CodeMap® 
150 North Wacker Drive
Suite 2360
Chicago, IL 60606
847-381-5465 Phone
847-381-4606 Fax
customerservice@codemap.com
      


User Information

Create New Account

Lost Password

Username:
Password:


Quick Links

LCDs and LCAs
by Contractor

PLA Codes

Laboratory Fee Schedule

2025
2024
QW Tests

Physician Fee Schedule

2025
2024

OPPS Fee Schedule

2025-April
2025-January

ASC Fee Schedule

2025-April
2025-January

APC Codes

2025-April
2025-January

DRG Codes

2025
2024

ASP Drug Pricing Files

2025-April
2025-January


CMS Transmittals



.

ICD-10 Code or Description Search:

C4A.21 Quick jump to specific ICD-10 (CM) Code: C4A.30


See Category: Neoplasms

See Header: Merkel cell carcinoma of ear and external auricular canal

ICD-10 (CM) Code and Descriptor

C4A.22 Merkel cell carcinoma of left ear and external auricular canal

C4A22 utilizaton on OPPS claims.*

Primary
ICD10 Code
ICD10
Position 2
ICD10
Position 3
ICD10
Position 4
ICD10
Position 5
ICD10
Position 6
ICD10
Position 7
ICD10
Position 9
ICD10
Position 12
50.57% 38.09% 5.67% 2.59% 0.81% 0.97% 0.32% 0.65% 0.32%

* Medicare Part A utilization data is derived from the 100% 2023 Outpatient (Fee-for-Service) Standard Analytical File.

Commonly Associated Procedure Codes for C4A.22*:

CPT
Description Number of Claims Sum Performed
G0463
HOSPITAL OUTPT CLINIC VISIT 82 82
77386
NTSTY MODUL RAD TX DLVR CPLX 75 75
99211
OFF/OP EST MAY X REQ PHY/QHP 66 66
36415
COLL VENOUS BLD VENIPUNCTURE 63 63
80053
COMPREHEN METABOLIC PANEL 63 63
85025
COMPLETE CBC W/AUTO DIFF WBC 63 63
96413
CHEMO IV INFUSION 1 HR 29 29
84443
ASSAY THYROID STIM HORMONE 25 25
J9023
INJECTION, AVELUMAB, 10 MG 23 1,840
84480
ASSAY TRIIODOTHYRONINE (T3) 23 23
A9552
F18 FDG 22 22
84436
ASSAY OF TOTAL THYROXINE 22 22
77336
RADIATION PHYSICS CONSULT 20 20
88305
TISSUE EXAM BY PATHOLOGIST 19 38
78816
PET IMAGE W/CT FULL BODY 17 17
Q9967
LOCM 300-399MG/ML IODINE,1ML 16 1,948
88342
IMHCHEM/IMCYTCHM 1ST ANTB 15 20
G1004
CDSM NDSC 15 17
J2704
INJ, PROPOFOL, 10 MG 13 481
85027
COMPLETE CBC AUTOMATED 13 13

* Derived from 100% 2021 Outpatient (Fee-for-Service) Standard Analytical File.



C4A.22 related to the following DRG Codes:

595-596






CodeMap¨ is a Registered Trademark of Wheaton Partners, LLC.