E20.1 ICD-10-CM Code: Pseudohypoparathyroidism
E20.1 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC coding software
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FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Disorders of other endocrine glands (E20-E35)
E20.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePseudohypoparathyroidism
A genetic disorder where the body's tissues do not respond properly to parathyroid hormone, resulting in low calcium and high phosphate levels despite normal or elevated hormone levels.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for E20.1. Check the code and parent instructions in the Code Book.
Excludes 2
OfficialNo Excludes 2 notes are included in this display for E20.1. Check the code and parent instructions in the Code Book.
Related Codes
Includes
OfficialNo Includes notes are included in this display for E20.1. Check the code and parent instructions in the Code Book.
Excludes 1
Official- transitory endocrine and metabolic disorders specific to newborn (P70-P74)Inherited from E00-E89, E20-E35, E20
- galactorrhea (N64.3)Inherited from E00-E89, E20-E35, E20
- gynecomastia (N62)Inherited from E00-E89, E20-E35, E20
- Di George's syndrome (D82.1)Inherited from E00-E89, E20-E35, E20
- postprocedural hypoparathyroidism (E89.2)Inherited from E00-E89, E20-E35, E20
- tetany NOS (R29.0)Inherited from E00-E89, E20-E35, E20
- transitory neonatal hypoparathyroidism (P71.4)Inherited from E00-E89, E20-E35, E20
Code First
OfficialNo Code First sequencing instructions are included in this display for E20.1. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for E20.1. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for E20.1. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is E20.1 an HCC code?
No. E20.1 is a billable ICD-10-CM code with no mapping under the current CMS-HCC V28 community payment model, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- E20.1
- Description
- Pseudohypoparathyroidism
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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What This Code Means
E20.1 is the ICD-10-CM diagnosis code for pseudohypoparathyroidism. A genetic disorder where the body's tissues do not respond properly to parathyroid hormone, resulting in low calcium and high phosphate levels despite normal or elevated hormone levels. E20.1 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering disorders of other endocrine glands (e20-e35).
E20.1 is a billable ICD-10-CM code, but no current CMS-HCC V28 community payment mapping is shown, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
This is a genetic condition; document family history when available to support the diagnosis.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for E20.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is a genetic condition; document family history when available to support the diagnosis
- •Distinguish from true hypoparathyroidism by noting that PTH levels are normal or elevated, not low