periostitis

DEFINITION of periostitis

periostitis is the inflammation of the periosteum, a dense layer of vascular connective tissue that envelops the bones. The condition is generally chronic and is marked by tenderness, swelling of the bone, and an aching pain. Acute periostitis is due to infection and is characterized by diffuse suppuration, severe pain, and constitutional symptoms, and it usually results in necrosis. periostitis is distinct from osteomyelitis, which is inflammation of the bone marrow and adjacent bone; periostitis is limited to the outer fibrous covering. It can be physiological, such as the benign periosteal reaction seen in growing children, or pathological, as seen in infectious, traumatic, or neoplastic conditions. Clinically, it is commonly encountered as shin splints (medial tibial stress syndrome) and as orbital periostitis (H05.03-). The key difference from osteitis is that periostitis involves only the periosteum, whereas osteitis involves the bone tissue itself.

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ETYMOLOGY of periostitis

greek

Component	Origin	Meaning
peri-	Greek περί (perí)	“around,” “about” — a prefix denoting surrounding or enveloping
oste-	Greek ὀστέον (osteon)	“bone” — the combining form for bone
-itis	Greek -ῖτις (-itis)	“pertaining to” — a suffix forming nouns denoting inflammation

The word entered English in the 1835-1845 period as periostitis (noun), borrowed from New Latin, from periosteum + -itis — literally “inflammation around the bone.” The root osteon (“bone”) connects PERIOSTITIS to the entire -OSTE- ROOT FAMILY: osteomyelitis (osteon + myelos + -itis → inflammation of bone and marrow), osteoporosis (osteon + poros + -osis → porous bone), and osteophyte (osteon + phyton → bone growth). The prefix peri- is highly productive in medical terminology, appearing in pericarditis (inflammation around the heart), peritonitis (inflammation of the peritoneum), perineum (area around the anus), periodontitis (inflammation around the tooth), and peripheral (pertaining to the outer boundary).

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🔀 ALIASES / ALTERNATE TERMS

• Periosteitis (alternative spelling; identical meaning)
• Periostitic (adjective form — “periostitic changes,” “periostitic bone reaction”)
• Periostalgia (clinical synonym denoting pain in the periosteum)
• Shin splints (lay term for medial tibial stress syndrome, a common form of periostitis)[reference:9]
• Medial tibial stress syndrome (clinical descriptor for exercise-induced periostitis of the tibia)
• Orbital periostitis (anatomic subtype — H05.03-; inflammation of periosteum of the orbit)
• Dental periostitis (anatomic subtype — inflammation of the periosteum of the jaw or maxilla, usually bacterial)
• Simple periostitis (etiological subtype — aseptic, often post-traumatic)
• Fibrous periostitis (etiological subtype — chronic with thickening of the periosteum by connective tissue)
• Purulent periostitis (etiological subtype — suppurative form due to infection)
• Ossifying periostitis (etiological subtype — with new bone formation)
• Syphilitic periostitis (etiological subtype — due to syphilis infection; A51.4+)
• Tuberculous periostitis (etiological subtype — due to tuberculosis)

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🔗 RELATED TERMS

• Osteomyelitis — inflammation of bone and bone marrow; often co-occurs with or follows periostitis; distinguished by involvement of the medullary cavity
• osteitis — inflammation of bone tissue itself; periostitis is limited to the periosteum, while osteitis involves the bone proper
• Periosteum — the dense fibrous membrane whose inflammation defines periostitis; provides nutrient supply and osteogenic potential
• Osteophyte — bony outgrowth; can result from chronic ossifying periostitis
• Shin splints — common clinical presentation of periostitis; exercise-induced traction periostitis of the tibia
• Periodontitis — inflammation of the tissues around the tooth; shares the peri- root but affects dental supporting structures
• Pericarditis — inflammation of the pericardium; shares the peri- prefix denoting surrounding structure
• Bone scan — diagnostic procedure; radionuclide imaging can detect increased uptake in periostitis
• MRI — diagnostic procedure; can show periosteal reaction and soft tissue changes
• X-ray — diagnostic procedure; can show periosteal reaction, bone thickening, or new bone formation

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CODING CORNER

🏥 ICD-10-CM CODES

Periostitis of Orbit (H05.03- — Laterality Required)

Code	Description
H05.031	Periostitis of right orbit
H05.032	Periostitis of left orbit
H05.033	Periostitis of bilateral orbits
H05.039	Periostitis of unspecified orbit

Infectious/Parasitic Causes

Code	Description
A66.6	Yaws gummatous osteitis or periostitis — yaws periostitis (hypertrophic)
A51.4	Secondary syphilitic periostitis (with M90.10)

Osteomyelitis / Periostitis without Osteomyelitis

Code	Description
M86.9	Osteomyelitis, unspecified — includes Periostitis without osteomyelitis

Periorbital / Orbital Disorders — Type 2 Excludes Notes

Code	Description
H05.0-	Acute inflammation of orbit — code category only

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🔧 COMMON CPT CODES (Periostitis-Related Diagnosis & Treatment)

CPT Code	Description
2026-CPT-10060	Incision and drainage of abscess (e.g., carbuncle, suppurative hidradenitis, other cutaneous or subcutaneous abscess, cyst, furuncle, or paronychia); simple or single
2026-CPT-20205	Biopsy, bone, deep (e.g., iliac crest, sternum); needle or trocar
20206	Biopsy, bone, deep (e.g., iliac crest, sternum); open
20220	Biopsy, bone, superficial (e.g., tibia, fibula, radius, ulna, clavicle, scapula); needle or trocar
20225	Biopsy, bone, superficial; open
20240	Biopsy, bone, excisional; superficial (e.g., rib, fibula, tibia, clavicle)
20245	Biopsy, bone, excisional; deep (e.g., iliac crest, sternum, vertebra)
73200	Computed tomography, upper extremity; without contrast material
73700	Computed tomography, lower extremity; without contrast material
77071	Bone survey, complete (including all views of multiple bones)
77072	Bone age study
77073	Bone length studies (orthoroentgenogram, scanogram)
78300	Bone and/or joint imaging; limited area
78305	Bone and/or joint imaging; multiple areas
78306	Bone and/or joint imaging; whole body

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⚠️ Coding Note: For orbital periostitis (H05.03-), laterality must be specified — right, left, bilateral, or unspecified. For infectious periostitis, the underlying infection should be coded first, with the periostitis code as a secondary manifestation (e.g., A51.4+ with M90.10 for secondary syphilitic periostitis*). A commonly missed code on inpatient profee claims is M86.9 for periostitis without osteomyelitis — documentation triggers such as “periosteal reaction,” “bone pain with tenderness,” or “shin splints” should prompt a query. For Medicare and most payers, bone scans (78300-78306) and MRI (73200, 73700) may require prior authorization; confirm medical necessity with documented symptoms and failed conservative therapy. When coding yaws-related periostitis, use A66.6 which includes yaws periostitis (hypertrophic).

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DERIVATIONS of periostitis

TABLE definition AS Definition
FROM #medterm 
WHERE length(filter(roots, (word) => econtains([[Periostitis]].roots, word))) > 0 AND file.name != [[Periostitis]].file.name
SORT file.name ASC

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Query functionality

TABLE definition AS Definition
FROM #medterm 
WHERE file.name != this.file.name
AND any(contains(this.definition, definition))

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