granulomatous

DEFINITION of granulomatous

Granulomatous inflammation is a distinctive form of chronic inflammation characterized by the formation of granulomas, which are focal aggregates of activated macrophages (epithelioid histiocytes), often surrounded by lymphocytes, plasma cells, fibroblasts, and sometimes multinucleated giant cells. This represents the immune system’s attempt to wall off and contain substances it perceives as foreign but cannot eliminate.

Types of Granulomas: -Caseating: Central necrosis (cheese-like appearance); classic for tuberculosis and fungal infections. -Non-Caseating: No central necrosis; seen in sarcoidosis, Crohn’s disease, and foreign body reactions. -Foreign Body: Reaction to exogenous material (sutures, splinters, silicone). -Immune-Mediated: Result of hypersensitivity reactions (sarcoidosis, granulomatosis with polyangiitis).

Common Granulomatous Diseases: -Infectious: Tuberculosis, leprosy, histoplasmosis, coccidioidomycosis, syphilis. -Autoimmune/Inflammatory: sarcoidosis, Crohn’s disease, granulomatosis with polyangiitis (GPA). -Occupational: Berylliosis, silicosis, asbestosis. -Drug-Induced: Certain medications can trigger granulomatous reactions. -Clinical Significance: The presence of granulomatous inflammation helps narrow differential diagnoses but is not pathognomonic for any single disease. Further testing (cultures, stains, serology, clinical correlation) is required to determine the underlying etiology.

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ETYMOLOGY of granulomatous

latin greek Derived from multiple roots: Granulo: From Latin granulum, meaning “small grain” (diminutive of granum = grain), referring to the grain-like appearance of the lesions. -oma: Greek suffix meaning “tumor” or “mass.” -ous: Latin/Greek suffix meaning “pertaining to” or “characterized by.” Literally translates to “pertaining to a small grain-like mass.” The term was first used in pathology in the late 19th century to describe the characteristic appearance of tuberculous lesions.

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RELATED TERMS

• Granuloma: The actual lesion/nodule itself.
• Macrophage/Histiocyte: The primary cell type forming granulomas.
• Giant Cell: Multinucleated cells formed by fusion of macrophages (Langhans, foreign body, Touton types).
• Caseous Necrosis: Cheese-like tissue death characteristic of tuberculous granulomas.
• sarcoidosis: Systemic disease characterized by non-caseating granulomas.
• Crohn’s Disease: Inflammatory bowel disease with granulomatous inflammation.
• Granulomatosis with Polyangiitis (GPA): Formerly Wegener’s; vasculitis with granulomas.
• Chronic Granulomatous Disease (CGD): Genetic immunodeficiency where phagocytes cannot kill certain bacteria/fungi.
• Pyogenic Granuloma: Misnomer; actually a lobular capillary hemangioma, not a true granuloma.
• Granuloma Annulare: Benign skin condition with annular granulomatous lesions.
• Interferon-Gamma: Cytokine critical for granuloma formation.
• ACE Level: Angiotensin-converting enzyme; often elevated in sarcoidosis.
• PPD/IGRA: Tests for tuberculosis (caseating granulomas).
• ANCA: Antibody associated with granulomatosis with polyangiitis.

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CODING AND NUANCES

ICD-10-CM Codes Note: “Granulomatous” is a descriptive term, not a standalone diagnosis. ICD-10 codes depend on the specific disease and organ system involved. Below are common granulomatous condition codes.

Sarcoidosis (Systemic Granulomatous Disease)

• D86.0: Sarcoidosis of lung
• D86.1: Sarcoidosis of lymph nodes
• D86.2: Sarcoidosis of lung with sarcoidosis of lymph nodes
• D86.3: Sarcoidosis of skin
• D86.8: Sarcoidosis of other sites
• D86.81: Sarcoid meningitis
• D86.82: Sarcoid myocarditis
• D86.83: Sarcoid tubulointerstitial nephritis
• D86.84: Sarcoid arthropathy
• D86.85: Sarcoid hepatitis
• D86.86: Sarcoid iridocyclitis
• D86.87: Sarcoid uveitis
• D86.89: Sarcoidosis of other specified sites
• D86.9: Sarcoidosis, unspecified

Tuberculosis (Caseating Granulomas)

• A15.0: Tuberculosis of lung, confirmed by microscopic examination
• A15.1: Tuberculosis of lung, confirmed by culture only
• A15.2: Tuberculosis of lung, confirmed histologically
• A15.3: Tuberculosis of lung, confirmed by unspecified means
• A15.4: Tuberculosis of intrathoracic lymph nodes
• A15.5: Tuberculosis of larynx, trachea, and bronchus
• A15.6: Tuberculous pleurisy
• A15.7: Primary respiratory tuberculosis
• A15.8: Other respiratory tuberculosis
• A15.9: Respiratory tuberculosis unspecified

Crohn’s Disease (Granulomatous Enteritis)

• K50.011: Crohn’s disease of small intestine with rectal bleeding
• K50.012: Crohn’s disease of small intestine with intestinal obstruction
• K50.013: Crohn’s disease of small intestine with fistula
• K50.014: Crohn’s disease of small intestine with abscess
• K50.018: Crohn’s disease of small intestine with other complication
• K50.019: Crohn’s disease of small intestine without complications
• K50.111: Crohn’s disease of large intestine with rectal bleeding
• K50.112: Crohn’s disease of large intestine with intestinal obstruction
• K50.113: Crohn’s disease of large intestine with fistula
• K50.114: Crohn’s disease of large intestine with abscess
• K50.118: Crohn’s disease of large intestine with other complication
• K50.119: Crohn’s disease of large intestine without complications
• K50.811: Crohn’s disease of both small and large intestine with rectal bleeding
• K50.818: Crohn’s disease of both small and large intestine with other complication
• K50.819: Crohn’s disease of both small and large intestine without complications
• K50.911: Crohn’s disease, unspecified, with rectal bleeding
• K50.919: Crohn’s disease, unspecified, without complications

Granulomatosis with Polyangiitis (GPA)

• M31.30: Wegener’s granulomatosis without renal involvement
• M31.31: Wegener’s granulomatosis with renal involvement

Chronic Granulomatous Disease (Immunodeficiency)

• D71-: Functional disorders of polymorphonuclear neutrophils (includes CGD)

Granuloma of Specific Sites

• H10.81: Other conjunctivitis (includes granulomatous conjunctivitis)
• H32.8: Other chorioretinal disorders (includes granulomatous uveitis)
• J63.2: Berylliosis (granulomatous lung disease)
• J63.3: Silicosis (granulomatous lung disease)
• L92.0: Granuloma annulare
• L92.1: Necrobiosis lipoidica, not elsewhere classified
• L92.2: Granuloma faciale
• L92.3: Foreign body granuloma of skin and subcutaneous tissue
• L92.8: Other granulomatous disorders of skin and subcutaneous tissue
• L92.9: Granulomatous disorder of skin and subcutaneous tissue, unspecified
• K11.6: Mucocele of salivary gland (mucous extravasation granuloma)
• K62.8: Other specified diseases of anus and rectum (includes granuloma of anus)

Unspecified Granulomatous Conditions

• L92.9: Granulomatous disorder of skin and subcutaneous tissue, unspecified
• R59.0: Localized enlarged lymph nodes (may be granulomatous)
• R59.1: Generalized enlarged lymph nodes (may be granulomatous)

CPT Codes CPT codes depend on the diagnostic or therapeutic procedure performed. There is no CPT code for “granulomatous” as a diagnosis alone.

Biopsy Procedures (To Diagnose Granulomatous Inflammation)

• 11102: Tangential biopsy of skin (e.g., shave, scoop, saucerize, curette); single lesion
• 11103: … each separate/additional lesion
• 11104: Punch biopsy of skin (including simple closure); single lesion
• 11105: … each separate/additional lesion
• 11106: Incisional biopsy of skin (including simple closure); single lesion
• 11107: … each separate/additional lesion
• 32405: Biopsy of lung or mediastinum, percutaneous needle
• 32408: Biopsy of mediastinum, open
• 32505: Biopsy of pleura, percutaneous needle
• 32506: Biopsy of pleura, open
• 38221: Bone marrow; biopsy, needle or trocar
• 42104: Biopsy of lip; intraoral
• 42106: … through skin
• 42408: Biopsy of salivary gland, intraoral
• 42409: … external approach
• 43239: EGD with biopsy, single or multiple
• 45380: Colonoscopy with biopsy, single or multiple
• 60100: Biopsy thyroid, percutaneous core needle
• 60110: Biopsy thyroid, open

Pathology/Laboratory (To Analyze Granulomatous Tissue)

• 88305: Level IV - Surgical pathology, gross and microscopic examination (most tissue biopsies)
• 88307: Level V - Surgical pathology (complex specimens)
• 88309: Level VI - Surgical pathology (most complex)
• 88311: Decalcification procedure (for bone/bone marrow)
• 88312: Special stain, first tissue block
• 88313: Special stain, each additional tissue block
• 88341: Immunohistochemistry, first single antibody stain
• 88342: … each additional antibody stain
• 87015: Culture, acid-fast bacilli (for TB/fungal granulomas)
• 87110: Culture, fungal
• 87116: Culture, bacterial, aerobic isolate
• 87118: Culture, bacterial, anaerobic isolate
• 87140: Culture, mycobacterial (TB culture)
• 87143: Culture, mycobacterial with identification
• 87147: Culture, mycobacterial with sensitivity
• 87149: Nucleic acid detection, Mycobacterium tuberculosis (PCR)
• 87150: Nucleic acid detection, other infectious agents

Imaging (To Locate Granulomatous Lesions)

• 71045: Radiologic examination, chest; single view
• 71046: … two views
• 71047: … complete, minimum of 4 views
• 71250: CT thorax without contrast
• 71260: CT thorax with contrast
• 71270: CT thorax without and with contrast
• 71550: MRI thorax without contrast
• 71551: MRI thorax with contrast
• 71552: MRI thorax without and with contrast

Therapeutic Procedures

• 10060: Incision and drainage of abscess (for granulomatous abscesses)
• 10120: Incision and removal of foreign body (for foreign body granuloma)
• 11200: Removal of skin tags (may include granulomatous lesions)
• 11300-11313: Shaving of epidermal/dermal lesions
• 11400-11446: Excision of benign lesions
• 11600-11646: Excision of malignant lesions

Important Coding Notes:

• Specificity: “Granulomatous” alone is insufficient for coding; the underlying disease and organ system must be documented.
• Biopsy Coding: Pathology codes (88305-88309) are billed by the pathologist; biopsy procedure codes are billed by the performing physician.
• Infectious vs. Non-Infectious: Critical distinction for coding (TB/fungal vs. sarcoidosis/autoimmune).
• Multiple Sites: If granulomatous disease affects multiple organs, code each site separately when applicable.
• Chronic Granulomatous Disease (CGD): This is a specific genetic immunodeficiency (D71), distinct from general granulomatous inflammation.

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DERIVATIONS of granulomatous

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Med roots Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms