref_target_pop/general/expected_summary.csv b/tests/data/q_ref_target_pop/general/expected_summary.csv
index 3ac98db..385529f 100644
--- a/tests/data/q_ref_target_pop/general/expected_summary.csv
+++ b/tests/data/q_ref_target_pop/general/expected_summary.csv
@@ -1,13 +1,23 @@
 resource,target,numerator,denominator,percentage
 # Various edge cases here in procedure
+Procedure,cumulus__all,1,4,25.00
 Procedure,Patient,1,4,25.00
 # Rest are just short happy-path checks to confirm that we look at the right json field
+Observation,cumulus__all,0,1,0.00
 Observation,Patient,0,1,0.00
+MedicationRequest,cumulus__all,0,1,0.00
 MedicationRequest,Patient,0,1,0.00
+Immunization,cumulus__all,0,1,0.00
 Immunization,Patient,0,1,0.00
+Encounter,cumulus__all,0,1,0.00
 Encounter,Patient,0,1,0.00
+DocumentReference,cumulus__all,0,1,0.00
 DocumentReference,Patient,0,1,0.00
+DiagnosticReport,cumulus__all,0,1,0.00
 DiagnosticReport,Patient,0,1,0.00
+Device,cumulus__all,0,1,0.00
 Device,Patient,0,1,0.00
+Condition,cumulus__all,0,1,0.00
 Condition,Patient,0,1,0.00
+AllergyIntolerance,cumulus__all,0,1,0.00
 AllergyIntolerance,Patient,0,1,0.00
diff --git a/tests/data/q_ref_target_valid/general/expected_procedure_encounter.csv b/tests/data/q_ref_target_valid/general/expected_procedure_encounter.csv
index 01ec6d9..ce5d781 100644
--- a/tests/data/q_ref_target_valid/general/expected_procedure_encounter.csv
+++ b/tests/data/q_ref_target_valid/general/expected_procedure_encounter.csv
@@ -1,2 +1,3 @@
 id,status,target
 bad-encounter,,Encounter/Nope
+bad-both,,Encounter/Nope
diff --git a/tests/data/q_ref_target_valid/general/expected_summary.csv b/tests/data/q_ref_target_valid/general/expected_summary.csv
index 89c70fb..1b79417 100644
--- a/tests/data/q_ref_target_valid/general/expected_summary.csv
+++ b/tests/data/q_ref_target_valid/general/expected_summary.csv
@@ -1,22 +1,32 @@
 resource,target,numerator,denominator,percentage
 # Various edge cases here in procedure
-Procedure,Patient,1,9,11.11
-Procedure,Encounter,1,9,11.11
+Procedure,cumulus__all,3,10,30.00
+Procedure,Patient,2,10,20.00
+Procedure,Encounter,2,10,20.00
 # Rest are just short happy-path checks to confirm that we look at the right json field
+Observation,cumulus__all,0,1,0.00
 Observation,Patient,0,1,0.00
 Observation,Encounter,0,1,0.00
+MedicationRequest,cumulus__all,0,1,0.00
 MedicationRequest,Patient,0,1,0.00
 MedicationRequest,Encounter,0,1,0.00
+Immunization,cumulus__all,0,1,0.00
 Immunization,Patient,0,1,0.00
 Immunization,Encounter,0,1,0.00
+Encounter,cumulus__all,0,1,0.00
 Encounter,Patient,0,1,0.00
 # Except DocRefs also have some extra cases around encounter array support
+DocumentReference,cumulus__all,3,6,50.00
 DocumentReference,Patient,0,6,0.00
 DocumentReference,Encounter,3,6,50.00
+DiagnosticReport,cumulus__all,0,1,0.00
 DiagnosticReport,Patient,0,1,0.00
 DiagnosticReport,Encounter,0,1,0.00
+Device,cumulus__all,0,1,0.00
 Device,Patient,0,1,0.00
+Condition,cumulus__all,0,1,0.00
 Condition,Patient,0,1,0.00
 Condition,Encounter,0,1,0.00
+AllergyIntolerance,cumulus__all,0,1,0.00
 AllergyIntolerance,Patient,0,1,0.00
 AllergyIntolerance,Encounter,0,1,0.00
diff --git a/tests/data/q_ref_target_valid/general/procedure/0.ndjson b/tests/data/q_ref_target_valid/general/procedure/0.ndjson
index 9ea8ad5..2bc93c6 100644
--- a/tests/data/q_ref_target_valid/general/procedure/0.ndjson
+++ b/tests/data/q_ref_target_valid/general/procedure/0.ndjson
@@ -1,6 +1,7 @@
 {"resourceType": "Procedure", "id": "valid", "subject": {"reference": "Patient/A"}, "encounter": {"reference": "Encounter/A"}}
 {"resourceType": "Procedure", "id": "bad-patient", "subject": {"reference": "Patient/Nope"}, "encounter": {"reference": "Encounter/A"}}
 {"resourceType": "Procedure", "id": "bad-encounter", "subject": {"reference": "Patient/A"}, "encounter": {"reference": "Encounter/Nope"}}
+{"resourceType": "Procedure", "id": "bad-both", "subject": {"reference": "Patient/Nope"}, "encounter": {"reference": "Encounter/Nope"}}
 {"resourceType": "Procedure", "id": "non-patient", "subject": {"reference": "Device/A"}, "encounter": {"reference": "Encounter/A"}}
 {"resourceType": "Procedure", "id": "non-encounter", "subject": {"reference": "Patient/A"}, "encounter": {"reference": "Device/A"}}
 {"resourceType": "Procedure", "id": "missing-patient-ref", "subject": {"display": "Patient A"}, "encounter": {"reference": "Encounter/A"}}
diff --git a/tests/data/q_system_use/general/expected_summary.csv b/tests/data/q_system_use/general/expected_summary.csv
index 6ac73f5..b230bf9 100644
--- a/tests/data/q_system_use/general/expected_summary.csv
+++ b/tests/data/q_system_use/general/expected_summary.csv
@@ -1,14 +1,24 @@
 resource,field,numerator,denominator,percentage
 # Various edge cases here in procedure
+Procedure,cumulus__all,4,12,33.33
 Procedure,code,4,12,33.33
 # Rest are often short happy-path checks to confirm that we look at the right json field
 Observation,valueCodeableConcept,0,2,0.00
+Observation,cumulus__all,0,2,0.00
 Observation,code,0,2,0.00
 MedicationRequest,medicationCodeableConcept,0,1,0.00
+MedicationRequest,cumulus__all,0,1,0.00
+Medication,cumulus__all,0,1,0.00
 Medication,code,0,1,0.00
 Immunization,vaccineCode,0,1,0.00
+Immunization,cumulus__all,0,1,0.00
 DocumentReference,type,1,3,33.33
+DocumentReference,cumulus__all,1,3,33.33
+DiagnosticReport,cumulus__all,0,1,0.00
 DiagnosticReport,code,0,1,0.00
 Device,type,0,1,0.00
+Device,cumulus__all,0,1,0.00
+Condition,cumulus__all,0,1,0.00
 Condition,code,0,1,0.00
+AllergyIntolerance,cumulus__all,0,1,0.00
 AllergyIntolerance,code,0,1,0.00
diff --git a/tests/data/q_valid_us_core_v4/general/expected_summary.csv b/tests/data/q_valid_us_core_v4/general/expected_summary.csv
index c73b55b..281c1b7 100644
--- a/tests/data/q_valid_us_core_v4/general/expected_summary.csv
+++ b/tests/data/q_valid_us_core_v4/general/expected_summary.csv
@@ -1,15 +1,26 @@
 resource,profile,numerator,denominator,percentage
 Procedure,,0,0,0.00
+Procedure,cumulus__all,0,0,0.00
 Patient,,0,0,0.00
+Patient,cumulus__all,0,0,0.00
+Observation,cumulus__all,3,3,100.00
 Observation,Vital Signs,0,0,0.00
-Observation,Smoking Status,0,0,0.00
-Observation,Laboratory,0,0,0.00
+Observation,Smoking Status,2,2,100.00
+Observation,Laboratory,2,2,100.00
 MedicationRequest,,0,0,0.00
+MedicationRequest,cumulus__all,0,0,0.00
 Medication,,0,0,0.00
+Medication,cumulus__all,0,0,0.00
 Immunization,,0,0,0.00
+Immunization,cumulus__all,0,0,0.00
 Encounter,,2,3,66.67
+Encounter,cumulus__all,2,3,66.67
 DocumentReference,,0,0,0.00
+DocumentReference,cumulus__all,0,0,0.00
+DiagnosticReport,cumulus__all,0,0,0.00
 DiagnosticReport,Note,0,0,0.00
 DiagnosticReport,Lab,0,0,0.00
 Condition,,0,0,0.00
+Condition,cumulus__all,0,0,0.00
 AllergyIntolerance,,0,0,0.00
+AllergyIntolerance,cumulus__all,0,0,0.00
diff --git a/tests/data/q_valid_us_core_v4/general/observation/0.ndjson b/tests/data/q_valid_us_core_v4/general/observation/0.ndjson
new file mode 100644
index 0000000..7aaaf03
--- /dev/null
+++ b/tests/data/q_valid_us_core_v4/general/observation/0.ndjson
@@ -0,0 +1,3 @@
+{"resourceType": "Observation", "id": "lab-nothing", "category": [{"coding": [{"code": "laboratory", "system": "http://terminology.hl7.org/CodeSystem/observation-category"}]}]}
+{"resourceType": "Observation", "id": "smoking-nothing", "code": {"coding": [{"system": "http://loinc.org", "code": "72166-2"}]}}
+{"resourceType": "Observation", "id": "both-nothing", "code": {"coding": [{"system": "http://loinc.org", "code": "72166-2"}]}, "category": [{"coding": [{"code": "laboratory", "system": "http://terminology.hl7.org/CodeSystem/observation-category"}]}]}