I87.0

Postphlebitic syndrome

Postphlebitic syndrome, also commonly referred to as post-thrombotic syndrome (PTS), is a chronic condition characterized by venous hypertension and subsequent clinical symptoms that develop as a long-term complication of deep vein thrombosis (DVT). The pathophysiology involves the destruction of venous valves (valvular incompetence) and persistent venous obstruction caused by a non-resolved thrombus. This leads to impaired venous return from the extremities, usually the legs, resulting in elevated pressure within the deep and superficial venous systems. Over time, this chronic hypertension causes microvascular changes, increased capillary permeability, and tissue hypoxia, leading to the progressive skin and soft tissue changes characteristic of advanced venous disease. It is estimated to affect 20% to 50% of patients following an episode of DVT, significantly impacting quality of life.

Clinical Symptoms

Chronic edema (swelling) of the affected limb
Intractable aching or 'heaviness' in the leg
Cramping sensations (especially after standing or walking)
Pruritus (intense itching) of the skin
Paresthesia (tingling or 'pins and needles' sensations)
Venous claudication (pain triggered by exercise that resolves with rest and elevation)
Hemosiderin staining (brownish-red skin discoloration)
Venous eczema or stasis dermatitis
Lipodermatosclerosis (thickening and hardening of the skin and subcutaneous fat)
Venous stasis ulcers (chronic, poorly healing wounds typically near the medial malleolus)
Atrophie blanche (white, scar-like patches on the skin)
Visible telangiectasias or secondary varicose veins

Common Causes

Prior Deep Vein Thrombosis (DVT) - the primary etiology
Irreversible damage to venous valves during the inflammatory response to a thrombus
Incomplete recanalization of the vein following a thrombotic event
Recurrent ipsilateral deep vein thrombosis
Suboptimal or delayed anticoagulation therapy following an acute DVT
Persistent proximal venous obstruction
Elevated body mass index (BMI) or obesity
Advanced age
Varicose veins prior to the DVT event
Poor compliance with compression therapy following DVT diagnosis

Documentation & Coding Tips

Explicitly document the presence and exact location of any associated venous ulcers.

Example: Patient presents with postphlebitic syndrome of the right lower extremity. Physical exam reveals a 2cm by 2cm shallow ulceration on the right medial malleolus with irregular borders and granulation tissue. Diagnosis: Postphlebitic syndrome with ulcer of right lower extremity (I87.011). Plan: Wound debridement and multi-layer compression therapy.

Billing Focus: Laterality and specific location of the ulcer must be documented to support codes such as I87.011.

Identify the specific complication such as inflammation or pain for accurate sub-classification.

Example: History of deep vein thrombosis in the left leg three years ago. Patient now reports chronic heaviness and burning pain in the left calf. Examination shows 2 plus pitting edema and hyperpigmentation. Diagnosis: Postphlebitic syndrome with pain of left lower extremity (I87.032).

Billing Focus: Documentation must differentiate between pain, inflammation, or both to select the correct 5th or 6th character.

Clarify the laterality of the condition in every encounter note.

Example: Established patient with bilateral postphlebitic syndrome. Right leg shows stasis dermatitis and chronic edema; left leg shows active inflammation without ulceration. Diagnosis: Postphlebitic syndrome with inflammation of bilateral lower extremities (I87.023).

Billing Focus: Bilateral status codes (ending in 3) should be used when both legs are affected rather than listing two separate codes.

Link the current condition to a prior history of deep vein thrombosis.

Example: Evaluation of chronic venous insufficiency symptoms. Patient has a documented history of femoral-popliteal DVT in 2018. Current presentation of left leg swelling and skin induration is consistent with postphlebitic syndrome. Diagnosis: Postphlebitic syndrome of left lower extremity (I87.002).

Billing Focus: Establishing the post-thrombotic etiology distinguishes this from primary varicose veins or simple venous insufficiency.

Describe skin changes such as stasis dermatitis or lipodermatosclerosis to support clinical severity.

Example: Patient with postphlebitic syndrome presents with significant lipodermatosclerosis and hemosiderin staining of the right lower leg. No current ulceration noted, but skin is taut and brawny. Diagnosis: Postphlebitic syndrome with inflammation of right lower extremity (I87.021).

Billing Focus: Clinical manifestations like inflammation (I87.02-) must be documented to move beyond the non-specific I87.00- code.

Relevant CPT Codes

93970 - Duplex scan of extremity veins including responses to compression and other maneuvers; complete bilateral study
Used to evaluate venous reflux and confirm the extent of post-thrombotic damage.
99214 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a medically appropriate history and/or examination and moderate level of medical decision making. When using time for code selection, 30-39 minutes of total time is spent on the date of the encounter.
Postphlebitic syndrome management often involves multiple treatment modalities and history review.
99213 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a medically appropriate history and/or examination and low level of medical decision making. When using time for code selection, 20-29 minutes of total time is spent on the date of the encounter.
Appropriate for routine monitoring of compression compliance and skin health.
29581 - Application of multi-layer compression system; leg (below knee), including ankle and foot
Primary treatment for managing edema and healing ulcers in postphlebitic patients.
11042 - Debridement, subcutaneous tissue; first 20 sq cm or less
Required for patients with postphlebitic syndrome who develop necrotic ulcers.
36475 - Endovenous ablation therapy of incompetent vein, extremity, inclusive of all imaging guidance and monitoring, percutaneous, radiofrequency; first vein treated
Though primarily for varicose veins, it is sometimes used in post-thrombotic cases with superficial reflux.
99204 - Office or other outpatient visit for the evaluation and management of a new patient, which requires a medically appropriate history and/or examination and moderate level of medical decision making. When using time for code selection, 45-59 minutes of total time is spent on the date of the encounter.
Required for a thorough initial evaluation of a patient with suspected post-thrombotic disease.
93971 - Duplex scan of extremity veins including responses to compression and other maneuvers; unilateral or limited study
Used for targeted follow-up of a known post-thrombotic site in one leg.
97597 - Debridement (e.g., high pressure waterjet with/without suction, sharp selective debridement with open wound)
Used for managing the fibrinous slough often found in postphlebitic ulcers.
99203 - Office or other outpatient visit for the evaluation and management of a new patient, which requires a medically appropriate history and/or examination and low level of medical decision making. When using time for code selection, 30-44 minutes of total time is spent on the date of the encounter.
Initial visit for a patient presenting with classic, uncomplicated post-thrombotic symptoms.