2027 ICD-10-CM Diagnosis Code M89.662Osteopathy after poliomyelitis, left lower leg
ICD-10-CM Codes›M00–M99›M86-M90›M89
- Billable — Valid for Submission
- Risk Adjusts — HCC 92
- Chronic Condition
M89.662 is a billable ICD-10-CM diagnosis code for osteopathy after poliomyelitis, left lower leg. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 564 through 566. Coders also document this condition as osteopathy of bilateral fibulas following poliomyelitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.
For Medicare Advantage risk adjustment, M89.662 maps to CMS-HCC Category 92 (Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis) under the V28 model, adding a risk factor of about 0.479 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
M89.662 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Osteopathy of bilateral fibulas following poliomyelitis
- Osteopathy of bilateral tibias following poliomyelitis
- Osteopathy of fibula following poliomyelitis
- Osteopathy of left fibula following poliomyelitis
- Osteopathy of left tibia following poliomyelitis
- Osteopathy of right fibula following poliomyelitis
- Osteopathy of right tibia following poliomyelitis
- Osteopathy of tibia following poliomyelitis
- Poliomyelitis osteopathy of the lower leg
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M89.662: its own notes plus those printed at M89.6, block M86-M90, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- postprocedural osteopathies (M96.-)
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.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- 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)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Notes
General instructions on how these codes are used.
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Bone Diseases
Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M89.662 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M89.662Overview
What is the ICD-10 code for osteopathy after poliomyelitis, left lower leg?
The ICD-10-CM code for osteopathy after poliomyelitis, left lower leg is M89.662 (sometimes written as M89662). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M89.662 (Osteopathy after poliomyelitis, lower leg) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report osteopathy after poliomyelitis, left lower leg on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M89.662 group to?
When osteopathy after poliomyelitis, left lower leg is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 566, 565, with relative weights from 0.7374 to 1.4909 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M89.662 be reported with G14?
Not as a rule. The Excludes1 note at M89.6, which applies to M89.662, lists "postpolio syndrome (G14)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
Does M89.662 need an additional code?
When the condition applies, yes. The Use Additional Code note at M89.6, which applies to M89.662, reads: code (B91) to identify previous poliomyelitis. The additional code is reported after M89.662.
What HCC is M89.662?
M89.662 (osteopathy after poliomyelitis, left lower leg) maps to CMS-HCC Category 92 (Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis), commonly written as HCC 92, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 39 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. It does not map to any RxHCC in the Part D prescription drug model.
Does M89.662 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, M89.662 adds a risk adjustment factor of about 0.479 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.471 to 0.632 depending on the payment segment). HCC 92 sits at the top of its hierarchy, so no other condition category supersedes it. See the full factor table on the HCC 92 category page.
