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CPT 28050: Foot Joint Exploration with Soft Tissue Biopsy

CPT code 28050 represents surgical exploration of a foot joint with biopsy of soft tissue. Nationally, this code captures procedures performed to obtain diagnostic tissue samples from intra-articular structures of the foot, supporting histopathologic diagnosis and guiding further treatment. The code is used across outpatient surgical centers, hospital outpatient departments, and inpatient operating rooms.

Key payers commonly involved in coverage and reimbursement for this procedure include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of the clinical context for obtaining foot joint soft tissue biopsies, typical sites of service, and the payer landscape for this service.

This publication provides benchmarks and coding context, outlines common modifiers associated with surgical services for billing clarity, and summarizes clinical indications that generally lead to intra-articular foot biopsies. Data not available in the input is noted where applicable.

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Billing Code Overview

CPT code 28050 describes a surgical procedure in which the provider opens a joint in the foot and obtains a soft tissue biopsy. This service involves direct intra-articular access to sample soft tissue for diagnostic evaluation.

Service type: Surgical — foot joint exploration with soft tissue biopsy
Typical site of service: Ambulatory surgical center or hospital outpatient setting, or inpatient operating room depending on clinical need and patient status

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CPT 28050: Foot Joint Exploration with Soft Tissue Biopsy

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Billing Code Overview

Service type: Surgical — foot joint exploration with soft tissue biopsy
Typical site of service: Ambulatory surgical center or hospital outpatient setting, or inpatient operating room depending on clinical need and patient status

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult referred to podiatry or orthopedic foot and ankle surgery for an indeterminate soft-tissue mass or chronic painful swelling at a foot joint (commonly the metatarsophalangeal or midfoot joint). The patient often presents after failed conservative care (rest, NSAIDs, immobilization) with focal tenderness, progressive enlargement, or imaging (plain radiograph, MRI, or ultrasound) showing a soft-tissue lesion adjacent to or within a joint space. Pre-procedure workflow includes clinical evaluation, informed consent, review of imaging, and preoperative assessment for anesthesia. In the outpatient ambulatory surgical center or hospital operating room, the provider performs a surgical exposure of the affected joint, obtains a targeted biopsy of the soft tissue for histopathology and microbiology as indicated, achieves hemostasis, and closes the wound. Specimens are labeled and sent to pathology with relevant clinical history. Typical postoperative care includes dressings, weight-bearing instructions, pain control, and follow-up for pathology results and definitive treatment planning based on pathology (for example, excision or oncologic referral). Typical sites of service are outpatient ambulatory surgical centers or hospital outpatient departments; some cases occur in inpatient settings when combined with other procedures or when the patient requires inpatient care.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when reporting only the physician interpretation/professional portion of a diagnostic test associated with the procedure (rare for biopsy).
`52`	Reduced services	Use if the biopsy was attempted but substantially reduced (limited exposure or partial sampling).
`53`	Discontinued procedure	Use if the procedure was started but stopped for patient safety or other valid reasons.
`62`	Two surgeons	Use when two surgeons of different specialties operate together and both perform distinct portions of the procedure.
`66`	Surgical team	Use when a surgical team approach is employed for a complex case requiring multiple surgeons.
`78`	Return to OR for related procedure during global period	Use when a related procedure for complications is performed during the postoperative global period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated procedure is performed during the global period (note: `79` is not in the provided modifier list; do not use).
`50`	Bilateral procedure	Use when identical procedures are performed on both feet during the same operative session (modifier applies per payer rules).
`22`	Increased procedural services	Use when the work required is substantially greater than typical (extensive dissection, difficult exposure).
`53`	Discontinued for patient condition	Use if the procedure was terminated due to patient instability or other intraoperative issues.
`76`	Repeat procedure by same physician	Use when an identical procedure is repeated subsequent to the initial procedure (note: `76` is not in the provided modifier list; do not use).

Taxonomy Code	Specialty	Notes
207S00000X	Podiatric Medicine & Surgery	Podiatrists commonly perform foot joint biopsies and soft-tissue sampling.
207X00000X	Orthopedic Surgery	Foot and ankle orthopedic surgeons perform joint exposures and biopsies.
208000000X	General Surgery	General surgeons may perform when involved in multidisciplinary care or complex soft-tissue tumors.
207K00000X	Hand Surgery (includes extremity MSK specialists)	Foot/ankle surgical subspecialists who manage extremity tumors and complex reconstructions.
2086S0122X	Dermatology (Mohs & reconstructive)	Dermatologists may be involved when superficial soft-tissue lesions of the foot require biopsy and reconstruction.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`28050`	Incision and biopsy, soft tissue, foot, complicated exposure of joint (open biopsy)	Primary procedure: open joint exposure and soft-tissue biopsy of the foot.
`28060`	Excision of lesion, soft tissue of foot, subcutaneous; less than 1.5 cm	May be performed when the lesion is superficial and amenable to local excision rather than open joint biopsy.
`28100`	Excision, tumor, soft tissue of foot; subfascial or intramuscular	Performed for definitive removal of a larger or deeper soft-tissue tumor identified on biopsy.
`20610`	Arthrocentesis, aspiration and/or injection, major joint or bursa	May be performed preoperatively for diagnostic aspiration or therapeutic relief prior to planning an open biopsy.
`88305`	Surgical pathology, gross and microscopic examination, intermediate complexity	Pathology CPT typically billed by the laboratory for histologic evaluation of the biopsy specimen.

CPT 28039: Excision of Foot/Toe Soft-Tissue Mass, ≥1.5 cm

CPT-28041-FOOT-TOE-INTRINSIC-MUSCLE-MASS-EXCISION-15CM-OR-GREATER

CPT 28041: Excision of Intrinsic Foot/Toe Muscle Mass, Specimen ≥1.5 cm

CPT-28043-FOOT-TOE-SUBCUTANEOUS-MASS-EXCISION

CPT 28043: Excision of Subcutaneous Foot or Toe Mass

CPT-28045-FOOT-TOE-SOFT-TISSUE-MASS-EXCISION

CPT 28045: Excision of Foot/Toe Soft-Tissue Mass

CPT-28046-EXTENSIVE-EXCISION-FOOT-TOE-SOFT-TISSUE-TUMOR

CPT 28046: Extensive Excision of Foot/Toe Soft-Tissue Tumor

CPT-28047-EXTENSIVE-SOFT-TISSUE-TUMOR-EXCISION-FOOT-TOE-3CM-OR-MORE

CPT 28047: Extensive Soft Tissue Tumor Excision of Foot or Toe, ≥3 cm

CPT-28052-METATARSOPHALANGEAL-JOINT-SOFT-TISSUE-BIOPSY

CPT 28052: Metatarsophalangeal Joint Soft Tissue Biopsy

CPT-28054-DIGITAL-JOINT-BIOPSY-TOE-FINGER

CPT 28054: Surgical Biopsy of Toe or Finger Joint

CPT-28055-BURSAL-EXCISION-WITH-NERVE-DISSECTION-NEURECTOMY

CPT 28055: Bursal Excision with Nerve Dissection/Neurectomy

CPT-28060-PARTIAL-PLANTAR-FASCIECTOMY-PLANTAR-FASCIA-RELEASE

CPT 28060: Partial Plantar Fasciectomy for Plantar Fascia Decompression

Showing 1–10 of 45

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when reporting only the physician interpretation/professional portion of a diagnostic test associated with the procedure (rare for biopsy).
`52`	Reduced services	Use if the biopsy was attempted but substantially reduced (limited exposure or partial sampling).
`53`	Discontinued procedure	Use if the procedure was started but stopped for patient safety or other valid reasons.
`62`	Two surgeons	Use when two surgeons of different specialties operate together and both perform distinct portions of the procedure.
`66`	Surgical team	Use when a surgical team approach is employed for a complex case requiring multiple surgeons.
`78`	Return to OR for related procedure during global period	Use when a related procedure for complications is performed during the postoperative global period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated procedure is performed during the global period (note: `79` is not in the provided modifier list; do not use).
`50`	Bilateral procedure	Use when identical procedures are performed on both feet during the same operative session (modifier applies per payer rules).
`22`	Increased procedural services	Use when the work required is substantially greater than typical (extensive dissection, difficult exposure).
`53`	Discontinued for patient condition	Use if the procedure was terminated due to patient instability or other intraoperative issues.
`76`	Repeat procedure by same physician	Use when an identical procedure is repeated subsequent to the initial procedure (note: `76` is not in the provided modifier list; do not use).

Taxonomy Code	Specialty	Notes
207S00000X	Podiatric Medicine & Surgery	Podiatrists commonly perform foot joint biopsies and soft-tissue sampling.
207X00000X	Orthopedic Surgery	Foot and ankle orthopedic surgeons perform joint exposures and biopsies.
208000000X	General Surgery	General surgeons may perform when involved in multidisciplinary care or complex soft-tissue tumors.
207K00000X	Hand Surgery (includes extremity MSK specialists)	Foot/ankle surgical subspecialists who manage extremity tumors and complex reconstructions.
2086S0122X	Dermatology (Mohs & reconstructive)	Dermatologists may be involved when superficial soft-tissue lesions of the foot require biopsy and reconstruction.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`28050`	Incision and biopsy, soft tissue, foot, complicated exposure of joint (open biopsy)	Primary procedure: open joint exposure and soft-tissue biopsy of the foot.
`28060`	Excision of lesion, soft tissue of foot, subcutaneous; less than 1.5 cm	May be performed when the lesion is superficial and amenable to local excision rather than open joint biopsy.
`28100`	Excision, tumor, soft tissue of foot; subfascial or intramuscular	Performed for definitive removal of a larger or deeper soft-tissue tumor identified on biopsy.
`20610`	Arthrocentesis, aspiration and/or injection, major joint or bursa	May be performed preoperatively for diagnostic aspiration or therapeutic relief prior to planning an open biopsy.
`88305`	Surgical pathology, gross and microscopic examination, intermediate complexity	Pathology CPT typically billed by the laboratory for histologic evaluation of the biopsy specimen.

CPT 28039: Excision of Foot/Toe Soft-Tissue Mass, ≥1.5 cm

CPT-28041-FOOT-TOE-INTRINSIC-MUSCLE-MASS-EXCISION-15CM-OR-GREATER

CPT 28041: Excision of Intrinsic Foot/Toe Muscle Mass, Specimen ≥1.5 cm

CPT-28043-FOOT-TOE-SUBCUTANEOUS-MASS-EXCISION

CPT 28043: Excision of Subcutaneous Foot or Toe Mass

CPT-28045-FOOT-TOE-SOFT-TISSUE-MASS-EXCISION

CPT 28045: Excision of Foot/Toe Soft-Tissue Mass

CPT-28046-EXTENSIVE-EXCISION-FOOT-TOE-SOFT-TISSUE-TUMOR

CPT 28046: Extensive Excision of Foot/Toe Soft-Tissue Tumor

CPT-28047-EXTENSIVE-SOFT-TISSUE-TUMOR-EXCISION-FOOT-TOE-3CM-OR-MORE

CPT 28047: Extensive Soft Tissue Tumor Excision of Foot or Toe, ≥3 cm

CPT-28052-METATARSOPHALANGEAL-JOINT-SOFT-TISSUE-BIOPSY

CPT 28052: Metatarsophalangeal Joint Soft Tissue Biopsy

CPT-28054-DIGITAL-JOINT-BIOPSY-TOE-FINGER

CPT 28054: Surgical Biopsy of Toe or Finger Joint

CPT-28055-BURSAL-EXCISION-WITH-NERVE-DISSECTION-NEURECTOMY

CPT 28055: Bursal Excision with Nerve Dissection/Neurectomy

CPT-28060-PARTIAL-PLANTAR-FASCIECTOMY-PLANTAR-FASCIA-RELEASE

CPT 28060: Partial Plantar Fasciectomy for Plantar Fascia Decompression

Showing 1–10 of 45

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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CPT 28050: Foot Joint Exploration with Soft Tissue Biopsy

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Billing Code Overview

OpenPayer

CPT 28050: Foot Joint Exploration with Soft Tissue Biopsy

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References