Admit Diagnosis

For other diagnoses, see Comorbid Diagnosis and Acquired Diagnosis / Complication.

Admit diagnoses are what led to the start of the patient's current PatientFollow Project profile. An Admit Diagnosis is coded by setting the Dx_Type to "admit". We make special use of the Primary Admit Diagnosis, so make sure you consider the content there.

Collection Instructions

Como Admit Acquired Primary Limits - this is part of that discussion - if we limit which admits will count as comos we need to review

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When to use Comorbid Diagnosis vs Admit Diagnosis or neither

When not to code a dx at all

• Dx was present in the past but that problem is resolved AND does not fit into one of the Category: Past medical history codes
  • To be clear on this -- do NOT code past problems that are fully resolved unless they are one of the Category: Past medical history codes

Example:

Patient had the left lung removed 7 years ago. Dont code the removal of the lung CCI, but instead code Past history, removal of all or part of lung For someone who had a Cardiac arrest in the past, don't code that as a Comorbid Diagnosis in future admissions, but instead DO code the cause of the cardiac arrest, e.g. an arrythmia, or coronary artery disease, etc. Patient has hypertension for which she takes medications and it is well controlled, but not related to the reasons for admission. Code this, because even if not part of the reason for the current admission, the hypertension IS relevant to this person's chronic medical situation and thus SHOULD be coded, as a Comorbid Diagnosis. Patient had ARDS (noncardiogenic pulmonary edema) a few years ago, and while ARDS is only an acute problem and thus is no longer active, his lungs never fully recovered and he has Respiratory failure (insufficiency), chronic which should be coded as a Comorbid Diagnosis. Chronic and ongoing old conditions should be coded -- as a Comorbid Diagnosis if not part of the reason for this admission.

Some diagnoses can/should be coded as BOTH Admit Diagnosis and Comorbid Diagnosis

If a dx is chronic but also actively treated during this admission, code it as both Admit Diagnosis and Comorbid Diagnosis.

Example:

ex1: Patient who has been, and still is, being treated for active pulmonary TB as an outpatient, and is admitted for an acute MI. Here since on the current admission the TB is still being actively treated, it qualifies as an Admit Diagnosis, as above. But because it has been present from long before this admission, it also qualifies as an "active" Comorbid Diagnosis. ex2: Patient has a past history of CHF and thus it should be coded as a Comorbid Diagnosis. And if the CHF is worse at admission and it is part of the reason for admission, then CHF should also be an Admit Diagnosis too.

Recurrent conditions

• Do not code a recurrent condition that is NOT currently present -- if currently active, include as Admit Diagnosis, otherwise don't code it

Example:

Ex1: Recurrent pneumonia -- in between the infections, there IS NO pneumonia

• • Do code conditions that by nature have intermittent rather than continuous symptoms, but where the underlying condition doesn't go away.
• Ex2: Asthma, without acute exacerbation -- this 'is a chronic disease whose nature is intermittent symptoms, but in between those symptoms the person still has asthma.}}

Past medical history codes

Past medical history codes should only be captured as Comorbid Diagnoses that represent previous procedures or medical situations that can't be captured in another way. Their names usually follow the pattern "Past history of X" or "X, has one". See Category:Past medical history for a list.

Controlling Dx Type for ICD10 codes

This wiki page talks about which ICD10 codes are allowed to be Comorbid Diagnosis vs. Admit Diagnosis vs. Acquired Diagnosis Dx Type. See Controlling Dx Type for ICD10 codes for a discussion about cross-checks for these.

Legacy - did not use to code Comorbid Diagnoses only discovered during this admission

see how this used to be coded...

As of June 25, 2020, the rules were revised for coding as Comorbid Diagnoses those diagnosed during the current hospitalization (either at admission or thereafter) but which virtually certainly were present pre-admission.

Como Admit Acquired Primary Limits - this is part of that discussion - if we limit which admits will count as comos we need to review

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When to code an Admit Diagnosis vs Acquired Diagnosis

• Distinction between Admit Diagnoses and Acquired Diagnoses relate to the start of a PatientFollow Project profile. An Admit Diagnosis needs to be present at the start of a PatientFollow Project profile. Diagnoses that occur after will be Acquired Diagnosis.

Example:

Example1 -- patient's care is taken over by Medicine service while he is still in ED. The admission diagnosis is DKA. He remains on Medicine service in ED (due to lack of ward beds) for 2 days, after which he finally gets up to the Medicine ward and then has a stroke. The stroke is an Acquired Diagnosis, and would still be acquired even if it had occurred during those 2 days in ED. AND Dx is relevant to this admission in that it is either: (a) an acute or exacerbated condition (as opposed to a chronic, stable condition -- e.g. stable diabetes), OR (b) it is a condition not directly related to the reason(s) for admission, but its treatment is being actively managed -- and by actively we mean that during this admission changes are made to the management. Example2: Patient with TB has been treated for the past 5 (of his 9 expected) months admitted now for acute MI. Scenario#1:No changes made in his TB treatment ---> so NOT an Admit Diagnosis (but this active TB is a Comorbid Diagnosis ) Scenario#2:Changes are made to his TB treatment during this admission ---> so IS an Admit Diagnosis too

Onset not discovery

Acquired diagnoses do not refer to diagnoses that have been discovered after the patient comes to the unit if it is likely that the patient was admitted to ward with the problem in the first place but it took a few days to figure that out. Code these as Comorbid Diagnosis, and also, if appropriate (i.e. it was related to the reason for admission) as a Admit Diagnosis.

Diagnosis categories in relation to patients moving around the hospital

• This section explains how to determine the Dx Types as a patient moves from place to place within a hospital -- i.e. during a single hospitalization. In this section we'll refer to a person who moves from A to B to C (e.g. A and C are ICU while B is ward; so 3 separate records in the database)
• Rule#1: Situation where a diagnosis is NEW to this hospitalization [i.e. either it: (a) was an Admit Diagnosis to location A that was not a chronic, pre-existing disorder before hospitalization, OR (b) developed after admission, as an acquired diagnosis while in location A], then:
  • when you start records B or C do NOT include that diagnosis as a comorbid
  • if by the time they are transferred to the subsequent location it is resolved and no longer being treated, then it should not show up as any kind of diagnosis for that subsequent record
  • if by the time they are transferred to the subsequent location it is still being dealt with medically, and indeed is part of the reasons they are going to the new location, then it should be listed as an Admit Diagnosis for that subsequent record
• Rule#2: The group of diagnoses that represent "past history" (e.g. Past history, loss of limb(s) are also guided by Rule#1.
• Rule#3: The "duration" of a diagnostic event (e.g. pneumonia vs. an arrythmia) has no role in decision-making about how these diagnoses are listed (or not)

Rules 1 and 2 are clear, could rule 3 be further clarified

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Example:

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Legacy - prior to PatientFollow Project

expand for pre-PatientFollow Project info

Prior to PatientFollow Project there was one record per ward/unit stay, so the distinction between Admit Diagnosis and Acquired Diagnosis would have been made on a per-unit basis; since then it is made on a per-PatientFollow Project profile basis.

Controlling Dx Type for ICD10 codes

This wiki page talks about which ICD10 codes are allowed to be Comorbid Diagnosis vs. Admit Diagnosis vs. Acquired Diagnosis Dx Type. See Controlling Dx Type for ICD10 codes for a discussion about cross-checks for these.

Data Structure

Admit Diagnoses are drawn from S_ICD10 table and stored in L_ICD10 table.

Legacy Information

Maximum Number of Admit Diagnoses

Until we started to use Centralized data.mdb we were limited to 6 admit diagnoses. For some time CCMDB.accdb had been able to record any number of admit diagnoses. However, only the six (6) with the highest priority were appended to TMSX.

Data Integrity Checks (SMW)

	App	Status
Check if awaiting code is primary dx then Transfer Ready DtTm must be equal to Arrive DtTm	CCMDB.accdb	declined
Query check ICD10 date	CCMDB.accdb	implemented
Query check dx primary not exactly one	CCMDB.accdb	implemented
Query check VAP admit must be from ICU	CCMDB.accdb	retired