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HCPCS Q0112 · Level II · Q code

Q0112: All potassium hydroxide (koh) preparations, HCPCS Level II Q code

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: HCPCS Level II file: October 2026 (effective October 1, 2026); PFS relative value file: RVU26D, released August 26, 2026 (effective October 1, 2026); Clinical Laboratory Fee Schedule: 26CLABQ4 (CY2026 Q4) (effective October 1, 2026); NCCI MUE tables: 2026 Q4 (effective October 1, 2026); NCCI PTP edits: v323r0 (2026 Q4) (effective October 1, 2026); OPPS Addendum B: October 2026 (effective October 1, 2026). Next CMS release: January 1, 2027 (quarterly update) for the HCPCS Level II file and Clinical Laboratory Fee Schedule and NCCI MUE tables and NCCI PTP edits and OPPS Addendum B; RVU27A with the CY2027 PFS final rule, effective January 1, 2027 for the PFS relative value file.

Key facts for Q0112

Medicare payment
$5.83
CLFS national limitation amount
Coverage code
C
carrier judgment, so the Medicare contractor decides coverage
Practitioner MUE
3
MAI 3
OPPS status
SI A
Services not paid under OPPS; paid under fee schedule or other payment system
NCCI PTP pairs
0
practitioner file
LCDs and articles
0 / 0

TL;DR

CMS describes HCPCS Q0112, added in 1994, as "All potassium hydroxide (koh) preparations". The 2026 Q4 clinical laboratory fee schedule pays Q0112 $5.83 (national limitation amount). MUE limits for Q0112: practitioner 3 (MAI 3, Clinical: Data); hospital outpatient 3 (MAI 3, Clinical: Data); DME supplier 0 (MAI 3, CMS Policy). Q0112 appears in no active LCD or billing and coding article, so coverage follows HCPCS coverage code C (carrier judgment, so the Medicare contractor decides coverage) and any NCD. OPPS status indicator A: Services not paid under OPPS; paid under fee schedule or other payment system. HCPCS record: BETOS T1H (lab tests - other (non-Medicare fee schedule)); pricing indicator 21; type of service 5 (diagnostic laboratory). Nearby codes: Q0111, Q0092, Q0091, Q0163.

Q0112 descriptor and code status

The October 2026 HCPCS Level II file describes Q0112 as “All potassium hydroxide (koh) preparations”. It sits in the Q section (temporary codes), listed with the other Q codes for services and supplies (non-drug).

HCPCS file attributes of Q0112
FieldValue
Short descriptorPotassium hydroxide preps
Added to HCPCS1994-01-01
Last actionN (no maintenance), effective 1994-01-01
Coverage codeC: carrier judgment, so the Medicare contractor decides coverage
Pricing indicator21: clinical lab fee schedule, subject to the national limitation amount
BETOS categoryT1H: lab tests - other (non-Medicare fee schedule)
Type of service5: diagnostic laboratory

Medicare payment for Q0112

The 2026 Q4 clinical laboratory fee schedule pays Q0112 $5.83 (national limitation amount). The amounts below are national figures from the October 2026 CMS files; the contractor applies the locality, rural or state adjustment and the beneficiary's cost sharing.

Physician fee schedule (RVU26D)

Status X: statutory exclusion: not a physician service under the fee schedule. Global period XXX (global surgery concept does not apply); PC/TC indicator 9 (professional/technical concept does not apply).

Clinical Laboratory Fee Schedule (26CLABQ4)

Q0112 is paid at $5.83 (national limitation amount). Laboratory fee schedule payments carry no beneficiary coinsurance or deductible.

Hospital outpatient (OPPS Addendum B)

Status indicator A (Services not paid under OPPS; paid under fee schedule or other payment system), with no separate OPPS payment rate.

Medically Unlikely Edits for Q0112

MUE limits for Q0112: practitioner 3 (MAI 3, Clinical: Data); hospital outpatient 3 (MAI 3, Clinical: Data); DME supplier 0 (MAI 3, CMS Policy). The practitioner MUE is a date-of-service clinical edit: units above the limit deny but can be paid on appeal with documentation.

MUE values for Q0112 by setting
SettingMUE (units/DOS)MAICMS rationale
Practitioner services33 Date of Service Edit: ClinicalClinical: Data
Facility outpatient hospital33 Date of Service Edit: ClinicalClinical: Data
DME supplier03 Date of Service Edit: ClinicalCMS Policy

The MUE lookup for Q0112 shows every setting next to any other code on the same claim.

NCCI edits and add-on rules

No active practitioner PTP pair lists Q0112 in v323r0.

Q0112 is neither an add-on code nor a designated primary code in the 2026 Q4 NCCI add-on edit file.

Pair counts show exposure, not the answer for one claim. Check Q0112 against a second code to see whether the pair bundles and whether a modifier can separate the services.

Medicare coverage policies for Q0112

No current LCD or billing and coding article lists Q0112. The HCPCS coverage code C means carrier judgment, so the Medicare contractor decides coverage, and any National Coverage Determination for the service still applies.

Denials to expect on Q0112

CARC 50 · N115

the service is not reasonable and necessary for the diagnosis on the claim

CARC 151 · N362

units of Q0112 exceed the practitioner MUE of 3 per date of service

CARC 4

the modifier reported is inconsistent with the code

CARC 16

the claim lacks information needed to adjudicate the line, such as an order, NPI or required modifier

Where QuickIntell fits for Q0112 claims

QuickCode supports qualified coder review of units, modifiers and NCCI pairs for Q0112 before the claim leaves, and QuickRCM carries claim readiness and the denial follow-up when an edit or coverage policy is missed.

See QuickCode for coder reviewSee QuickRCM for denial follow-upBook a meeting

Frequently asked questions: HCPCS Q0112

What does HCPCS code Q0112 describe?

"All potassium hydroxide (koh) preparations" (short descriptor "Potassium hydroxide preps"), in the Q section (temporary codes). Added 1994-01-01.

Is Q0112 a CPT code?

No: CMS maintains Q0112 in HCPCS Level II, while the AMA maintains CPT. It goes in the same procedure-code field.

What does Medicare pay for Q0112?

The 2026 Q4 clinical laboratory fee schedule pays Q0112 $5.83 (national limitation amount).

How many units of Q0112 can be billed per day?

MUE limits for Q0112: practitioner 3 (MAI 3, Clinical: Data); hospital outpatient 3 (MAI 3, Clinical: Data); DME supplier 0 (MAI 3, CMS Policy). For the practitioner MUE (MAI 3), units above 3 deny for the day but can be paid on appeal with documentation; denials arrive as CARC 151.

Does Medicare cover Q0112?

Q0112 appears in no active LCD or billing and coding article, so coverage follows HCPCS coverage code C (carrier judgment, so the Medicare contractor decides coverage) and any NCD.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

This page is an operational reference compiled from CMS publications: the HCPCS Level II file, the physician, DMEPOS and clinical laboratory fee schedules, OPPS and ASC addenda, NCCI MUE, PTP and add-on edit tables and the Medicare Coverage Database. Amounts are Medicare national figures before locality and state adjustment; Medicaid and commercial payers set their own. CPT codes are shown as numbers only; CPT descriptors are copyright AMA. Nothing here is legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.