ICD-10-CM Clinical Concepts · FY 2026 109 Codes
Common ICD-10-CM Codes for Clinical Concepts for Internal Medicine ICD-10-CM
Clinical Concepts for Internal Medicine providers see a recurring set of conditions, and this reference collects the 109 ICD-10-CM codes they report most often, organized into 12 clinical concepts from abdominal pain onward. Billable codes carry the green check; entries with the amber note point at a category where a more specific code should be considered first. Every code links to its full code page for verification.
✓ Codes validated against the official CMS FY 2026 code setEffective Oct 1, 2025 – Sep 30, 2026
12
Concept Groups
109
Codes
105
Billable
FY 2026
Dataset
109 of 109 shown
Abdominal Pain 12 codes
- R10.0 Acute abdomen
- R10.10 Upper abdominal pain, unspecified
- R10.11 Right upper quadrant pain
- R10.12 Left upper quadrant pain
- R10.13 Epigastric pain
- R10.2 Pelvic and perineal pain Non-billable
- R10.30 Lower abdominal pain, unspecified
- R10.31 Right lower quadrant pain
- R10.32 Left lower quadrant pain
- R10.33 Periumbilical pain
- R10.84 Generalized abdominal pain
- R10.9 Unspecified abdominal pain specificity
Acute Respiratory Infections 13 codes
- J02.8 Acute pharyngitis due to other specified organisms
- J02.9 Acute pharyngitis, unspecified specificity
- J06.9 Acute upper respiratory infection, unspecified specificity
- J20.0 Acute bronchitis due to Mycoplasma pneumoniae
- J20.1 Acute bronchitis due to Hemophilus influenzae
- J20.2 Acute bronchitis due to streptococcus
- J20.3 Acute bronchitis due to coxsackievirus
- J20.4 Acute bronchitis due to parainfluenza virus
- J20.5 Acute bronchitis due to respiratory syncytial virus
- J20.6 Acute bronchitis due to rhinovirus
- J20.7 Acute bronchitis due to echovirus
- J20.8 Acute bronchitis due to other specified organisms
- J20.9 Acute bronchitis, unspecified specificity
Back and Neck Pain 5 codes
- M54.2 Cervicalgia
- M54.5 Low back pain Non-billable
- M54.6 Pain in thoracic spine
- M54.89 Other dorsalgia
- M54.9 Dorsalgia, unspecified specificity
Chest Pain 6 codes
- R07.1 Chest pain on breathing
- R07.2 Precordial pain
- R07.81 Pleurodynia
- R07.82 Intercostal pain
- R07.89 Other chest pain
- R07.9 Chest pain, unspecified specificity
Diabetes Mellitus w/o Complications Type 2 1 codes
- E11.9 Type 2 diabetes mellitus without complications
General Medical Examination 2 codes
- Z00.00 Encounter for general adult medical examination without abnormal findings
- Z00.01 Encounter for general adult medical examination with abnormal findings
Headache 1 codes
- R51 Headache Non-billable
Hypertension 1 codes
- I10 Essential (primary) hypertension
Other Forms Of Heart Disease 3 codes
- I48.0 Paroxysmal atrial fibrillation
- I48.2 Chronic atrial fibrillation Non-billable
- I48.91 Unspecified atrial fibrillation specificity
Pain in Joint 19 codes
- M25.50 Pain in unspecified joint specificity
- M25.511 Pain in right shoulder
- M25.512 Pain in left shoulder
- M25.519 Pain in unspecified shoulder specificity
- M25.521 Pain in right elbow
- M25.522 Pain in left elbow
- M25.529 Pain in unspecified elbow specificity
- M25.531 Pain in right wrist
- M25.532 Pain in left wrist
- M25.539 Pain in unspecified wrist specificity
- M25.551 Pain in right hip
- M25.552 Pain in left hip
- M25.559 Pain in unspecified hip specificity
- M25.561 Pain in right knee
- M25.562 Pain in left knee
- M25.569 Pain in unspecified knee specificity
- M25.571 Pain in right ankle and joints of right foot
- M25.572 Pain in left ankle and joints of left foot
- M25.579 Pain in unspecified ankle and joints of unspecified foot specificity
Pain in Limb 31 codes
- M79.601 Pain in right arm
- M79.602 Pain in left arm
- M79.603 Pain in arm, unspecified specificity
- M79.604 Pain in right leg
- M79.605 Pain in left leg
- M79.606 Pain in leg, unspecified specificity
- M79.609 Pain in unspecified limb
- M79.621 Pain in right upper arm
- M79.622 Pain in left upper arm
- M79.629 Pain in unspecified upper arm specificity
- M79.631 Pain in right forearm
- M79.632 Pain in left forearm
- M79.639 Pain in unspecified forearm specificity
- M79.641 Pain in right hand
- M79.642 Pain in left hand
- M79.643 Pain in unspecified hand specificity
- M79.644 Pain in right finger(s)
- M79.645 Pain in left finger(s)
- M79.646 Pain in unspecified finger(s) specificity
- M79.651 Pain in right thigh
- M79.652 Pain in left thigh
- M79.659 Pain in unspecified thigh specificity
- M79.661 Pain in right lower leg
- M79.662 Pain in left lower leg
- M79.669 Pain in unspecified lower leg specificity
- M79.671 Pain in right foot
- M79.672 Pain in left foot
- M79.673 Pain in unspecified foot specificity
- M79.674 Pain in right toe(s)
- M79.675 Pain in left toe(s)
- M79.676 Pain in unspecified toe(s) specificity
Urinary Tract Infection, Cystitis 15 codes
- N30.00 Acute cystitis without hematuria
- N30.01 Acute cystitis with hematuria
- N30.10 Interstitial cystitis (chronic) without hematuria
- N30.11 Interstitial cystitis (chronic) with hematuria
- N30.20 Other chronic cystitis without hematuria
- N30.21 Other chronic cystitis with hematuria
- N30.30 Trigonitis without hematuria
- N30.31 Trigonitis with hematuria
- N30.40 Irradiation cystitis without hematuria
- N30.41 Irradiation cystitis with hematuria
- N30.80 Other cystitis without hematuria
- N30.81 Other cystitis with hematuria
- N30.90 Cystitis, unspecified without hematuria
- N30.91 Cystitis, unspecified with hematuria
- N39.0 Urinary tract infection, site not specified specificity
Entries marked specificity point at a category: codes with a greater degree of specificity should be considered first.
Related References
Clinical Concepts for CardiologyClinical Concepts for Family PracticeClinical Concepts for OB/GYNClinical Concepts for OrthopedicsClinical Concepts for PediatricsAll Clinical ConceptsICD-10-CM Code LookupICD-10-CM Codes List
Source: CMS ICD-10 Clinical Concepts guides, with every code validated against the official FY 2026 ICD-10-CM code set, effective October 1, 2025 through September 30, 2026.
