FY2027 ICD-10-CM reference
F21: Schizotypal disorder
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Schizotypal disorder. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
Oct to Dec 2026, PY2027
CMS-HCC V28
Mapped- HCC 153Personality Disorders; Anorexia/Bulimia NervosaCoefficient 0.396 (CNA, PY2027)
CMS-HCC V24
Not used by CMSESRD
Mapped- HCC 60Personality DisordersCoefficient 0.066 (Dialysis CE, PY2027)
RxHCC
Mapped- HCC 133Anxiety and Other Psychiatric DisordersCoefficient 0.023 (MA-PD CE non-low aged, PY2027)
PACE (CMS-HCC V22 component)
No CMS categoryPACE ESRD (ESRD V21 component)
No CMS categoryPACE RxHCC (2018/2019 component)
Mapped- HCC 133Anxiety and Other Psychiatric Disorders
Jan to Sep 2027, PY2028
CMS-HCC V28
Not published by CMSCMS-HCC V24
Not published by CMSESRD
Not published by CMSRxHCC
Not published by CMSPACE (CMS-HCC V22 component)
Not published by CMSPACE ESRD (ESRD V21 component)
Not published by CMSPACE RxHCC component
Not published by CMSOct to Dec 2026, BY2026
HHS-HCC
PendingJan to Sep 2027, BY2027
HHS-HCC
Not published by CMSFY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Includes
disorders of psychological development
Source: F01-F99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Source: F01-F99 (chapter, inherited).
Instructional note
Borderline schizophrenia
Source: F21 (category, direct).
Instructional note
Latent schizophrenia
Source: F21 (category, direct).
Instructional note
Latent schizophrenic reaction
Source: F21 (category, direct).
Instructional note
Prepsychotic schizophrenia
Source: F21 (category, direct).
Instructional note
Prodromal schizophrenia
Source: F21 (category, direct).
Instructional note
Pseudoneurotic schizophrenia
Source: F21 (category, direct).
Instructional note
Pseudopsychopathic schizophrenia
Source: F21 (category, direct).
Instructional note
Schizotypal personality disorder
Source: F21 (category, direct).
Excludes2
Asperger's syndrome (F84.5)
Source: F21 (category, direct).
Excludes2
schizoid personality disorder (F60.1)
Source: F21 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does F21 mean in FY2027?
The official ICD-10-CM descriptor is Schizotypal disorder. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is F21 billable in FY2027?
The FY2027 order file marks F21 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does F21 map to an HCC?
Oct to Dec 2026, PY2027: CMS-HCC V28 HCC 153 (Personality Disorders; Anorexia/Bulimia Nervosa); CMS-HCC V24: Not used by CMS; ESRD HCC 60 (Personality Disorders); RxHCC HCC 133 (Anxiety and Other Psychiatric Disorders). Jan to Sep 2027, PY2028: CMS-HCC V28: Not published by CMS; CMS-HCC V24: Not published by CMS; ESRD: Not published by CMS; RxHCC: Not published by CMS. Oct to Dec 2026, BY2026: HHS-HCC: Pending. Jan to Sep 2027, BY2027: HHS-HCC: Not published by CMS. Base coefficients are reference values, not a member total.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition