Quick answer: Accessory Navicular Michigan Podiatrist is a common foot/ankle topic that affects many patients. The 2026 evidence-based approach combines proper diagnosis, conservative-first treatment, and escalation only when needed. We treat this regularly at our Howell and Bloomfield Hills practices. Call (810) 206-1402.
Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle
Last reviewed: May 2026
The most important clinical decision with Accessory Navicular Michigan Podiatrist isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
Table of Contents
- What Is an Accessory Navicular?
- Symptoms and Who Gets Them
- How We Diagnose It
- Treatment Options
- Warning Signs
- Frequently Asked Questions
You probably didn’t know you had it until the pain started. An accessory navicular is a developmental variant — not a fracture, not a tumor, not a sign of disease — but in certain patients, this small extra bone on the inner arch becomes the source of months or years of activity-limiting pain. The good news: with the right diagnosis and a proper treatment plan, the vast majority of patients achieve full resolution of symptoms.
What Is an Accessory Navicular?
The navicular bone is the boat-shaped bone on the inner side of the midfoot, serving as the keystone of the medial arch. In some individuals, a secondary ossification center develops during fetal bone formation and fails to fuse with the main navicular — leaving a separate small bone attached by fibrocartilage or forming a partial bony union. This extra bone is the accessory navicular, also known as the os naviculare or os tibiale externum. It is present bilaterally in 50–60% of affected individuals and is found equally in males and females, though symptoms occur more commonly in females due to footwear factors and hormonal ligamentous laxity.
The tibialis posterior tendon — the primary dynamic supporter of the medial arch — inserts primarily onto the navicular tuberosity. When an accessory navicular is present, part of this tendon inserts onto the accessory bone instead, altering the tendon’s mechanical advantage and creating a biomechanical vulnerability. In our clinic, we find that patients with both an accessory navicular and a flatfoot deformity have the highest symptom burden, because the tibialis posterior is already under increased stress from the collapsing arch.
Key takeaway: Most people with an accessory navicular never develop symptoms. Symptoms arise when the fibrocartilage junction (synchondrosis) becomes inflamed or unstable — most commonly in active adolescents or after an ankle sprain that stresses the posterior tibial tendon.
Who Gets Symptoms and What They Feel Like
Symptoms typically emerge in two life phases: adolescence (ages 10–16, when athletic activity peaks during growth) and early adulthood (after an ankle sprain, new sport, or change in footwear). The cardinal symptom is medial arch pain — specifically over the prominent navicular tuberosity on the inner ankle. Patients describe aching during and after activity, tenderness with direct shoe pressure over the bump, and occasionally swelling around the inner ankle. Pain worsens with prolonged standing, running, and any activity requiring repetitive push-off.
In our clinic, a consistent finding is pain with resisted inversion — when we ask the patient to push their foot inward against our hand, the tibialis posterior activation stresses the synchondrosis and reproduces the exact pain they experience with activity. This is a reliable clinical sign distinguishing accessory navicular pain from other inner ankle pathology.
How We Diagnose Accessory Navicular
Diagnosis requires weight-bearing foot X-rays — three views (AP, lateral, and oblique) are standard. The accessory bone is visible as a separate ossicle adjacent to the navicular tuberosity. MRI provides the most clinically actionable information: bone marrow edema at the synchondrosis confirms active inflammation; absence of edema in a symptomatic patient redirects the diagnostic workup toward other pain generators. In active adolescents with acute symptoms after a sprain, MRI also rules out an acute synchondrosis fracture, which requires more aggressive immobilization than chronic inflammation alone.
Treatment Options
The treatment ladder progresses from least to most invasive, with most patients achieving adequate relief before reaching surgical consideration. In our clinic, we use a structured four-phase approach:
- Phase 1 — Acute inflammation control: CAM boot immobilization for 4–6 weeks, NSAIDs, activity restriction from high-impact loading. For severe acute cases, a short-leg non-weight-bearing cast is more effective than a removable boot.
- Phase 2 — Biomechanical correction: Custom orthotic with full medial arch support and navicular unloading pad. Wide-toed shoes with adequate medial counter. Avoidance of flat or minimalist footwear that maximizes arch loading.
- Phase 3 — Rehabilitation: Physical therapy targeting tibialis posterior strengthening, intrinsic foot muscle activation, and single-leg proprioceptive training. Return to sport progressively with orthotic in place.
- Phase 4 — Injection and surgery: Corticosteroid injection into the synchondrosis for patients with persistent MRI edema. Kidner procedure (accessory bone excision + tibialis posterior tendon reattachment) for those who fail structured conservative care after 3–6 months.
⚠️ See a podiatrist if any of these apply:
- Inner arch pain that hasn’t improved after 6 weeks of rest and basic shoe changes
- A visible or growing bump on the inner ankle causing shoe pain
- Progressive flatfoot alongside inner arch tenderness
- Inability to push off or perform a single-leg heel raise due to arch pain
Visit Balance Foot & Ankle — Same-Day Appointments Available
Our podiatry team serves patients throughout Michigan including Howell, Brighton, and Bloomfield Hills. Whether you’re dealing with heel pain, ingrown toenails, or a foot injury, we have same-day appointment availability.
Same-day appointments available. (810) 206-1402
Doctor Hoy’s Natural Pain Relief Gel
Natural topical pain relief I use in our clinic. Arnica + camphor formula — apply directly to the area 3–4x daily. ($20–25)
Shop Doctor Hoy’s →Frequently Asked Questions
Is an accessory navicular serious?
In the majority of people who have one, an accessory navicular is incidental and never causes any problem. For the minority who develop accessory navicular syndrome, it is a genuinely painful condition that can limit activity significantly — but it is entirely treatable. When properly managed, the prognosis is excellent: most patients return to full activity, and surgical results exceed 85% satisfaction at long-term follow-up.
Can an accessory navicular cause flatfoot?
Yes, indirectly. The tibialis posterior tendon’s altered insertion mechanics reduce its efficiency as an arch supporter, contributing to progressive arch collapse in susceptible feet. The relationship is bidirectional — flatfoot also increases tibialis posterior stress, worsening synchondrosis inflammation. Addressing both the accessory navicular and the flatfoot component is important for lasting relief.
What happens if an accessory navicular is left untreated?
Many symptomatic accessory navicular cases gradually improve with time, footwear changes, and activity modification — particularly in adolescents who become less active or whose symptoms settle after skeletal maturity. However, patients who ignore persistent pain and continue high-impact activity risk progressive synchondrosis degeneration, tibialis posterior tendon overload, and worsening flatfoot deformity. Early management is more effective than waiting for advanced structural changes.
The bottom line: An accessory navicular is not a disease — it’s an anatomical variant that becomes a clinical problem for a subset of patients. Identifying it early, pairing it with proper biomechanical management, and escalating to surgery only when necessary produces excellent outcomes in the vast majority of patients.
Sources: (1) Pretell-Mazzini J et al. Orthopedics 2010. (2) Ugolini PA, Raikin SM. Foot Ankle Clin 2004. (3) Miller TT et al. Skeletal Radiol 1995. (4) Scott AT et al. Foot Ankle Int 2007.
Accessory Navicular Pain? Get a Clear Diagnosis Today.
Same-day appointments available in Howell & Bloomfield Hills, MI
4.9★ | 1,123 Reviews | 3,000+ Surgeries
Or call: (810) 206-1402
Frequently Asked Questions
When should I see a podiatrist?
If symptoms persist past 2 weeks, affect your normal activity, or are accompanied by red-flag symptoms (warmth, redness, swelling, inability to bear weight).
What does treatment cost?
Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Out-of-pocket costs vary by your specific plan.
How quickly can I get an appointment?
Most non-urgent cases see us within 5 business days. Urgent cases (sudden pain, possible fracture) typically same or next business day.
What is Foot pain?
Foot pain is a common foot/ankle condition that affects mobility and quality of life. Understanding the underlying cause is the first step in successful treatment. Our podiatrists at Balance Foot & Ankle perform a hands-on biomechanical exam, review your activity history, and use diagnostic imaging when appropriate to identify the root cause—not just treat the symptom. Many patients have been told to “rest and ice” without a deeper diagnostic workup; our approach is different.
Symptoms and warning signs
Common signs of foot pain include pain that worsens with activity, morning stiffness, swelling, tenderness when palpated, and difficulty bearing weight. If you experience sudden severe pain, inability to walk, visible deformity, numbness or color change, contact our office the same day or visit urgent care—these can signal a more serious injury such as a fracture, tendon rupture, or vascular compromise. Diabetics with any foot wound should seek same-day care.
Conservative treatment options
Most cases of foot pain respond to non-surgical care: structured rest, supportive footwear changes, custom orthotics, targeted stretching and strengthening protocols, anti-inflammatory medications when medically appropriate, and in-office procedures such as ultrasound-guided injections. We also offer advanced therapies including MLS laser therapy, EPAT/shockwave, regenerative injections, and image-guided procedures. Treatment is sequenced from least invasive to most invasive, and we explain the rationale at every step.
When is surgery considered?
Surgery is reserved for cases that fail 3-6 months of well-structured conservative care, when there is structural pathology (severe deformity, complete tear, advanced arthritis), or when imaging shows damage that will not heal without intervention. Our surgeons have performed 3,000+ foot and ankle procedures and prioritize minimally-invasive techniques whenever appropriate. We discuss recovery timelines, return-to-activity milestones, and realistic outcome expectations before any procedure is scheduled.
OrthoInfo – AAOS: Accessory Navicular Syndrome
Recovery timeline and prevention
Recovery from foot pain varies based on severity and chosen treatment path. Conservative cases often improve within 4-8 weeks with consistent adherence to the protocol. Post-procedural recovery may range from a few days (in-office procedures) to several months (reconstructive surgery). Long-term prevention involves footwear assessment, activity modification, structured strengthening, and regular check-ins with your podiatrist if you have a history of recurrence. We provide written home-exercise plans and digital follow-up support.
Ready to feel better?
Same-week appointments available in Howell and Bloomfield Hills, Michigan.
Book Your VisitOur podiatrists treat the underlying cause, not just the symptom. Same-week appointments at our Howell and Bloomfield Hills, Michigan offices.
Same-Week Appointments in Howell & Bloomfield Hills
Three board-certified podiatric surgeons. 1,123+ five-star reviews. Most insurance accepted.
Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has made him one of the most-followed foot & ankle educators on YouTube.