2027 ICD-10-CM Diagnosis Code S33.110DSubluxation of L1/L2 lumbar vertebra, subsequent encounter

ICD-10-CM Codes›S00–T88›S30-S39›S33

ICD-10-CM S33.110D
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S33.110D is a billable ICD-10-CM diagnosis code for subluxation of L1/L2 lumbar vertebra, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Dislocations, subsequent encounter.

Code Identity

ICD-10-CM Code
S33.110D
Billable Status
Yes — Valid for Submission
Code Describes
Subluxation of L1/L2 lumbar vertebra, subsequent encounter
Short Description
Subluxation of L1/L2 lumbar vertebra, subsequent encounter
Same as the full description in the CMS dataset.
Parent Code
S33.110
Subluxation of L1/L2 lumbar vertebra

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS30-S39Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
CategoryS33Dislocation and sprain of joints and ligaments of lumbar spine and pelvis
This CodeS33.110DSubluxation of L1/L2 lumbar vertebra, subsequent encounter

Present on Admission (POA)Billing

S33.110D is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals (S30-S39).

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Dislocation and sprain of joints and ligaments of lumbar spine and pelvis (S33). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S33.110D: its own notes plus those printed at S33.1, S33, block S30-S39, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From S33 Dislocation and sprain of joints and ligaments of lumbar spine and pelvis applies to 57 codes
  • avulsion of joint or ligament of lumbar spine and pelvis
  • laceration of cartilage, joint or ligament of lumbar spine and pelvis
  • sprain of cartilage, joint or ligament of lumbar spine and pelvis
  • traumatic hemarthrosis of joint or ligament of lumbar spine and pelvis
  • traumatic rupture of joint or ligament of lumbar spine and pelvis
  • traumatic subluxation of joint or ligament of lumbar spine and pelvis
  • traumatic tear of joint or ligament of lumbar spine and pelvis
From Block S30-S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals applies to 2,679 codes
  • injuries to the abdominal wall
  • injuries to the anus
  • injuries to the buttock
  • injuries to the external genitalia
  • injuries to the flank
  • injuries to the groin

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From S33 Dislocation and sprain of joints and ligaments of lumbar spine and pelvis applies to 57 codes
  • nontraumatic rupture or displacement of lumbar intervertebral disc NOS (M51.-)
  • obstetric damage to pelvic joints and ligaments (O71.6)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From S33.1 Subluxation and dislocation of lumbar vertebra applies to 30 codes
  • fracture of lumbar vertebrae (S32.0-)
From S33 Dislocation and sprain of joints and ligaments of lumbar spine and pelvis applies to 57 codes
  • dislocation and sprain of joints and ligaments of hip (S73.-)
  • strain of muscle of lower back and pelvis (S39.01-)
From Block S30-S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals applies to 2,679 codes
  • burns and corrosions (T20-T32)
  • effects of foreign body in anus and rectum (T18.5)
  • effects of foreign body in genitourinary tract (T19.-)
  • effects of foreign body in stomach, small intestine and colon (T18.2-T18.4)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From S33.1 Subluxation and dislocation of lumbar vertebra applies to 30 codes
From S33 Dislocation and sprain of joints and ligaments of lumbar spine and pelvis applies to 57 codes
  • any associated open wound

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From S33 Dislocation and sprain of joints and ligaments of lumbar spine and pelvis applies to 57 codes
  • The appropriate 7th character is to be added to each code from category S33
Values for category S33 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter this code
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name S33.110D, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming S33.110D: they are not reported together with it, unless the two conditions are unrelated.

  • M43.1 Spondylolisthesis
    acute traumatic of lumbosacral region (S33.1) names S33.1, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming S33.110D: its condition is not part of those codes, and both may be reported when the patient has both.

  • S39 Other and unspecified injuries of abdomen, lower back, pelvis and external genitals
    sprain of joints and ligaments of lumbar spine and pelvis (S33.-) names S33.-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ044
Dislocations, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Dislocations

Dislocations are joint injuries that force the ends of your bones out of position. The cause is often a fall or a blow, sometimes from playing a contact sport. You can dislocate your ankles, knees, shoulders, hips, elbows and jaw. You can also dislocate your finger and toe joints.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S33.110D to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V58.89 Other specfied aftercare
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S33.110DOverview

What is the ICD-10 code for subluxation of L1/L2 lumbar vertebra, subsequent encounter?

The ICD-10-CM code for subluxation of L1/L2 lumbar vertebra, subsequent encounter is S33.110D (sometimes written as S33110D). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is S33.110D (Subluxation of L1/L2 lumbar vertebra) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report subluxation of L1/L2 lumbar vertebra, subsequent encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character D in S33.110D mean?

The final character D marks a subsequent encounter: use it for routine care while the subluxation of L1/L2 lumbar vertebra is healing, after active treatment has ended.

What MS-DRG does S33.110D group to?

When subluxation of L1/L2 lumbar vertebra, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 950, 949, with relative weights from 0.7661 to 1.1231 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S33.110D exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for subluxation of L1/L2 lumbar vertebra, subsequent encounter on inpatient claims. The code appears in the Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals (S30-S39) range of the CMS exempt list.