$re = '/^(?=\S.+\nCoverage\sLevel)|^(?=\S.+\nNon-Covered\s)/m';
$str = 'Out of Pocket (Stop Loss)
Coverage Level: Individual
Service Type: Health Benefit Plan Coverage
Insurance Type Code: HM Health Maintenance Organization (HMO)
Time Period Qualifier: Calendar Year
Amount: $8,500.00
In Plan Network Indicator: Unknown
Deductible
Coverage Level: Individual
Service Type: Vision (Optometry)
https://luna.ema.md/ema/patient/InsuranceOverviewForm.action?pic1.0u85-w2bBh0R86_K9v71KolpMN1sZmZ0Lxolu1TW4qD3al-JJFDVNX81... 13/172/21/22, 10:26 AM Luna Dermatology: Patient Insurance
Insurance Type Code: HM Health Maintenance Organization (HMO)
Plan Coverage Description: Fidelis Care Silver
Amount: $0.00
Authorization/Certification Req\'d: No
In Plan Network Indicator: no
Co-Payment
Coverage Level: Individual
Service Type: Vision (Optometry)
Insurance Type Code: HM Health Maintenance Organization (HMO)
Plan Coverage Description: Fidelis Care Silver
Amount: $0.00
Authorization/Certification Req\'d: No
In Plan Network Indicator: Yes
Co-Insurance
Coverage Level: Individual
Service Type: Vision (Optometry)
Insurance Type Code: HM Health Maintenance Organization (HMO)
Plan Coverage Description: Fidelis Care Silver
Authorization/Certification Req\'d: No
In Plan Network Indicator: Unknown
Out of Pocket (Stop Loss)
Coverage Level: Family
Service Type: Health Benefit Plan Coverage
Insurance Type Code: HM Health Maintenance Organization (HMO)
Time Period Qualifier: Remaining
Amount: $16,190.82
In Plan Network Indicator: Unknown
Non-Covered
Coverage Level: Individual
Service Type: Medical Care
Insurance Type Code: HM Health Maintenance Organization (HMO)
Plan Coverage Description: Fidelis Care Silver
In Plan Network Indicator: No
Message: Medical Care
Non-Covered
Coverage Level: Individual
Service Type: Durable Medical Equipment Purchase
Insurance Type Code: HM Health Maintenance Organization (HMO)
Plan Coverage Description: Fidelis Care Silver
In Plan Network Indicator: No
Message: DME Purchase';
$subst = "\n";
$result = preg_replace($re, $subst, $str);
echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php