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Code Workspace Edition 2026 v2026.04

Code Workspace

Search 100K+ codes, check NCCI bundling, calculate Medicare fees. Built for the working coder.

CPT

11,025

ICD-10

98,186

NCCI

4.5M

⌘K

Code of the day May 31, 2026

99285

Emergency dept visit hi mdm

Work RVU

4.00

Est. fee

$200

Global

XXX

Top-billed CPTs

By national Medicare claim frequency

Updated daily

99213 Office o/p est low 20 min 99214 Office o/p est mod 30 min 99215 Office o/p est hi 40 min 99203 Office o/p new low 30 min 99204 Office o/p new mod 45 min 99205 Office o/p new hi 60 min 99284 Emergency dept visit mod mdm 99285 Emergency dept visit hi mdm 99291 Critical care first hour 93000 Electrocardiogram complete 93010 Electrocardiogram report 71046 X-ray exam chest 2 views 73030 X-ray exam of shoulder 77067 Scr mammo bi incl cad 80053 Comprehen metabolic panel 85025 Complete cbc w/auto diff wbc 99232 Sbsq hosp ip/obs moderate 35 99396 Prev visit est age 40-64 99397 Per pm reeval est pat 65+ yr 99497 Advncd care plan 30 min 36415 Coll venous bld venipuncture 90837 Psytx w pt 60 minutes 90834 Psytx w pt 45 minutes 99483 Assmt & care pln pt cog imp 99490 Chrnc care mgmt staff 1st 20 11042 Dbrdmt subq tis 1st 20sqcm/< 45378 Diagnostic colonoscopy 97110 Therapeutic exercises 97140 Manual therapy 1/> regions

Top denial codes by claim impact

Each link opens the appeal-template page

CO-45 Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement. Usage: This adjustment amount cannot equal the total service or claim charge amount; and must not duplicate provider adjustment amounts (payments and contractual reductions) that have resulted from prior payer(s) adjudication. (Use only with Group Codes PR or CO depending upon liability)

CO-97 The benefit for this service is included in the payment/allowance for another service/procedure that has already been adjudicated. Usage: Refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment Information REF), if present

CO-16 Claim/service lacks information or has submission/billing error(s). Usage: Do not use this code for claims attachment(s)/other documentation. At least one Remark Code must be provided (may be comprised of either the NCPDP Reject Reason Code, or Remittance Advice Remark Code that is not an ALERT.) Refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment Information REF), if present

CO-50 These are non-covered services because this is not deemed a 'medical necessity' by the payer. Usage: Refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment Information REF), if present

CO-109 Claim/service not covered by this payer/contractor. You must send the claim/service to the correct payer/contractor

CO-151 Payment adjusted because the payer deems the information submitted does not support this many/frequency of services

PR-204 This service/equipment/drug is not covered under the patient's current benefit plan

PR-1 Deductible Amount

PR-3 Co-payment Amount

CO-22 This care may be covered by another payer per coordination of benefits

CO-27 Expenses incurred after coverage terminated

CO-29 The time limit for filing has expired

High-stakes modifiers

Modifiers OIG audits hardest. Click for usage rules.

Mod 25 Significant, separately identi... Mod 59 Distinct procedural service —... Mod 50 Bilateral procedure — performe... Mod 51 Multiple procedures — when mul... Mod 24 Unrelated E/M service by the s... Mod 57 Decision for surgery — E/M ser... Mod 26 Professional component — physi... Mod TC Technical component — equipmen... Mod GA Waiver of liability statement... Mod GZ Item or service expected to be... Mod KX Requirements specified in the... Mod LT Left side (used to identify pr... Mod RT Right side (used to identify p... Mod 76 Repeat procedure or service by... Mod 77 Repeat procedure by another ph... Mod 91 Repeat clinical diagnostic lab... Mod 95 Synchronous telemedicine servi... Mod XS Separate structure — a service... Mod XU Unusual non-overlapping servic...

CPT Procedures

Medicare fees, RVUs, NCCI bundling, modifier compatibility per code

ICD-10-CM Diagnoses

Excludes/Includes/HCC mapping, hierarchy, LCD coverage flags

HCPCS Level II

J-codes, DME, supplies, ambulance, dental D-codes, NDC linkage

CPT Modifiers

Usage rules, audit triggers, payer variations, NCCI bypass discipline

Denial Codes

CARC + RARC with curated root cause, appeal templates, prevention

MS-DRG Inpatient

CC and MCC capture, geometric mean LOS, IPPS payment

APC Outpatient

OPPS payment, status indicators, packaging flags

NDC Drug Database

FDA NDC linked to HCPCS J-codes, package sizes, dosage forms

Browse ICD-10 by chapter

22 chapters covering all 98K diagnosis codes

A00-B99 Certain infectious and parasitic diseases 1,068 C00-D49 Neoplasms 1,727 D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism 323 E00-E89 Endocrine, nutritional and metabolic diseases 711 F01-F99 Mental, Behavioral and Neurodevelopmental disorders 871 G00-G99 Diseases of the nervous system 700 H00-H59 Diseases of the eye and adnexa 2,427 H60-H95 Diseases of the ear and mastoid process 653 I00-I99 Diseases of the circulatory system 1,427 J00-J99 Diseases of the respiratory system 360 K00-K95 Diseases of the digestive system 857 L00-L99 Diseases of the skin and subcutaneous tissue 1,000 M00-M99 Diseases of the musculoskeletal system and connective tissue 5,091 N00-N99 Diseases of the genitourinary system 836 O00-O9A Pregnancy, childbirth and the puerperium 1,205 P00-P96 Certain conditions originating in the perinatal period 463 Q00-QA0 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders 894 R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified 678 S00-T88 Injury, poisoning and certain other consequences of external causes 214 U00-U85 Codes for special purposes 3 V00-Y99 External causes of morbidity 495 Z00-Z99 Factors influencing health status and contact with health services 1,411

Tool

NCCI Bundle Checker

Paste two CPT codes. Get the bundling verdict from CMS NCCI in real time.

Code A

+

Code B

Independent Bypassable Absolute bundle

NCCI rationale:

Try: · Source: CMS NCCI 4.5M edits

Tool

Medicare Fee Calculator

Estimate the 2026 Medicare allowable for any CPT. National conversion factor 33.4009.

CPT Code

Setting

Try: · · Source: CMS PFS PPRRVU 2026

Shortcuts

Keyboard reference

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2026 Code Year

What changed for January 1, 2026

Annual updates from CMS, AMA, CDC. Verified as of May 31, 2026.

288

New CPT codes

AMA 2026 release. Heavy in surgery, lab, Category III experimental.

487

New ICD-10-CM codes

CDC FY2026 release. Most additions in mental health, infectious disease.

23

CARC code revisions

X12 March 2026 release. Verify your scrubber rule packs are current.

Major themes

1 Telehealth E/M codes 99441-99443 retired. Use audio-only modifier 93 with the standard E/M code instead.
2 CMS-HCC v28 fully phased in for Medicare Advantage RAF score calculations. Documentation requirements tightened.
3 New cardiology imaging codes (CT angiography family expanded). Verify NCCI bundling on your scrubber.
4 Conversion factor reduced 2.83% to 33.4009. Practice budgets need to reflect this on E/M-heavy specialties.

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