ICD-10-CM Codes
C00-D49 Neoplasms
C7B-C7B Secondary neuroendocrine tumors
C7B- Secondary neuroendocrine tumors

2018 ICD-10-CM Diagnosis Code C7B.1

Secondary Merkel cell carcinoma

2016

2017

2018

Billable/Specific Code

C7B.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2018 edition of ICD-10-CM C7B.1 became effective on October 1, 2017.
This is the American ICD-10-CM version of C7B.1 - other international versions of ICD-10 C7B.1 may differ.

Applicable To

Merkel cell carcinoma nodal presentation
Merkel cell carcinoma visceral metastatic presentation

The following code(s) above C7B.1 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to C7B.1:

C00-D49
2018 ICD-10-CM Range C00-D49
Neoplasms
Note
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Neoplasms
C7B
ICD-10-CM Diagnosis Code C7B
Secondary neuroendocrine tumors
Use Additional
- code to identify any functional activity
Secondary neuroendocrine tumors

Approximate Synonyms

Merkel cell carcinoma metastatic to liver
Merkel cell carcinoma metastatic to lymph node
Merkel cell carcinoma metastatic to skin
Merkel cell carcinoma metastatic to unspecified site
Merkel cell carcinoma, metastatic

ICD-10-CM C7B.1 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

826 Myeloproliferative disorders or poorly differentiated neoplasms with major o.r. Procedure with mcc
827 Myeloproliferative disorders or poorly differentiated neoplasms with major o.r. Procedure with cc
828 Myeloproliferative disorders or poorly differentiated neoplasms with major o.r. Procedure without cc/mcc
829 Myeloproliferative disorders or poorly differentiated neoplasms with other procedure with cc/mcc
830 Myeloproliferative disorders or poorly differentiated neoplasms with other procedure without cc/mcc
843 Other myeloproliferative disorders or poorly differentiated neoplastic diagnoses with mcc
844 Other myeloproliferative disorders or poorly differentiated neoplastic diagnoses with cc
845 Other myeloproliferative disorders or poorly differentiated neoplastic diagnoses without cc/mcc

Convert C7B.1 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change

Code annotations containing back-references to C7B.1:

Type 1 Excludes: C79.2

ICD-10-CM Diagnosis Code C79.2
Secondary malignant neoplasm of skin
Type 1 Excludes
- secondary Merkel cell carcinoma (C7B.1)

Diagnosis Index entries containing back-references to C7B.1:

Carcinoma (malignant) - see also Neoplasm, by site, malignant
- Merkel cell C4A.9
  ICD-10-CM Diagnosis Code C4A.9
  Merkel cell carcinoma, unspecified
  2016 2017 2018 Billable/Specific Code
  Applicable To
  Merkel cell carcinoma of unspecified site
  Merkel cell carcinoma NOS
  - nodal presentation C7B.1
  - secondary C7B.1
  - visceral metastatic C7B.1
- secondary - see also Neoplasm, secondary, by site
  - Merkel cell C7B.1

ICD-10-CM Codes Adjacent To C7B.1

C7A.1 Malignant poorly differentiated neuroendocrine tumors

C7A.8 Other malignant neuroendocrine tumors

C7B Secondary neuroendocrine tumors

C7B.0 Secondary carcinoid tumors

C7B.00 …… unspecified site

C7B.01 …… of distant lymph nodes

C7B.02 …… of liver

C7B.03 …… of bone

C7B.04 …… of peritoneum

C7B.09 …… of other sites

C7B.1 Secondary Merkel cell carcinoma

C7B.8 Other secondary neuroendocrine tumors

C76 Malignant neoplasm of other and ill-defined sites

C76.0 Malignant neoplasm of head, face and neck

C76.1 Malignant neoplasm of thorax

C76.2 Malignant neoplasm of abdomen

C76.3 Malignant neoplasm of pelvis

C76.4 Malignant neoplasm of upper limb

C76.40 Malignant neoplasm of unspecified upper limb

C76.41 Malignant neoplasm of right upper limb

C76.42 Malignant neoplasm of left upper limb

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2018 ICD-10-CM Diagnosis Code C7B.1

Secondary Merkel cell carcinoma

Neoplasms

Secondary neuroendocrine tumors

Secondary malignant neoplasm of skin

Merkel cell carcinoma, unspecified