US · guidance
CMS Pub. 100-04, ch. 32, § 390
Supervised exercise therapy (SET) Symptomatic Peripheral Artery Disease
Effective for claims with dates of service on or after May 25, 2017, the Centers for Medicare and Medicaid Services
(CMS) will cover supervised exercise therapy (SET) for beneficiaries with intermittent claudication (IC) for the
treatment of symptomatic peripheral artery disease (PAD). Up to 36 sessions over a 12 week period are covered if all of
the following components of a SET program are met:
The SET program must:
• consist of sessions lasting 30-60 minutes comprising a therapeutic exercise-training program for PAD in patients
with claudication;
• be conducted in a physician’s office;
• be delivered by qualified auxiliary personnel necessary to ensure benefits exceed harms, and who are trained in
exercise therapy for PAD; and
• be under the direct supervision of a physician (as defined in 1861(r)(1)) of the Social Security Act (the Act)),
physician assistant, or nurse practitioner/clinical nurse specialist (as identified in 1861(aa)(5)) of (the Act) who
must be trained in both basic and advanced life support techniques.
Beneficiaries must have a face-to-face visit with the physician responsible for PAD treatment to obtain the referral for
SET. At this visit, the beneficiary must receive information regarding cardiovascular disease and PAD risk factor
reduction, which could include education, counseling, behavioral interventions, and outcome assessments.
SET is non-covered for beneficiaries with absolute contraindications to exercise as determined by their primary
attending physician. .
Please refer to the National Coverage Determinations Manual (Publication 100-03, Section 20.35) for more information.
390.1 General Billing Requirements
(Rev. 4049, Issued: 05- 11-18, Effective: 05-25-17, Implementation: 07-02-18)
Effective for claims with date of services on or after May 25, 2017, contractors shall pay claims for SET for
beneficiaries with IC for the treatment of symptomatic PAD, with a referral from the physician responsible for PAD
treatment.
Medicare Administrative Contractors (MACs) have the discretion to cover SET beyond 36 sessions over 12 weeks and
may cover an additional 36 sessions over an extended period of time. Contractors shall accept the inclusion of the KX
modifier on the claim line(s) as an attestation by the provider of the services that documentation is on file verifying that
further treatment beyond the 36 sessions of SET over a 12 week period meets the requirements of the medical policy.
390.2 Coding Requirements for SET
(Rev. 4049, Issued: 05- 11-18, Effective: 05-25-17, Implementation: 07-02-18)
• CPT 93668 – Under Peripheral Arterial Disease Rehabilitation
• ICD-10 Codes
I70.211 –right leg
I70.212 – left leg
I70.213 – bilateral legs
I70.218 – other extremity
I70.311 – right leg
I70.312 – left leg
I70.313 – bilateral legs
I70.318 – other extremity
I70.611 – right leg
I70.612 – left leg
I70.613 – bilateral legs
I70.618 – other extremity
I70.711 – right leg
I70.712 – left leg
I70.713 – bilateral legs
I70.718 – other extremity
390.3 Special Billing Requirements for Institutional Claims
(Rev.4049, Issued: 05- 11-18, Effective: 05-25-17, Implementation: 07-02-18)
Contractors shall pay claims for SET services containing CPT code 93668 on Types of Bill (TOBs) 13X under OPPS and 85X
based on reasonable cost.
Contractors shall pay claims for SET services containing CPT 93668 with revenue codes 096X, 097X, or 098X when billed
on TOB 85X Method II based on 115% of the lesser of the fee schedule amount or the submitted charge.
390.4 Common Working File (CWF) Requirements
(Rev.4049, Issued: 05- 11-18, Effective: 05-25-17, Implementation: 07-02-18)
CWF shall create a new edit for CPT 93668 to reject claims when a beneficiary has reached 36 SET sessions within 84
days after the date of the first SET session and the KX modifier is not included on the claim or to reject any SET session
provided after 84 days from the date of the first session and the KX modifier is not included on the claim.
CWF shall determine the remaining SET sessions.
The CWF determination, to parallel claims processing, shall include all applicable factors including:
• Beneficiary entitlement status
• Beneficiary claims history
• Utilization rules
CWF shall update the determination when any changes occur to the beneficiary master data or claims data that would
result in a change to the calculation.
CWF shall display the remaining SET sessions on all CWF provider query screens.
The Multi-Carrier System Desktop Tool (MCSDT) shall display the remaining SET sessions in a format equivalent to
the CWF HIMR screen(s).
390.5 Applicable Medicare Summary Notice (MSN), Remittance Advice Remark Codes and
Claim Adjustment Reason Code Messaging
(Rev.4049, Issued: 05- 11-18, Effective: 05-25-17, Implementation: 07-02-18)
• Contractors shall deny claims for SET when services are provided on other than TOBs 13X and 85X using the
following messages:
MSN 15.20: “The following policies NCD 20.35 were used when we made this
decision.”
Spanish Version – “Las siguientes políticas NCD 20.35 fueron utilizadas cuando se tomó esta decisión.”
(Part A only) MSN 15.19: “Local Coverage Determinations (LCDs) help Medicare decide what is covered. An
LCD was used for your claim. You can compare your case to the LCD, and send information from your doctor if
you think it could change our decision. Call 1-800-MEDICARE (1-800-633-4227) for a copy of the LCD”.
Spanish Version - Las Determinaciones Locales de Cobertura (LCDs en inglés) le ayudan a decidir a Medicare lo
que está cubierto. Un LCD se usó para su reclamación. Usted puede comparar su caso con la determinación y
enviar información de su médico si piensa que puede cambiar nuestra decisión. Para obtener una copia del LCD,
llame al 1-800-MEDICARE (1800-633-4227).
Claim Adjustment Reason Code (CARC) 58:
“Treatment was deemed by the payer to have been rendered in an inappropriate or invalid place of service.
NOTE: Refer to the 832 Healthcare Policy Identification Segment (loop 2110 Service payment Information
REF), if present.
Remittance advice remark code (RARC) N386: This decision was based on a National Coverage Determination
(NCD) 20.35. An NCD provides a coverage determination as to whether a particular item or service is covered.
A copy of this policy is available at www.cms.gov/mcd/search.asp. If you do not have web access, you may
contact the contractor to request a copy of the NCD.
Contractors shall use Group Code CO (Contractual Obligation) assigning financial liability to the provider, if a claim is
received with a GZ modifier indicating no signed ABN is on file.
• Contractors deny/reject claim lines for CPT 93668 without one of the diagnosis codes listed in 390.2 and use the
following messages:
MSN 15.20: “The following policies NCD 20.35 were used when we made this
decision.”
Spanish Version – “Las siguientes políticas NCD 20.35 fueron utilizadas cuando se tomó esta decisión.”
(Part A only) MSN 15.19: “Local Coverage Determinations (LCDs) help Medicare decide what is covered. An
LCD was used for your claim. You can compare your case to the LCD, and send information from your doctor if
you think it could change our decision. Call 1-800-MEDICARE (1-800-633-4227) for a copy of the LCD”.
Spanish Version - Las Determinaciones Locales de Cobertura (LCDs en inglés) le ayudan a decidir a Medicare lo
que está cubierto. Un LCD se usó para su reclamación. Usted puede comparar su caso con la determinación y
enviar información de su médico si piensa que puede cambiar nuestra decisión. Para obtener una copia del LCD,
llame al 1-800-MEDICARE (1800-633-4227).
CARC 167 – This (these) diagnosis(es) is (are) not covered. Note: Refer to the 835 Healthcare Policy
Identification Segment (loop 2110 Service Payment Information REF), if present.
RARC N386 – “This decision was based on a National Coverage Determination (NCD). An NCD provides a
coverage determination as to whether a particular item or service is covered. A copy of this policy is available at
www.cms.gov/mcd/search.asp. If you do not have web access, you may contact the contractor to request a copy
of the NCD.”
Contractors shall use Group Code PR (Patient Responsibility) assigning financial liability to the beneficiary if a
claim is received with a GA modifier indicating a signed ABN is on file.
Contractors shall use Group CO (Contractual Obligation) assigning financial liability to the provider, if a claim is
received with a GZ modifier indicating no signed ABN is on file.
• Contractors shall reject claims with CPT 93668 which exceed 36 sessions within 84 days from the date of the
first session when the KX modifier is not included on the claim line OR any SET session provided after 84 days
from the date of the first session and the KX modifier is not included on the claim and use the following
messages:
96- Non-covered charge(s). At least one Remark Code must be provided (may be comprised of either the NCPDP Reject
Reason [sic] Code, or Remittance Advice Remark Code that is not an ALERT.)
Note: Refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment Information REF), if
present.
N640 Exceeds number/frequency approved/allowed within time period.
Group Code CO (Contractual Obligation) assigning financial liability to the provider (if a claim line-item is
received with a GZ modifier indicating no signed ABN is on file and occurrence code 32 is not present).
• Contractors shall deny/reject claim lines with CPT 93668 when sessions have reached 73 sessions using the
following messages:
MSN 15.20: “The following policies NCD 20.35 were used when we made this decision.”
Spanish Version – “Las siguientes políticas NCD 20.35 fueron utilizadas cuando se tomó esta decisión.”
(Part A only) MSN 15.19: “Local Coverage Determinations (LCDs) help Medicare decide what is covered. An
LCD was used for your claim. You can compare your case to the LCD, and send information from your doctor if
you think it could change our decision. Call 1-800-MEDICARE (1-800-633-4227) for a copy of the LCD”.
Spanish Version - Las Determinaciones Locales de Cobertura (LCDs en inglés) le ayudan a decidir a Medicare lo
que está cubierto. Un LCD se usó para su reclamación. Usted puede comparar su caso con la determinación y
enviar información de su médico si piensa que puede cambiar nuestra decisión. Para obtener una copia del LCD,
llame al 1-800-MEDICARE (1800-633-4227).
CARC 119: “Benefit maximum for this time period or occurrence has been reached.”
RARC N386: “This decision was based on a National Coverage Determination (NCD). An NCD provides a
coverage determination as to whether a particular item or service is covered. A copy of this policy is available at
www.cms.gov/mcd/search.asp. If you do not have web access, you may contact the contractor to request a copy
of the NCD.”
Group Code PR (Patient Responsibility) assigning financial responsibility to the beneficiary (if a claim is
received with occurrence code 32 with or without a GA modifier or a claim-line is received with a GA modifier
indicating a signed ABN is on file)
Group Code CO (Contractual Obligation) assigning financial liability to the provider (if a claim line-item is
received with a GZ modifier indicating no signed ABN is on file and occurrence code 32 is not present
• Contractors shall deny claim line-items for SET, CPT 93668, when sessions have reached 73 sessions with or
without the KX Modifier present using the following messages:
MSN 15.20: “The following policies NCD 20.35 were used when we made this decision.”
Spanish Version – “Las siguientes políticas NCD 20.35 fueron utilizadas cuando se tomó esta decisión.”
(Part A only) MSN 15.19: “Local Coverage Determinations (LCDs) help Medicare decide what is covered. An
LCD was used for your claim. You can compare your case to the LCD, and send information from your doctor if
you think it could change our decision. Call 1-800-MEDICARE (1-800-633-4227) for a copy of the LCD”.
Spanish Version - Las Determinaciones Locales de Cobertura (LCDs en inglés) le ayudan a decidir a Medicare lo
que está cubierto. Un LCD se usó para su reclamación. Usted puede comparar su caso con la determinación y
enviar información de su médico si piensa que puede cambiar nuestra decisión. Para obtener una copia del LCD,
llame al 1-800- MEDICARE (1800-633-4227).
CARC 119: “Benefit maximum for this time period or occurrence has been reached.”
RARC N386: “This decision was based on a National Coverage Determination (NCD). An NCD provides a
coverage determination as to whether a particular item or service is covered. A copy of this policy is available at
www.cms.gov/mcd/search.asp. If you do not have web access, you may contact the contractor to request a copy
of the NCD.”
Group Code PR (Patient Responsibility) assigning financial responsibility to the beneficiary (if a claim is
received with occurrence code 32 with or without a GA modifier or a claim-line is received with a GA modifier
indicating a signed ABN is on file)
Group Code CO (Contractual Obligation) assigning financial liability to the provider (if a claim line-item is
received with a GZ modifier indicating no signed ABN is on file and occurrence code 32 is not present).
History
(Rev. 4049, Issued: 05- 11-18, Effective: 05-25-17, Implementation: 07-02-18)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
d3b46eea8baa0e1fdf11116e64b8a110eff13b72cf93d30154f7b7569e9ea70c
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