2024 ICD-10-CM Diagnosis Code T50.8X6A

Underdosing of diagnostic agents, initial encounter

ICD-10-CM Code:
T50.8X6A
ICD-10 Code for:
Underdosing of diagnostic agents, initial encounter
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
      (T36-T50)
      • Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances
        (T50)

T50.8X6A is a billable diagnosis code used to specify a medical diagnosis of underdosing of diagnostic agents, initial encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

This code describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.

T50.8X6A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like underdosing of diagnostic agents. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.

Clinical Classification

Clinical Information

  • Acetrizoic Acid

    an iodinated radiographic contrast medium used as acetrizoate sodium in hysterosalpingography.
  • Betazole

    a histamine h2 agonist used clinically to test gastric secretory function.
  • Ceruletide

    a specific decapeptide obtained from the skin of hila caerulea, an australian amphibian. caerulein is similar in action and composition to cholecystokinin. it stimulates gastric, biliary, and pancreatic secretion; and certain smooth muscle. it is used in paralytic ileus and as diagnostic aid in pancreatic malfunction.
  • Cholecystokinin

    a peptide, of about 33 amino acids, secreted by the upper intestinal mucosa and also found in the central nervous system. it causes gallbladder contraction, release of pancreatic exocrine (or digestive) enzymes, and affects other gastrointestinal functions. cholecystokinin may be the mediator of satiety.
  • Receptor, Cholecystokinin A

    a subtype of cholecystokinin receptor found primarily in the pancreas; stomach; intestine; and gallbladder. it plays a role in regulating digestive functions such as gallbladder contraction, pancreatic enzyme secretion and absorption in the gastrointestinal tract.
  • Receptor, Cholecystokinin B

    a subtype of cholecystokinin receptor found primarily in the central nervous system and the gastric mucosa. it may play a role as a neuromodulator of dopaminergic neurotransmission the regulation of gastric acid secretion from gastric parietal cells.
  • Receptors, Cholecystokinin

    cell surface proteins that bind cholecystokinin (cck) with high affinity and trigger intracellular changes influencing the behavior of cells. cholecystokinin receptors are activated by gastrin as well as by cck-4; cck-8; and cck-33. activation of these receptors evokes secretion of amylase by pancreatic acinar cells, acid and pepsin by stomach mucosal cells, and contraction of the pylorus and gallbladder. the role of the widespread cck receptors in the central nervous system is not well understood.
  • Sincalide

    an octapeptide hormone present in the intestine and brain. when secreted from the gastric mucosa, it stimulates the release of bile from the gallbladder and digestive enzymes from the pancreas.
  • Tetragastrin

    l-tryptophyl-l-methionyl-l-aspartyl-l-phenylalaninamide. the c-terminal tetrapeptide of gastrin. it is the smallest peptide fragment of gastrin which has the same physiological and pharmacological activity as gastrin.
  • Coccidioidin

    a sterile solution containing the by-products of growth products of coccidioides immitis, injected intracutaneously as a test for coccidioidomycosis.
  • Congo Red

    an acid dye used in testing for hydrochloric acid in gastric contents. it is also used histologically to test for amyloidosis.
  • Diatrizoate

    a commonly used x-ray contrast medium. as diatrizoate meglumine and as diatrizoate sodium, it is used for gastrointestinal studies, angiography, and urography.
  • Diatrizoate Meglumine

    a versatile contrast medium used for diagnostic x-ray radiology.
  • Evans Blue

    an azo dye used in blood volume and cardiac output measurement by the dye dilution method. it is very soluble, strongly bound to plasma albumin, and disappears very slowly.
  • Fluorescein

    a phthalic indicator dye that appears yellow-green in normal tear film and bright green in a more alkaline medium such as the aqueous humor.
  • Fluorescein Angiography

    visualization of a vascular system after intravenous injection of a fluorescein solution. the images may be photographed or televised. it is used especially in studying the retinal and uveal vasculature.
  • Fluorescein-5-isothiocyanate

    fluorescent probe capable of being conjugated to tissue and proteins. it is used as a label in fluorescent antibody staining procedures as well as protein- and amino acid-binding techniques.
  • Fluoresceins

    a family of spiro(isobenzofuran-1(3h),9'-(9h)xanthen)-3-one derivatives. these are used as dyes, as indicators for various metals, and as fluorescent labels in immunoassays.
  • Histoplasmin

  • Indigo Carmine

    indolesulfonic acid used as a dye in renal function testing for the detection of nitrates and chlorates, and in the testing of milk.
  • Indocyanine Green

    a tricarbocyanine dye that is used diagnostically in liver function tests and to determine blood volume and cardiac output.
  • Inulin

    a starch found in the tubers and roots of many plants. since it is hydrolyzable to fructose, it is classified as a fructosan. it has been used in physiologic investigation for determination of the rate of glomerular function.
  • Iodamide

    an ionic monomeric contrast medium. (from martindale, the extra pharmacopoeia, 30th ed, p706)
  • Iodipamide

    a water-soluble radiographic contrast media for cholecystography and intravenous cholangiography.
  • Iodohippuric Acid

    an iodine-containing compound used in pyelography as a radiopaque medium. if labeled with radioiodine, it can be used for studies of renal function.
  • Iodopyracet

    an ionic monomeric contrast medium that was formerly used for a variety of diagnostic procedures. (from martindale, the extra pharmacopoeia, 30th ed, p706)
  • Ioglycamic Acid

    a radiopaque medium. it is a mixture of its meglumine and sodium salts and is used to visualize the biliary tract.
  • Iohexol

    an effective non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiographic procedures. its low systemic toxicity is the combined result of low chemotoxicity and low osmolality.
  • Iopamidol

    a non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiological procedures.
  • Iopanoic Acid

    radiopaque medium used as diagnostic aid.
  • Ioxaglic Acid

    a low-osmolar, ionic contrast medium used in various radiographic procedures.
  • Metrizamide

    a solute for density gradient centrifugation offering higher maximum solution density without the problems of increased viscosity. it is also used as a resorbable, non-ionic contrast medium.
  • Metrizoic Acid

    a diagnostic radiopaque that usually occurs as the sodium salt.
  • Metyrapone

    an inhibitor of the enzyme steroid 11-beta-monooxygenase. it is used as a test of the feedback hypothalamic-pituitary mechanism in the diagnosis of cushing syndrome.
  • Pentagastrin

    a synthetic pentapeptide that has effects like gastrin when given parenterally. it stimulates the secretion of gastric acid, pepsin, and intrinsic factor, and has been used as a diagnostic aid.
  • Phenolsulfonphthalein

    red dye, ph indicator, and diagnostic aid for determination of renal function. it is used also for studies of the gastrointestinal and other systems.
  • Propyliodone

    radiopaque medium usually in oil; used in bronchography.
  • Enteroendocrine Cells

    cells found throughout the lining of the gastrointestinal tract that contain and secrete regulatory peptide hormones and/or biogenic amines.
  • Secretin

    a peptide hormone of about 27 amino acids from the duodenal mucosa that activates pancreatic secretion and lowers the blood sugar level. (usan and the usp dictionary of drug names, 1994, p597)
  • Tyropanoate

    a diagnostic aid as a radiopaque medium in cholecystography.

Coding Guidelines

Underdosing refers to taking less of a medication than is prescribed by a provider or a manufacturer's instruction. Codes for underdosing should never be assigned as principal or first-listed codes. If a patient has a relapse or exacerbation of the medical condition for which the drug is prescribed because of the reduction in dose, then the medical condition itself should be coded.

The appropriate 7th character is to be added to each code from block Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances (T50). Use the following options for the aplicable episode of care:

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

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10-CM Code Edits are applicable to this code:

  • Unacceptable principal diagnosis - There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Convert T50.8X6A to ICD-9-CM

  • ICD-9-CM Code: -
    No Map Flag -

Table of Drugs and Chemicals

The parent code T50.8X6 of the current diagnosis code is referenced in the Table of Drugs and Chemicals, this table contains a classification of drugs, industrial solvents, corrosive gases, noxious plants, pesticides, and other toxic agents.

According to ICD-10-CM coding guidelines it is advised to do not code directly from the Table of Drugs and Chemicals, instead always refer back to the Tabular List when doing the initial coding. Each substance in the table is assigned a code according to the poisoning classification and external causes of adverse effects. It is important to use as many codes as necessary to specify all reported drugs, medicinal or chemical substances. If the same diagnosis code describes the causative agent for more than one adverse reaction, poisoning, toxic effect or underdosing, utilize the code only once.

Substance Poisoning
Accidental
(unintentional)
Poisoning
Accidental
(self-harm)
Poisoning
Assault
Poisoning
Undetermined
Adverse
effect
Underdosing
Acetrizoate (sodium)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Acetrizoic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
AdipiodoneT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
AmetazoleT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
AmidotrizoateT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Aminohippuric acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Angio-ConrayT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
AzuresinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
BentiromideT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
BetazoleT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
BiligrafinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
BilopaqueT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
BromsulfophthaleinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
BunamiodylT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
CardiografinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Cardio-greenT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
CeruletideT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
CholebrineT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
CholecystokininT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
CholografinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
CoccidioidinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Congo redT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Contrast medium, radiographyT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Diagnostic agent NECT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
DiatrizoateT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
DiodoneT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Ethiodized oil (131 I)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Evans blueT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Fludeoxyglucose (18F)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
FluoresceinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Frei antigenT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Gadopentetic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
GastrografinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
HistalogT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Histamine (phosphate)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
HistoplasminT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
HypaqueT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Indigo carmineT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Indocyanine greenT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
InulinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iobenzamic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iocarmic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iocetamic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IodamideT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IodinatedT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodinated
  »contrast medium
T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodinated
  »glycerol
T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodinated
  »human serum albumin (131I)
T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IodipamideT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodized (poppy seed) oilT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodocholesterol (131I)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodohippuric acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodopanoic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodophthalein (sodium)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IodopyracetT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iodoxamic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IofendylateT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Ioglycamic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IohexolT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IopamidolT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iopanoic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iophenoic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iopodate, sodiumT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iopodic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IopromideT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IopydolT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iotalamic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IothalamateT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IotrolT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IotrolanT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IotroxateT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Iotroxic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IoversolT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IoxaglateT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Ioxaglic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Ioxitalamic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Ipodate, calciumT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
IprofeninT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
LidofeninT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Lygranum (skin test)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Lymphogranuloma venereum antigenT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Methiodal sodiumT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
MetrizamideT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Metrizoic acidT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
MetyraponeT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
OragrafinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Penicilloyl polylysineT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
PentagastrinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
PeptavlonT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
PhenobutiodilT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
PhenolsulfonphthaleinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
PropyliodoneT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
PSP (phenolsulfonphthalein)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Radioactive drug NECT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Radio-opaque (drugs) (materials)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
RenografinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Rose bengal sodium (131I)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Rubidium chloride Rb82T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
SecretinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Selenomethionine (75Se)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
SincalideT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Sulfan blue (diagnostic dye)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Sulfobromophthalein (sodium)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
SulfobromphthaleinT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Sulfonphthal, sulfonphtholT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Sulkowitch's reagentT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Sulphan blueT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
TelepaqueT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Thorium dioxide suspensionT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Toxin, diphtheria (Schick Test)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Tuberculin, purified protein derivative (PPD)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
TyropanoateT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
UrokonT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Xenon (127Xe) (133Xe)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6

Patient Education


Medication Errors

Medicines treat infectious diseases, prevent problems from chronic diseases, and ease pain. But medicines can also cause harmful reactions if not used correctly. Errors can happen in the hospital, at the health care provider's office, at the pharmacy, or at home. You can help prevent errors by:

  • Knowing your medicines. When you get a prescription, ask the name of the medicine and check to make sure that the pharmacy gave you the right medicine. Make sure that you understand how often you should take the medicine and how long you should take it.
  • Keeping a list of medicines.
    • Write down all of the medicines that you are taking, including the names of your medicines, how much you take, and when you take them. Make sure to include any over-the-counter medicines, vitamins, supplements, and herbs that you take.
    • List the medicines that you are allergic to or that have caused you problems in the past.
    • Take this list with you every time you see a health care provider.
  • Reading medicine labels and following the directions. Don't just rely on your memory - read the medication label every time. Be especially careful when giving medicines to children.
  • Asking questions. If you don't know the answers to these questions, ask your health care provider or pharmacist:
    • Why am I taking this medicine?
    • What are the common side effects?
    • What should I do if I have side effects?
    • When should I stop this medicine?
    • Can I take this medicine with the other medicines and supplements on my list?
    • Do I need to avoid certain foods or alcohol while taking this medicine?

Food and Drug Administration


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Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.