ICD-10 F40.10 / F40.11: Social Anxiety Disorder Billing Guide
Social phobia unspecified (F40.10) vs generalized (F40.11) — clinical distinctions, performance-only specifier, CBT documentation, and CPT code pairing.
2026-03-28 · 5 min read · By The Superbilled Team
ICD-10 F40.10 and F40.11 cover Social Anxiety Disorder (Social Phobia) — one of the most prevalent anxiety diagnoses in outpatient therapy. The distinction between unspecified and generalized presentations affects documentation and, in some cases, prior authorization decisions.
What Does ICD-10 F40.10 / F40.11 Mean?
F40.10 and F40.11 both map to the DSM-5 diagnosis of Social Anxiety Disorder (SAD). To support either code, the clinical record must document:
- Marked fear or anxiety about one or more social situations in which the person is exposed to possible scrutiny by others
- Fear of acting in a way that will be humiliating or embarrassing
- Social situations almost always provoke fear or anxiety
- Social situations are avoided or endured with intense distress
- Fear or anxiety out of proportion to the actual threat
- Duration of 6 months or more
- Clinically significant distress or functional impairment
F40 Social Anxiety Subcodes
| Code | Description |
|---|---|
| F40.10 | Social phobia, unspecified. Use when the full generalized vs. performance-only distinction has not yet been established, or when anxiety spans multiple but not all social situations. |
| F40.11 | Social phobia, generalized. Use when fear and avoidance extend to most social situations — not limited to performance contexts. The more common subtype in clinical practice. |
| F40.8 | Other specified phobic anxiety disorder. |
| F40.9 | Phobic anxiety disorder, unspecified. Avoid unless no more specific code applies. |
The Performance-Only Specifier
DSM-5 includes a “performance only” specifier for SAD — when fear is restricted to speaking or performing in public. ICD-10 does not have a dedicated code for this specifier. In practice:
- Performance-only SAD maps to F40.10(unspecified), as the fear does not meet the threshold for “generalized” (most social situations)
- Note the performance-only specifier in your clinical documentation to support the code selection and distinguish from F40.11
- Some payers may question F40.11 if the record only describes performance anxiety — ensure the documentation matches the subcode used
F40.10 / F40.11 vs Related Codes
- F41.1 — Generalized Anxiety Disorder. Social situations are a worry focus, but anxiety also permeates non-social domains. See the F41.1 billing guide.
- F40.00 — Agoraphobia, unspecified. Fear of situations where escape may be difficult — distinct from fear of social scrutiny.
- F41.0 — Panic Disorder. Recurrent unexpected panic attacks without the social-evaluation trigger that defines SAD.
How to Bill ICD-10 F40 on a Superbill
F40.10 and F40.11 do not require prior authorization at most commercial plans for standard outpatient psychotherapy. Cognitive Behavioral Therapy (CBT) with exposure components is the evidence-based treatment; document the treatment modality and goals in the clinical notes to support medical necessity.
CPT Codes Commonly Paired With F40.10 / F40.11
- 90837 — 60-minute individual psychotherapy. Standard for CBT with exposure work, which typically requires longer sessions to conduct in-session exposures.
- 90834 — 45-minute individual psychotherapy. Appropriate for structured CBT protocols or maintenance-phase sessions.
- 90791 — Psychiatric diagnostic evaluation. Use at intake to document the full diagnostic picture, including symptom severity and functional impact.
- 90853 — Group psychotherapy. Social anxiety group therapy (exposure group) is an evidence-based format; document as group therapy with diagnosis F40.11.
Documentation Requirements
- Specific social situations feared and avoided (generalized vs performance-only)
- Duration of symptoms (6+ months required)
- Functional impairment: occupational, academic, or social consequences
- Standardized assessment if used (LSAS — Liebowitz Social Anxiety Scale; SPIN)
- Rule-out of autism spectrum disorder (F84.0), which can also present with social withdrawal but has different etiology
- CBT treatment plan with exposure hierarchy if applicable
Common Denial Reasons
- Vague impairment documentation:“Avoids social situations” without specifying which situations, frequency, or functional consequence is insufficient for medical necessity.
- Code mismatch to presentation: Using F40.11 (generalized) when notes describe only public speaking anxiety — document broadly or use F40.10.
- Lack of treatment specificity: Some payers require documentation that an evidence-based treatment (CBT, exposure) is being used for anxiety disorders. Name the modality in your treatment plan.
Generate a Superbill With F40
Superbilled makes it easy to add F40.10 or F40.11 to your superbill alongside the appropriate CPT code, with all required provider and session fields pre-filled. Start generating superbills free.