2027 ICD-10-CM Diagnosis Code A07.2Cryptosporidiosis
ICD-10-CM Codes›A00–B99›A00-A09›A07
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 6
- Not Chronic
A07.2 is a billable ICD-10-CM diagnosis code for cryptosporidiosis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 371 through 373. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 67 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Intestinal infection; and Parasitic, other specified and unspecified infections.
For Medicare Advantage risk adjustment, A07.2 maps to CMS-HCC Category 6 (Opportunistic Infections) under the V28 model, adding a risk factor of about 0.381 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
A07.2 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Chronic intestinal cryptosporidiasis
- Coccidiosis co-occurrent with human immunodeficiency virus infection
- Colitis caused by Cryptosporidium
- Colitis caused by protozoan
- Cryptosporidial enteritis of intestine
- Cryptosporidial enteritis of small intestine
- Cryptosporidial gastroenteritis
- Cryptosporidiosis
- Disease caused by Cryptosporidiidae
- Gastritis caused by Cryptosporidium
- Infection by Cryptosporidium
- Infection by Cryptosporidium crotalis
- Infection by Cryptosporidium meleagridis
- Infection by Cryptosporidium muris
- Infection by Cryptosporidium nasorum
- Infection by Cryptosporidium parvum
- Infection caused by Cryptosporidium co-occurrent with human immunodeficiency virus infection
- Parasitic infection causing colitis
- Parasitic infection causing inflammation of small intestine
- Protozoal enteritis of small intestine
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to A07.2: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- diseases generally recognized as communicable or transmissible
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name A07.2, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming A07.2: they are not reported together with it, unless the two conditions are unrelated.
- B60 Other protozoal diseases, not elsewhere classifiedcryptosporidiosis (A07.2)
- A06 Amebiasisother protozoal intestinal diseases (A07.-) names A07.-, which includes this code
- Block B50-B64 Protozoal diseasesother protozoal intestinal diseases (A07.-) names A07.-, which includes this code
Excludes2 2
These codes carry an Excludes2 note naming A07.2: its condition is not part of those codes, and both may be reported when the patient has both.
- Block P35-P39 Infections specific to the perinatal period
- P37 Other congenital infectious and parasitic diseases
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Cryptosporidiosis A07.2
Gastroenteritis (acute) (chronic) (noninfectious) See Also: Enteritis; K52.9
Cryptosporidium A07.2
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Cryptosporidiosis
intestinal infection with organisms of the genus cryptosporidium. it occurs in both animals and humans. symptoms include severe diarrhea.
Patient EducationClinical
Cryptosporidiosis
Cryptosporidiosis is a contagious disease that causes watery diarrhea. It is caused by parasites called Cryptosporidium, or Crypto . These parasites live in soil, food, and water. They are found in every region of the United States and throughout the world.
The full article covers:
- What is cryptosporidiosis?
- How is cryptosporidiosis spread?
- Who is more likely to get cryptosporidiosis?
- What are the symptoms of cryptosporidiosis?
- How is cryptosporidiosis diagnosed?
- What are the treatments for cryptosporidiosis?
- Can cryptosporidiosis be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert A07.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About A07.2Overview
What is the ICD-10 code for cryptosporidiosis?
The ICD-10-CM code for cryptosporidiosis is A07.2 (sometimes written as A072). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is A07.2 (Other protozoal intestinal diseases) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report cryptosporidiosis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does A07.2 group to?
When cryptosporidiosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 372, 371, 373, with relative weights from 0.6945 to 1.7087 depending on complications. Higher weights mean higher Medicare reimbursement.
Is A07.2 a CC or MCC?
CMS lists A07.2 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 67 closely related codes in its exclusion list.
What is the ICD-9 equivalent of A07.2?
Under the General Equivalence Mappings, cryptosporidiosis converts to ICD-9-CM 007.4 (cryptosporidiosis). The mapping is a direct match.
What HCC is A07.2?
A07.2 (cryptosporidiosis) maps to CMS-HCC Category 6 (Opportunistic Infections), commonly written as HCC 6, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 6 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. In the Part D prescription drug model it maps to RxHCC 5.
Does A07.2 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, A07.2 adds a risk adjustment factor of about 0.381 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.381 to 0.833 depending on the payment segment). HCC 6 sits at the top of its hierarchy, so no other condition category supersedes it. See the full factor table on the HCC 6 category page.
