D72.821 — Monocytosis (symptomatic)
Is D72.821 billable?
Yes — D72.821 is billable for FY2027. D72.821 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. D72.821 may be submitted for encounters from October 1, 2026 through September 30, 2027.
D72.821 at a glance
| Code | D72.821 |
|---|---|
| Description | Monocytosis (symptomatic) |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does D72.821 group to?
D72.821 sits in MDC 16 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 814Reticuloendothelial and Immunity Disorders with MCCmedical
- 815Reticuloendothelial and Immunity Disorders with CCmedical
- 816Reticuloendothelial and Immunity Disorders without CC/MCCmedical
How is D72.821 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to D72.821. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Monocytosis (symptomatic)
Excludes1 — never code together
The conditions below can never be reported together with D72.821 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- infectious mononucleosis (B27.-)
Excludes1 — never code together — inherited from D72
The conditions below can never be reported together with D72.821 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from D72.8
The conditions below can never be reported together with D72.821 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- leukemia (C91-C95)
Excludes1 — never code together — inherited from D72.82
The conditions below can never be reported together with D72.821 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- eosinophilia (D72.1)
Excludes2 — not included here — inherited from Chapter 3
The conditions below are not part of D72.821, but a patient may have both at the same time. When documentation supports it, D72.821 and the excluded code may both be reported.
- autoimmune disease (systemic) NOS (M35.9)
- certain conditions originating in the perinatal period (P00-P96)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- human immunodeficiency virus [HIV] disease (B20)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from D72
The conditions below are not part of D72.821, but a patient may have both at the same time. When documentation supports it, D72.821 and the excluded code may both be reported.
- neutropenia (D70)
How long has D72.821 existed?
D72.821 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.