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MS-DRG 041 · MDC 01 · Surgical

MS-DRG 041: Peripheral, Cranial Nerve and Other Nervous System Procedures with CC or Peripheral Neurostimulator

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Data effective
Data currency: IPPS Table 5 FY2027 final rule (effective October 1, 2026); Definitions Manual v44 (effective October 1, 2026). Next CMS release: April 1, 2027 (v44.1 mid-year update), then the FY2028 final rule in August 2027.

Key facts for DRG 041

FY2027 relative weight
2.1790
Higher than 67% of all MS-DRGs
Change vs FY2026
-0.9%
FY2026 weight 2.1990
Geometric mean LOS
3.7 days
Arithmetic mean 4.8 days
MDC
01
Assignment of Diagnosis Codes
Severity level
with CC (complication or comorbidity)
Transfer policy
Post-acute transfer DRG
Special-pay DRG

TL;DR

MS-DRG 041 is a surgical group in MDC 01 (Assignment of Diagnosis Codes) at the middle severity level of its family. CMS assigns it a FY2027 relative weight of 2.1790 with a geometric mean length of stay of 3.7 days and an arithmetic mean of 4.8. Its weight moved down 0.9% from FY2026 (2.1990). That weight is higher than 67% of all surgical and medical MS-DRGs. CMS does not split this group by severity. The v44 Definitions Manual assigns it through 4891 operating room procedures codes and 570 peripheral neurostimulators codes.

What changed from FY2026 to FY2027

CMS recalibrates every MS-DRG weight annually from the prior year's MedPAR claims. For DRG 041 the FY2027 relative weight is 2.1790 against 2.1990 in FY2026, a fall of 0.91%.

FY2026 versus FY2027 payment factors for MS-DRG 041
MetricFY2026FY2027Change
Relative weight2.19902.1790-0.0200
Geometric mean LOS (days)3.83.7-0.1
Arithmetic mean LOS (days)4.84.8+0.0
Weights shown are the FY2027 final values after the 10% cap on year-over-year reductions where applicable.

CC and MCC family

DRG 041 stands alone: CMS does not split this base group by CC or MCC severity, so complication documentation does not move the assignment, although it still affects quality and risk-adjustment reporting.

Grouper logic (v44 Definitions Manual)

Operating Room Procedures: 4891 ICD-10 codes drive assignment to this group; the first 12 are shown.

Operating Room Procedures codes assigned to DRG 041 (sample)
ICD-10 codeDescription
008F0ZZDivision of Olfactory Nerve, Open Approach
008F3ZZDivision of Olfactory Nerve, Percutaneous Approach
008F4ZZDivision of Olfactory Nerve, Percutaneous Endoscopic Approach
008G0ZZDivision of Optic Nerve, Open Approach
008G3ZZDivision of Optic Nerve, Percutaneous Approach
008G4ZZDivision of Optic Nerve, Percutaneous Endoscopic Approach
008H0ZZDivision of Oculomotor Nerve, Open Approach
008H3ZZDivision of Oculomotor Nerve, Percutaneous Approach
008H4ZZDivision of Oculomotor Nerve, Percutaneous Endoscopic Approach
008J0ZZDivision of Trochlear Nerve, Open Approach
008J3ZZDivision of Trochlear Nerve, Percutaneous Approach
008J4ZZDivision of Trochlear Nerve, Percutaneous Endoscopic Approach

Peripheral Neurostimulators: 570 ICD-10 codes drive assignment to this group; the first 12 are shown.

Peripheral Neurostimulators codes assigned to DRG 041 (sample)
ICD-10 codeDescription
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60BZInsertion of Single Array Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60CZInsertion of Single Array Rechargeable Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60CZInsertion of Single Array Rechargeable Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
0JH60CZInsertion of Single Array Rechargeable Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach

Documentation and denial exposure

As a surgical DRG, assignment depends on a qualifying operating-room procedure being coded from the operative report; a missing or non-OR procedure code drops the stay into a medical DRG in MDC 01 with a lower weight. Because this family has no severity split, review risk concentrates on medical-necessity of the admission itself and on the two-midnight benchmark. Typical inpatient denial codes for this group: CARC 16 (claim lacks information needed to group the stay), CARC 50 (the admission or procedure is judged not medically necessary), CARC 97 (a service is bundled into the DRG payment).

How QuickIntell uses DRG 041 data

QuickCode groups inpatient encounters against the current v44 logic, flags CC and MCC candidates that lack supporting documentation, and shows the weight difference across the family before the claim drops. QuickScribe captures the attending's language that supports severity, and QuickRCM works DRG-validation denials with the grouper evidence attached.

Explore QuickCodeExplore QuickScribeBook a demo

Frequently asked questions — DRG 041

What is MS-DRG 041?

MS-DRG 041 is "Peripheral, Cranial Nerve and Other Nervous System Procedures with CC or Peripheral Neurostimulator", a surgical Medicare Severity Diagnosis-Related Group in MDC 01, Assignment of Diagnosis Codes. Medicare pays inpatient stays grouped here at the hospital's base rate multiplied by the DRG relative weight.

What is the FY2027 relative weight for DRG 041?

The FY2027 relative weight is 2.1790 (IPPS final rule Table 5, effective October 1, 2026). In FY2026 it was 2.1990, a change of -0.9%.

What is the average length of stay for DRG 041?

CMS reports a geometric mean length of stay of 3.7 days and an arithmetic mean of 4.8 days for FY2027. The geometric mean is used for transfer-payment calculations.

What documentation supports the severity level of DRG 041?

DRG 041 is reached when the stay carries a secondary diagnosis from the CMS Complication or Comorbidity list but none from the MCC list. Common CC captures include chronic kidney disease stage 3 and above, uncontrolled diabetes with manifestations, malnutrition of specified severity and heart failure of a stated type. Each must be documented by the treating clinician and show clinical relevance in the record; a condition listed only in the problem list without assessment is the most frequent reason a CC is removed on audit and the stay drops to the base DRG.

Which codes group to DRG 041?

The v44 Definitions Manual lists 4891 operating room procedures codes and 570 peripheral neurostimulators codes for this group. Examples from the operating room procedures list: 008F0ZZ (Division of Olfactory Nerve, Open Approach); 008F3ZZ (Division of Olfactory Nerve, Percutaneous Approach); 008F4ZZ (Division of Olfactory Nerve, Percutaneous Endoscopic Approach); 008G0ZZ (Division of Optic Nerve, Open Approach).

Is DRG 041 a post-acute transfer DRG?

Yes. CMS flags DRG 041 under the post-acute care transfer policy, so a discharge to a qualifying post-acute setting before the geometric mean length of stay is paid a per-diem amount rather than the full DRG payment. It is also a special-pay DRG.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-01. Verify against the primary file before billing or contracting decisions.

Disclaimer

This page is an operational reference compiled from the CMS IPPS FY2027 final rule (Table 5) and the v44 ICD-10 MS-DRG Definitions Manual. Relative weights are national factors; actual payment depends on each hospital's wage-adjusted base rate, add-ons, outliers and transfer adjustments. Nothing here is legal, clinical or billing advice; verify grouping against your encoder and the published CMS files.