# entry[].resource.extension[].valueString
CMS Pub 100-02 Ch.15 §220 - Outpatient Rehabilitation Therapy (PT/OT/SLP). §220.1.1: Care of physician/NPP required. §220.1.2: Plan of care required. §220.1.3: Certification and recertification required. §230.1: Practice of Physical Therapy.

# entry[].resource.extension[].valueString
§220.2: Services must be reasonable and necessary. §220.3: Documentation requirements apply. §220.4: Functional reporting required.

# entry[].resource.code.coding[].display
Therapeutic procedure, one or more areas, each 15 minutes; therapeutic exercises

# entry[].resource.code.text
Outpatient Physical Therapy - Therapeutic Exercise

# entry[].resource.note[].text
Subcutaneous allergen immunotherapy initiated — grass pollen