ICD-10 · PDGM grouping

B25-B34 — Other viral diseases

Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.1.26.

OASIS-E2 v1.00.0 · ingested 2026-04-26

Codes in range

No clinical group

A period cannot be grouped from these.

Barred as primary

CMS rejects these in the primary position.

Where these codes group

42 of the 55 codes in B25-B34 group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases, but the range is not uniform — it spreads across 2 clinical groups. A further 2 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.

Every code in B25-B34

Descriptions are CMS’s own, abbreviated as CMS abbreviates them.

Code	Description	Clinical group	Primary position
B250	Cytomegaloviral pneumonitis	K	Accepted
B251	Cytomegaloviral hepatitis	K	Accepted
B252	Cytomegaloviral pancreatitis	K	Accepted
B258	Other cytomegaloviral diseases	K	Accepted
B259	Cytomegaloviral disease, unspecified	K	Accepted
B260	Mumps orchitis	K	Accepted
B261	Mumps meningitis	B	Accepted
B262	Mumps encephalitis	B	Accepted
B263	Mumps pancreatitis	K	Accepted
B2681	Mumps hepatitis	K	Accepted
B2682	Mumps myocarditis	K	Accepted
B2683	Mumps nephritis	K	Accepted
B2684	Mumps polyneuropathy	B	Accepted
B2685	Mumps arthritis	K	Accepted
B2689	Other mumps complications	K	Accepted
B269	Mumps without complication	K	Accepted
B2700	Gammaherpesviral mononucleosis without complication	K	Accepted
B2701	Gammaherpesviral mononucleosis with polyneuropathy	B	Accepted
B2702	Gammaherpesviral mononucleosis with meningitis	B	Accepted
B2709	Gammaherpesviral mononucleosis with other complications	K	Accepted
B2710	Cytomegaloviral mononucleosis without complications	K	Accepted
B2711	Cytomegaloviral mononucleosis with polyneuropathy	B	Accepted
B2712	Cytomegaloviral mononucleosis with meningitis	B	Accepted
B2719	Cytomegaloviral mononucleosis with other complication	K	Accepted
B2780	Other infectious mononucleosis without complication	K	Accepted
B2781	Other infectious mononucleosis with polyneuropathy	B	Accepted
B2782	Other infectious mononucleosis with meningitis	B	Accepted
B2789	Other infectious mononucleosis with other complication	K	Accepted
B2790	Infectious mononucleosis, unspecified without complication	K	Accepted
B2791	Infectious mononucleosis, unspecified with polyneuropathy	B	Accepted
B2792	Infectious mononucleosis, unspecified with meningitis	B	Accepted
B2799	Infectious mononucleosis, unsp with other complication	K	Accepted
B300	Keratoconjunctivitis due to adenovirus	K	Accepted
B301	Conjunctivitis due to adenovirus	K	Accepted
B302	Viral pharyngoconjunctivitis	K	Accepted
B303	Acute epidemic hemorrhagic conjunctivitis (enteroviral)	K	Accepted
B308	Other viral conjunctivitis	K	Accepted
B309	Viral conjunctivitis, unspecified	K	Accepted
B330	Epidemic myalgia	K	Accepted
B331	Ross River disease	K	Accepted
B3320	Viral carditis, unspecified	K	Accepted
B3321	Viral endocarditis	K	Accepted
B3322	Viral myocarditis	K	Accepted
B3323	Viral pericarditis	K	Accepted
B3324	Viral cardiomyopathy	K	Accepted
B333	Retrovirus infections, not elsewhere classified	K	Accepted
B334	Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS]	K	Accepted
B338	Other specified viral diseases	K	Accepted
B340	Adenovirus infection, unspecified	K	Accepted
B341	Enterovirus infection, unspecified	K	Accepted
B342	Coronavirus infection, unspecified	K	Accepted
B343	Parvovirus infection, unspecified	K	Accepted
B344	Papovavirus infection, unspecified	K	Accepted
B348	Other viral infections of unspecified site	None	Cannot group
B349	Viral infection, unspecified	None	Cannot group

Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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B25-B34 — Other viral diseases

Where these codes group

Every code in B25-B34

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