Summary: “The ICD-10 code for plantar fasciitis is M72.2 (plantar fascial fibromatosis). M72.2 carries no laterality digit, so the foot side rides on the CPT line. Heel pain maps to M79.67-, and a calcaneal spur maps to M77.3-. This guide covers M72.2, the related heel and spur codes, the CPT codes and modifiers they pair with, and the denials coders see most often in 2026.”
Plantar fasciitis is the most common cause of heel pain in adults. The American Academy of Orthopaedic Surgeons reports that about 2 million patients receive treatment for plantar fasciitis each year. The ICD-10 code for plantar fasciitis is M72.2.
American Family Physician data place plantar fasciitis at roughly 1 million patient visits per year, with about 60% reaching primary care. The lifetime incidence reaches 10%, and the incidence rises in women aged 40 to 60. Accurate podiatry billing services start with coding each encounter to M72.2.
This guide covers the plantar fasciitis ICD-10 code, M72.2, plus the heel pain codes (M79.67-) and the calcaneal spur codes (M77.3-). The guide also pairs each diagnosis with its CPT codes and modifiers. The 2026 ICD-10-CM edition took effect on October 1, 2025. Every code reflects the FY2026 set.
What Is the ICD-10 Code for Plantar Fasciitis?
The ICD-10 code for plantar fasciitis is M72.2, defined as plantar fascial fibromatosis. The plantar fasciitis ICD-10 code is a single billable code with no further subdivisions. M72.2 sits in the M70 to M79 soft-tissue block of Chapter 13.
The table below maps plantar fasciitis to its two adjacent code families used later in this guide.
| Condition | ICD-10 Code | Laterality |
|---|---|---|
| Plantar fasciitis (plantar fascial fibromatosis) | M72.2 | None |
| Heel and foot pain | M79.671, M79.672, M79.673 | Right, left, unspecified |
| Calcaneal spur | M77.30, M77.31, M77.32 | Unspecified, right, left |
M72.2 names the diagnosis, while the M79.67- and M77.3- codes capture related pain and bony findings.
How Does ICD-10-CM Define Plantar Fascial Fibromatosis (M72.2)?
M72.2 defines plantar fascial fibromatosis, the diagnostic term for plantar fasciitis and plantar fasciopathy. The condition describes degenerative irritation of the plantar fascia at the medial calcaneal tubercle. NIH StatPearls notes the absence of inflammatory cells, which is why clinicians also use the term plantar fasciopathy.
Why Is Plantar Fasciitis Coded M72.2 and Not Another M72 Code?
Plantar fasciitis is coded M72.2 because M72 is a category of unrelated fibroblastic disorders, not a single disease. M72.0 covers Dupuytren contracture of the hand. M72.1 covers knuckle pads. M72.6 covers necrotizing fasciitis, a severe infection. Only M72.2 describes the plantar fascia, so the rest of M72 never applies to heel pain.
Is There a Separate ICD-10 Code for Left or Right Plantar Fasciitis?
No separate code exists for left or right plantar fasciitis. Left plantar fasciitis and right plantar fasciitis both use M72.2, because M72.2 has no laterality character. Coders record the affected foot on the procedure line using modifier RT or LT, never on the diagnosis code.
What Is the ICD-10 Code for Bilateral Plantar Fasciitis?
The ICD-10 code for bilateral plantar fasciitis is M72.2, reported once. ICD-10-CM provides no dedicated bilateral code for plantar fasciitis. A claim for a bilateral procedure carries modifier 50 or modifiers RT and LT, while the diagnosis stays M72.2.
What Is the Difference Between Plantar Fasciitis and Plantar Fibromatosis (Ledderhose Disease)?
Plantar fasciitis and Ledderhose disease both fall under M72.2 but describe different findings. Plantar fasciitis is degenerative heel pain at the fascia origin. Ledderhose disease forms fibrous nodules along the mid-arch fascia. Documentation distinguishes the two clinically, though the billable code remains M72.2.
Why Does Code Specificity Affect Plantar Fasciitis Reimbursement?
Code specificity affects plantar fasciitis reimbursement at the point of medical necessity. A documented M72.2 diagnosis supports injection, shockwave, and surgical claims. Defaulting to unspecified foot pain (M79.673) when the chart confirms plantar fasciitis weakens medical necessity and raises denial risk on procedural lines.
What Are the Related ICD-10 Codes for Heel and Plantar Pain?
The related codes for heel and plantar pain span three categories, grouped here by clinical relevance rather than by code family. These codes form part of the broader podiatry ICD-10 codes set for foot and ankle billing.
What Is the ICD-10 Code for Heel Pain? (M79.67-)
No dedicated heel pain code exists in ICD-10-CM. Heel pain maps to foot pain codes when the provider documents no cause. Right heel pain uses M79.671, left heel pain uses M79.672, and M79.673 covers an unspecified foot.
| Code | Description |
|---|---|
| M79.671 | Pain in right foot |
| M79.672 | Pain in left foot |
| M79.673 | Pain in unspecified foot |
Coders apply M79.67- only when the provider documents heel pain without a confirmed diagnosis, such as plantar fasciitis.
What Is the ICD-10 Code for a Calcaneal Spur (Heel Spur)? (M77.3-)
The ICD-10 code for a calcaneal spur is M77.30, M77.31, or M77.32 by laterality. The calcaneal spur ICD-10 codes belong to the M77.3- family. A spur is a distinct finding from plantar fasciitis, and both codes report together when documentation supports each.
| Code | Description |
|---|---|
| M77.30 | Calcaneal spur, unspecified foot |
| M77.31 | Calcaneal spur, right foot |
| M77.32 | Calcaneal spur, left foot |
The AAOS reports that about 1 in 10 people have heel spurs, yet only 1 in 20 with a spur reports foot pain. A spur, therefore, supports a claim only when the chart links it to symptoms.
Which Differential Diagnoses Are Coded Alongside Heel Pain?
Five differential diagnoses share the heel pain workup and carry their own codes. Each one routes to a distinct part of the foot and ankle code set.
- Achilles tendinitis: M76.6-
- Tarsal tunnel syndrome: G57.5-
- Calcaneal stress fracture: documented fracture codes by site
- Plantar fat pad atrophy: soft-tissue codes by finding
- Sever disease (calcaneal apophysitis): M92.6, used in pediatric patients
How Do You Code Bilateral Heel Pain?
Bilateral heel pain reports two codes, M79.671 and M79.672, because no single bilateral foot-pain code exists. When plantar fasciitis affects both feet, the diagnosis stays M72.2 reported once, as covered above.
How Do You Choose the Correct Plantar Fasciitis ICD-10 Code?
Correct code selection for heel pain follows a three-step decision path. Each step matches the documentation to one code. Coders cross-reference the full ICD-10 codes guide when the chart presents more than one finding.
What Is the Step-by-Step Logic for Coding Heel Pain?
The decision path moves from confirmed diagnosis to symptom to bony finding.
- Confirmed plantar fasciitis: assign M72.2.
- Calcaneal spur on imaging with symptoms: add M77.3- by side.
- Heel pain with no established cause: assign M79.67- by side.
When Should You Code M72.2 Instead of M79.67- (Foot Pain)?
Coders assign M72.2 when the provider documents plantar fasciitis as the diagnosis. M79.67- applies only to a symptom-only encounter, where the note records heel pain but names no cause. A confirmed diagnosis always takes precedence over a symptom code.
How Do Excludes Notes Apply to M72.2 and M79.67-?
Excludes notes control, which codes reports together. M79.67- carries Excludes1 notes that block pain codes when a definitive musculoskeletal diagnosis exists. Once a provider confirms plantar fasciitis, M72.2 replaces the M79.67- pain code rather than joining it.
What Documentation Supports a Plantar Fasciitis ICD-10 Claim?
Documentation supports a plantar fasciitis claim when the note records the diagnosis, the side, the exam findings, and the prior care. Complete documentation supports both the diagnosis code and the procedural CPT codes.
What Clinical Elements Must the Provider’s Note Contain?
The provider note contains five elements for a clean M72.2 claim.
- Diagnosis: plantar fasciitis or plantar fascial fibromatosis
- Side: right, left, or bilateral for the procedure line
- Onset and chronicity: acute or chronic, with duration
- Exam findings: positive windlass test, first-step pain, point tenderness at the medial calcaneal tubercle
- Conservative care: prior treatments and patient response
What Imaging Supports the Diagnosis? (X-Ray, Ultrasound, MRI)
Imaging supports the diagnosis and the medical necessity for procedures. A foot x-ray identifies a calcaneal spur. Ultrasound measures plantar fascia thickness above 4 mm. MRI documents refractory cases before surgery. Imaging confirms findings but does not change the M72.2 code itself.
How Should Conservative-Care Failure Be Documented for ESWT and Surgery?
Conservative-care failure documentation records each trial and its result. Payers require this trail before extracorporeal shockwave therapy or surgery. The note lists NSAIDs, stretching, physical therapy, orthotics, a night splint, and any injection, with dates and responses.
Which CPT Codes and Modifiers Pair With Plantar Fasciitis ICD-10 Codes?
Plantar fasciitis ICD-10 codes pair with CPT codes for injections, shockwave therapy, strapping, imaging, and surgery. Correct CPT-to-ICD-10 pairing supports medical necessity and prevents denials.
Which CPT Codes Are Billed With Plantar Fasciitis (M72.2)?
The table below lists the CPT and HCPCS codes most billed with M72.2 and the related heel codes.
| CPT/HCPCS | Description | Common ICD-10 Pairing |
|---|---|---|
| 20550 | Injection, plantar fascia (ligament or aponeurosis) | M72.2 |
| 20551 | Injection, tendon origin or insertion | M72.2 |
| 28890 | High-energy extracorporeal shockwave therapy, plantar fascia | M72.2 |
| 29893 | Endoscopic plantar fasciotomy | M72.2 |
| 28008 | Fasciotomy, foot or toe | M72.2 |
| 28060 / 28062 | Plantar fasciectomy, partial / radical | M72.2 |
| 28119 | Ostectomy, calcaneus (heel spur excision) | M77.3- |
| 29540 | Strapping, ankle and foot (Low-Dye taping) | M72.2, M79.67- |
| 73630 / 73650 | X-ray, foot / calcaneus | M77.3-, M72.2 |
| L4396 / L4397 | Plantar fasciitis night splint | M72.2 |
Injection and shockwave codes carry the highest claim volume, while the surgical codes apply to the 5% to 10% of cases that resist conservative care.
Plantar Fascia Injection (CPT 20550)
CPT 20550 reports a single injection into the plantar fascia ligament. The code pairs with M72.2 and carries the foot side through modifier RT or LT.
Extracorporeal Shockwave Therapy (CPT 28890)
CPT 28890 reports high-energy shockwave therapy to the plantar fascia. Many payers classify CPT 28890 as investigational, so prior authorization and conservative-care documentation precede the claim.
Plantar Fasciotomy and Fasciectomy (CPT 28008, 28060, 28062, 29893)
CPT 28060 and 28062 report partial and radical plantar fasciectomy. CPT 29893 reports endoscopic plantar fasciotomy. Each surgical claim requires documented failure of conservative care.
Strapping and Low-Dye Taping (CPT 29540)
CPT 29540 reports strapping of the ankle and foot, including Low-Dye taping for plantar fasciitis. The code pairs with M72.2 or a heel pain code when taping supports the arch.
Which HCPCS Codes Cover Orthotics and Night Splints for Plantar Fasciitis?
HCPCS codes cover custom orthotics and night splints billed as durable medical equipment. L3000 covers a custom foot orthotic. L3020 covers an arch insert. L4396 and L4397 cover a plantar fasciitis night splint. Coverage requires documentation and the KX or GA modifier.
Which Modifiers Apply Most Often to Plantar Fasciitis Claims?
Modifiers RT, LT, 50, 25, and 59 apply most often to plantar fasciitis claims. Because M72.2 has no laterality, these modifiers carry the side and the service detail.
When Do You Use RT and LT to Carry the Foot Side?
Modifiers RT and LT record the right or left foot on the procedure line. M72.2 carries no side, so an absent RT or LT triggers automated edits on foot procedures.
When Do You Use Modifier 50 for Bilateral Procedures?
Modifier 50 reports a bilateral procedure, such as a bilateral plantar fascia injection in one session. Coders confirm the CPT is not already bilateral before adding modifier 50.
When Do You Use Modifier 25 With a Same-Day Injection?
Modifier 25 reports a significant, separate evaluation and management service on the same day as an injection. The note documents the distinct service.
When Do You Use Modifier 59 or XU?
Modifier 59 or XU reports a distinct procedural service, such as an injection plus strapping on the same day. The modifier separates the two procedures for payment.
How Do You Avoid CPT-ICD-10 Mismatches on Foot Claims?
Coders avoid mismatches by aligning the procedure side with the documented foot and the diagnosis with the procedure. A right plantar fascia injection (20550, RT) pairs with M72.2 and a right-side note, never with a left-foot record.
What Are the Most Common Plantar Fasciitis Coding Denials, and How Do You Prevent Them?
The most common plantar fasciitis denials come from unspecified pain codes, a missing procedure side, absent conservative-care documentation, and CPT-ICD-10 mismatches.
Why Do Unspecified Foot Pain Codes (M79.673) Drive Denials?
Unspecified foot pain codes drive denials because procedural claims expect a confirmed diagnosis. A 20550 injection paired with M79.673 instead of M72.2 weakens medical necessity. Payers downgrade or deny the line when the chart supports the specific code.
How Does a Missing Procedure Side Cause Rejections?
A missing procedure side causes rejections because M72.2 carries no laterality. Without a modifier RT or LT on the CPT line, automated payer edits flag the claim for a laterality gap and hold payment.
Why Are ESWT and Injection Claims Denied Without Conservative-Care Documentation?
Shockwave and repeat-injection claims face denial when the chart lacks a conservative-care trail. Payer policies require NSAIDs, stretching, orthotics, and time before advanced treatment. High-volume foot and ankle groups partner with podiatry billing companies to manage these appeals and documentation reviews.
How Do Payer-Specific Rules Change Plantar Fasciitis Reimbursement?
Each payer applies its own rules to plantar fasciitis procedures. The table below summarizes common payer positions.
| Payer | Common Rule |
|---|---|
| Medicare | LCDs require conservative-care documentation for injections and surgery; orthotic coverage is limited |
| BCBS plans | Shockwave therapy often denied as investigational; coverage varies by state plan |
| UnitedHealthcare | Prior authorization required for shockwave therapy and most surgical foot procedures |
| Aetna | Step therapy and conservative-care trial required before advanced treatment |
Payers share one pattern: a specific M72.2 diagnosis, the correct side, and a conservative-care trail support payment across plans.
What Changed in the FY2026 ICD-10-CM Update for Plantar Fasciitis and Heel Pain?
The FY2026 ICD-10-CM update took effect on October 1, 2025, and preserved the codes for plantar fasciitis and heel pain. The National Center for Health Statistics and CMS publish the annual code set.
Were M72.2, M77.3-, or M79.67- Codes Revised for FY2026?
M72.2, the M77.3- spur codes, and the M79.67- foot pain codes carried no structural change in FY2026. Practices confirm descriptors against the CMS-published FY2026 code set before billing.
What 2026 Coding Workflows Should Practices Confirm?
Practices confirm two workflows for 2026. First, EHR diagnosis pick-lists carry the current M72.2 descriptor. Second, foot procedure templates force an RT or LT entry, because M72.2 supplies no side of its own.
Frequently Asked Questions About Plantar Fasciitis ICD-10 Coding
What Is the ICD-10 Code for Plantar Fasciitis?
The ICD-10 code for plantar fasciitis is M72.2, plantar fascial fibromatosis. M72.2 applies to right, left, and bilateral presentations because the code carries no laterality.
Is There a Separate ICD-10 Code for Left or Right Plantar Fasciitis?
No separate left or right code exists. Both sides use M72.2, and the foot side reports through modifier RT or LT on the procedure.
What Is the ICD-10 Code for Bilateral Plantar Fasciitis?
The ICD-10 code for bilateral plantar fasciitis is M72.2, reported once. A bilateral procedure carries modifier 50 or modifiers RT and LT.
What Is the ICD-10 Code for Heel Pain?
Heel pain with no confirmed cause uses M79.671 (right), M79.672 (left), or M79.673 (unspecified foot). A confirmed plantar fasciitis diagnosis replaces these codes with M72.2.
What Is the ICD-10 Code for a Heel Spur?
A heel spur uses M77.30 (unspecified), M77.31 (right), or M77.32 (left). The spur code reports with M72.2 when documentation supports both findings.
Can You Report M72.2 and M77.3- Together?
Yes. M72.2 and a M77.3- spur code report together when the chart documents plantar fasciitis and a symptomatic calcaneal spur in the same foot.
What CPT Code Is Used for a Plantar Fasciitis Injection?
CPT 20550 reports a plantar fascia injection. The code pairs with M72.2 and carries the foot side through modifier RT or LT.
Is ESWT for Plantar Fasciitis Covered by Insurance?
Extracorporeal shockwave therapy (CPT 28890) faces frequent denial as investigational. Coverage requires prior authorization and documented failure of conservative care.
