Skip to main content

Recording autism and ADHD assessments in Mental Health Services Data set (MHSDS)

This technical guidance aims to provide detailed information as to how to record referrals in MHSDS at each step in the referral pathway for suspected:

  • autism
  • ADHD
  • autism and ADHD

All providers of NHS-funded ADHD and autism services must submit data to the appropriate national dataset, as required under the NHS Standard Contract (unless otherwise stated).

If an autism and/or ADHD assessment is delivered as part of a neurodevelopmental assessment within an NHS-funded, mental health-commissioned service, it must be reported under the MHSDS.

We appreciate that not all services will follow the linear pathway outlined in this guidance, but we encourage everyone to record the following key stages in the pathway: 

Referral and Primary Reason for Referral
Assessment
Diagnosis
Discharge or End of Referral

You should also record any relevant care contacts and care activities throughout the pathway.

Please note this guidance refers to MHSDS v6.0.

Autism referrals

Referral

When it becomes clear that a referral for autism assessment is required then please record 'Suspected Autism' as the primary reason for referral in clinical system, along with the date the referral was made. 

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS101Referral
 
M101080 PrimReasonReferralMH 25
MHS101Referral    
 
M101D09   RecordStartDate Date of referral

Please ensure all prior referrals in the pathway are recorded appropriately, that is, referrals to MDT teams or Mental Health Services. 

Assessment 

If the assessment is attended then update the care contact field to reflect this and the method of assessment, then add a care activity to indicate an autism assessment using SNOMED code '1085671000000109'. 

You should also record the date of the assessment. 

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS201CareContact M201220 ConsMechanismMH 01,02,04 OR 11
MHS201CareContact M201090 AttendStatus 5 or 6
 
MHS201CareContact M201010 CareContDate Date of assessment
 
MHS202CareActivity M202110 Procedure 1085671000000109
 

Note: If the assessment takes place over multiple sessions or dates, please record each individual assessment as above. 

Diagnosis

If diagnosis of autism is confirmed, record autism as primary diagnosis and ensure the date of the diagnosis is recorded.

Note: The date should reflect when the diagnosis was given to the patient NOT when it is recorded in the system.

In MHSDS if using SNOMED this means:

MHSDS table MHSDS UID Element name National code
MHS604PrimDiag M604913 DiagSchemeInUse 06
MHS604PrimDiag M604010 PrimDiag AUTISM_COD
 
MHS604PrimDiag M604020 CodedDiagTimestamp Timestamp

For a list of the most common SNOMED codes used for autism see appendix 1.

It is preferable to submit data using SNOMED codes, however if providers wish to submit a diagnosis of autism using ICD-10 codes this can be done using the following:

MHSDS table MHSDS UID Element name National code
MHS604PrimDiag M604913 DiagSchemeInUse 02
MHS604PrimDiag M604010 PrimDiag All F84.0 (excluding F84.2 and F84.4), F88, F89
MHS604PrimDiag M604020 CodedDiagTimestamp Timestamp

Further care contacts and activity

Record any other relevant care by updating care contact and care activity as required. For example, if a medication review is carried out, record medication review using the appropriate SNOMED code '1099461000000101'. A telephone call being made to the patient can be recorded within the care contact table. These are just examples of care contacts and activity that could be recorded – providers should continue to record additional care activity as has been done previously. 

For example:

MHSDS table MHSDS UID Element name National code
MHS202CareActivity M202110 Procedure 1099461000000101

 

MHSDS table MHSDS UID Element name National code
MHS201CareContact M201220 ConsMechanismMH 02 (for example, for telephone)
MHS201CareContact M201010 CareContDate Date

Please note that further care contacts and activity can be recorded at any point in the process between referral and discharge. 

Discharge

After assessment, diagnosis (or not being diagnosed) and all additional care contacts and activity, then record the discharge from the service when appropriate to do so. Discharge may not happen for some time after the assessment for multiple reasons.

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS101Referral M101090 ServDischDate Date
MHS101Referral M101110 ServDischTime Time
ADHD referrals

Referral

When it becomes clear that a referral for ADHD is required, record 'Neurodevelopmental Conditions, excluding Autism' as primary reason for referral in clinical system and add 'Suspected ADHD' as a presenting complaint. 

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS101Referral M101080 PrimReasonReferrMH 24
MHS609PresComp M609020 FindSchemeInUse 04
MHS609PresComp M609030     PresComp 1863681000000108
 
MHS101Referral M101D09 RecordStartDate Date of referral

Please ensure all prior referrals in the pathway are recorded appropriately, that is, referrals to MDT teams or Mental Health Services. 

Assessment

If the assessment is attended then update the care contact field to reflect this and the method of assessment. Then add a care activity to indicate an ADHD assessment using SNOMED code '1914891000000100'.

You should also record the date of the assessment. 

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS201CareContact M201220 ConsMechanismMH 01,02,04 OR 11
 
MHS201CareContact M201090 AttendStatus 5 or 6
MHS201CareContact M201010 CareContDate Date of assessment
MHS202CareActivity M202110 Procedure 1914891000000100
 

Note: If the assessment takes place over multiple sessions or dates, please record each individual assessment as above. 

Diagnosis

If diagnosis of ADHD is confirmed then record ADHD as primary diagnosis and ensure the date of the diagnosis is recorded.

Note: The date should reflect when the diagnosis was given to the patient NOT when it is recorded in the system.

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS604PrimDiag M604913 DiagSchemeInUse 06
MHS604PrimDiag M604010 PrimDiag ADHD_COD
MHS604PrimDiag M604020 CodedDiagTimestamp Timestamp

For a list of the most common SNOMED codes used for ADHD see appendix 1.

It is preferable to submit data using SNOMED codes, however if providers wish to submit a diagnosis of ADHD using ICD-10 codes this can be done using the following:

MHSDS table MHSDS UID Element name National code
MHS604PrimDiag M604913 DiagSchemeInUse 02
MHS604PrimDiag     M604010 PrimDiag F90.0
MHS604PrimDiag M604020 CodedDiagTimestamp Timestamp

Further care contacts and activity

Record any other relevant care by updating care contact and care activity as required. For example, if a medication review is carried out record medication review using the appropriate SNOMED code '1099461000000101'. A telephone call being made to the patient can be recorded within the care contact table. These are just examples of care contacts and activity that could be recorded – providers should continue to record additional care activity as has been done previously.

For example:

MHSDS table MHSDS UID Element name National code
MHS202CareActivity M202110 Procedure 1099461000000101

 

MHSDS table MHSDS UID Element name National code
MHS201CareContact M201220 ConsMechanismMH 02 (for example, for telephone)
 
MHS201CareContact M201010 CareContDate Date

Please note that further care contacts and activity can be recorded at any point in the process between referral and discharge. 

Discharge

After assessment, diagnosis (or not being diagnosed) and all additional care contacts and activity, then record the discharge from the service when appropriate to do so. Discharge may not happen for some time after the assessment for multiple reasons.

MHSDS table MHSDS UID Element name National code
MHS101Referral M101090 ServDischDate Date
MHS101Referral     M101110 ServDischTime Time
Autism and ADHD referrals

Referral

When it becomes apparent there is a need for both an autism and ADHD assessment to be carried out please record 'Suspected Autism' as primary reason for referral in clinical system AND 'Neurodevelopmental Conditions, excluding Autism' as the other reason for referral, AND add 'Suspected ADHD' and 'Suspected Autism' as presenting complaints.

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS101Referral M101080 PrimReasonReferrMH 25
MHS103OtherReasonReferral M103010 OtherReasonReferMH 24
MHS609PresComp M609020 FindSchemeInUse 04
MHS609PresComp M609030 PresComp 1863681000000108
MHS609PresComp M609030 PresComp 401204006
MHS101Referral M101D09 RecordStartDate Date of referral

Note: The referring clinician may decide it is more appropriate to class ADHD as the primary reason for referral. If so then record 'Neurodevelopmental Conditions, excluding Autism' as the primary reason for referral in clinical system AND record 'Suspected Autism' as the other reason for referral, AND add 'Suspected ADHD' and 'Suspected Autism' as presenting complaints.

Please ensure all prior referrals in the pathway are recorded appropriately, that is, referrals to MDT teams or Mental Health Services. 

Assessment 

If the autism assessment is attended then update the care contact field to reflect this and the method of assessment, then add a care activity to indicate an autism assessment using SNOMED code '1085671000000109'.

You should also record the date of the assessment. 

In MHSDS this means: 

MHSDS table MHSDS UID Element name National code
MHS201CareContact M201220 ConsMechanismMH 01,02,04 OR 11
MHS201CareContact M201090     AttendStatus 5 or 6
MHS201CareContact M201010 CareContDate Date of assessment
MHS202CareActivity M202110 Procedure 1085671000000109

If the ADHD assessment is attended then update the care contact field to reflect this and the method of assessment, then and add a care activity to indicate an ADHD assessment using SNOMED code '1914891000000100'.

You should also record the date of the assessment. 

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS201CareContact M201220 ConsMechanismMH 01,02,04 OR 11
MHS201CareContact M201090 AttendStatus 5 or 6
MHS201CareContact M201010 CareContDate Date of assessment
MHS202CareActivity M202110 Procedure 1914891000000100

Note: If either assessment takes place over multiple sessions or dates, please record each individual assessment as above.

Diagnosis

If a diagnosis is made for only one condition then follow autism or ADHD specific guidance.

If diagnosed with both autism and ADHD then record:

  • autism as the primary diagnosis 
  • ADHD as a secondary diagnosis

Ensure the diagnosis date is recorded.

Note: The date should reflect when the diagnosis was given to the patient NOT when it is recorded in the system.

In MHSDS this means:

MHSDS table MHSDS UID Element name National code
MHS604PrimDiag M604913 DiagSchemeInUse 06
MHS604PrimDiag M604010 PrimDiag AUTISM_COD
MHS604PrimDiag M604020 CodedDiagTimestamp Timestamp
MHS605SecDiag M605913 DiagSchemeInUse 06
MHS605SecDiag M605010 SecDiag ADHD_COD
MHS605SecDiag M605020 CodedDiagTimestamp Timestamp

For a list of the most common SNOMED codes used for autism and ADHD see appendix 1.

The clinician may decide it is more appropriate to record ADHD as the primary diagnosis and autism as the secondary diagnosis, in which case the following would need to be recorded in MHSDS:

MHSDS table MHSDS UID Element name National code
MHS604PrimDiag M604913 DiagSchemeInUse 06
MHS604PrimDiag M604010 PrimDiag ADHD_COD
MHS604PrimDiag M604020 CodedDiagTimestamp Timestamp
MHS605SecDiag M605913 DiagSchemeInUse 06
MHS605SecDiag M605010 SecDiag AUTISM_COD
MHS605SecDiag M605020 CodedDiagTimestamp Timestamp

It is preferable to submit data using SNOMED codes, however if providers wish to submit a diagnosis of autism using ICD-10 codes this can be done using the following:

MHSDS table MHSDS UID Element name National code
MHS604PrimDiag M604913 DiagSchemeInUse 02
MHS604PrimDiag M604010 PrimDiag All F84.0 (excluding F84.2 and F84.4), F88, F89
 
MHS604PrimDiag M604020 CodedDiagTimestamp Timestamp

If providers wish to submit a diagnosis of ADHD using ICD-10 codes, this can be done using the following:

MHSDS table MHSDS UID Element name National code
MHS604PrimDiag M604913 DiagSchemeInUse 02
MHS604PrimDiag M604010 PrimDiag F90.0
MHS604PrimDiag M604020 CodedDiagTimestamp Timestamp
Appendix 1

Autism SNOMED codes

Full list of all SNOMED codes relating to autism.

The most commonly used codes:

35919005 - Pervasive developmental disorder (disorder)
408856003 - Autistic disorder (disorder)
23560001 - Asperger's disorder (disorder)

ADHD SNOMED codes

Full list of all SNOMED codes relating to ADHD.

The most commonly used codes:

406506008 - Attention deficit hyperactivity disorder (disorder)

Last edited: 3 June 2025 11:46 am