Plantar Fasciitis is one of the most common diagnoses treated in outpatient physical therapy. Roughly 2 million patients receive treatment for it every year in the United States, with a lifetime incidence of about 10% in the general population.
Plantar Fasciitis frequently appears on superbills; however, billing teams often face issues with accurate coding. The primary ICD-10 code, M72.2, has no laterality subcodes. Its symptoms overlap with heel pain and calcaneal spur, which requires separate codes. Additionally, documentation gaps around its medical necessity can trigger unwanted denials.
This guide breaks down every code you need, the CPT pairings, and the denial patterns we see most often in 2026.
The Primary ICD-10 Code for Plantar Fasciitis: M72.2
The ICD-10 code for plantar fasciitis is M72.2 — officially defined as “plantar fascial fibromatosis.” This is the only billable code for plantar fasciitis in the 2026 ICD-10-CM edition, effective October 1, 2025.
Although Plantar Fasciitis is termed “fibromatosis,” the ICD-10-CM tabular list explicitly includes the condition as an applicable term under M72.2. There is no separate code for plantar fasciitis versus plantar fascial fibromatosis.
Key Billing Facts About M72.2
- M72.2 is a single billable code with no further subdivisions.
- There are no laterality subcodes (no left, right, or bilateral variants).
- There is no chronic-specific variant. Long-standing cases still use M72.2.
- Laterality must be documented in clinical notes, not through the code itself.
- M72.2 sits in the M70–M79 soft tissue disorder block of Chapter 13 (Musculoskeletal).
Coders often search for a left or right Plantar Fasciitis code, or they use the wrong code family. Sometimes, they also use an unspecified foot pain code. This is one of the common billing mistakes they make.
M72.2 is correct regardless of side. Document the affected foot in the chart.
Related ICD-10 Codes: Heel Pain and Calcaneal Spur
Plantar Fasciitis rarely appears alone on a claim. Patients frequently report having concurrent heel pain or a calcaneal spur confirmed on imaging. These conditions require their own codes alongside M72.2.
| Code | Description | Laterality | Use With M72.2 |
|---|---|---|---|
| M72.2 | Plantar fascial fibromatosis (plantar fasciitis) | None, document in notes | Primary code |
| M79.671 | Pain in right foot, toes | Right | Secondary |
| M79.672 | Pain in left foot, toes | Left | Secondary |
| M79.674 | Pain in right toe(s) | Right | Secondary if applicable |
| M77.30 | Calcaneal spur, unspecified foot | Unspecified | Secondary (with imaging) |
| M77.31 | Calcaneal spur, right foot | Right | Secondary (with imaging) |
| M77.32 | Calcaneal spur, left foot | Left | Secondary (with imaging) |
Important: Do not use heel pain codes (M79.67-) as the primary diagnosis when Plantar Fasciitis has been clinically confirmed. M72.2 should be the primary code, with heel pain listed as secondary if separately documented. Using heel pain as the primary code when the diagnosis is plantar fasciitis can trigger medical necessity denials for PT services.
CPT Codes Commonly Paired with M72.2
Physical therapy claims for Plantar Fasciitis typically include a combination of timed therapeutic codes. Here are the CPT codes most frequently billed alongside M72.2:
| CPT Code | Description | Common Use for Plantar Fasciitis |
|---|---|---|
| 97110 | Therapeutic exercise | Calf stretching, intrinsic foot strengthening, ankle ROM |
| 97140 | Manual therapy | Soft tissue mobilization of plantar fascia, joint mobilization |
| 97112 | Neuromuscular re-education | Balance and proprioception training, gait re-education |
| 97530 | Therapeutic activities | Functional weight-bearing tasks, stair training |
| 97010 | Hot/cold packs | Ice application post-treatment (billed once per session) |
Modifier alert: When billing 97140 and 97110 on the same date of service, Modifier 59 (or X-modifiers XE, XS, XP, XU) may be required to indicate distinct services. NCCI bundling edits apply.
Also, note that 97010 (hot/cold packs) faces bundling restrictions when billed alongside 97110 or 97140. Document each service with separate clinical rationale in the SOAP note.
Common Denial Patterns for Plantar Fasciitis Claims in 2026
Here are the denial patterns our billing team encounters most frequently on Plantar Fasciitis claims:
1. Medical Necessity Denials (CO-50 / CO-96)
Payers deny claims when documentation does not show functional limitation or measurable treatment progress. For Plantar Fasciitis, this indicates that your SOAP notes must include specific findings, like pain levels, weight-bearing tolerance, gait deviations, and functional goals. Generic notes such as “patient reports heel pain, continue treatment plan” will not survive a medical necessity review.
2. Authorization Denials (CO-197)
Commercial payers like UnitedHealthcare and Aetna increasingly require prior authorization for PT beyond an initial evaluation. If your patient needs ongoing Plantar Fasciitis treatment and you have not secured or renewed authorization, the claim will be denied outright. Track authorization visit counts and expiration dates for every active patient.
3. Bundling Denials (CO-97)
Billing 97010 alongside 97140 or 97110 without proper documentation can trigger NCCI bundling edits. The payer sees the modality as included in the therapeutic code and denies the lower-value service. If both services were clinically distinct, use appropriate modifiers and document the clinical rationale separately.
4. Wrong Primary Diagnosis
Using M79.671 (foot pain) as the primary code when the clinical diagnosis is Plantar Fasciitis leads to denials. Payers cross-reference the diagnosis against the billed CPT codes. Foot pain alone does not support the medical necessity for skilled PT intervention the way a confirmed M72.2 diagnosis does.
Documentation Best Practices for M72.2 Claims
To keep Plantar Fasciitis claims clean and denial-free, make sure every encounter note includes:
- The affected side (left, right, or bilateral) documented explicitly in the note
- Objective findings: tenderness at the medial calcaneal tubercle, windlass test results, pain with first steps
- Functional limitations: difficulty with prolonged standing, walking distance, stair navigation
- Measurable goals with timeframes tied to functional outcomes
- Treatment time documented by CPT code with start and end times for each service
- If calcaneal spur is present, confirmation via imaging and separate M77.3- code
- Prior treatment history for extended episodes (to support medical necessity beyond initial visits)
Let Park Medical Billing Handle Your PT Coding
Getting the ICD-10 code for Plantar Fasciitis right is just one piece of the puzzle. There are many ways in which your clean claims can get denied, and this includes laterality documentation, NCCI bundling edits, modifier sequencing, and payer-specific authorization rules.
At Park Medical Billing, our team specializes in physical therapy billing for outpatient rehab clinics across the United States. We handle coding, claim submission, denial management, and payer follow-up, so your front desk can focus on patients, not paperwork.
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Request a free consultation to find out how much revenue your practice is leaving on the table. Contact us today or call (201) 585-7306.
Frequently Asked Questions (FAQs)
Q1. What is the ICD-10 code for plantar fasciitis?
The ICD-10 code for plantar fasciitis is M72.2, officially described as “plantar fascial fibromatosis.” Plantar fasciitis is an included term under this code. M72.2 is the only billable code for this diagnosis in the 2026 ICD-10-CM edition.
Q2. Is there a left and right ICD-10 code for plantar fasciitis?
No. M72.2 has no laterality subcodes. There is no separate code for left, right, or bilateral plantar fasciitis. The affected side must be documented in the clinical notes. Most payers now expect a laterality statement in the chart even though the code itself does not require one.
Q3. What is the difference between M72.2 and M79.671?
M72.2 is the diagnosis code for plantar fasciitis (a specific soft tissue condition). M79.671 is the code for pain in the right foot (a symptom). If plantar fasciitis has been clinically confirmed, M72.2 should be the primary diagnosis. Use M79.671 or M79.672 as secondary codes only when foot pain is separately documented alongside the fasciitis diagnosis.
Q4. Can you bill M72.2 and M77.31 (calcaneal spur) together?
Yes. When a patient has both plantar fasciitis and a calcaneal spur confirmed by imaging, both M72.2 and the appropriate M77.3- code should be reported. M72.2 is primary, and M77.31 (right) or M77.32 (left) is listed as a secondary diagnosis.
Q5. Does plantar fasciitis have a chronic ICD-10 code?
No. There is no chronic-specific ICD-10 code for plantar fasciitis. Long-standing or recurring cases still use M72.2. However, your documentation should note the duration and prior treatment history, as payers use this information to evaluate medical necessity for extended therapy episodes.
Q6. What CPT codes are used for plantar fasciitis physical therapy?
The most billed CPT codes are 97110 (therapeutic exercise), 97140 (manual therapy), 97112 (neuromuscular re-education), and 97530 (therapeutic activities). All are timed codes billed in 15-minute units under the 8-minute rule. Modifier 59 may be required when billing 97140 and 97110 on the same date of service.
Disclaimer: This content is for informational and educational purposes only. It does not constitute legal or medical advice. Always consult current CMS guidelines, AMA CPT documentation, and your payer contracts for the most up-to-date coding and billing requirements.
