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HCPCS Level II M1111: Start of Episode of Care, Documentation

HCPCS Level II code M1111 designates the documented start of an episode of care in the medical record. As an administrative-clinical marker, this code signals the initiation of services tied to a defined episode, which can affect care coordination, utilization tracking, and claims processing at a national level. Clear use of this code helps standardize when an episode begins across providers and payers, supporting downstream billing and quality measurement workflows.

Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find concise guidance on the clinical context for applying M1111, typical sites of service, and where this code fits within episode-based documentation practices. The publication summarizes common billing modifiers associated with the code, notes on payer coverage patterns when available, and related operational considerations for claims submission. It also outlines benchmarking and policy-relevant issues that influence how episode initiation is recorded and adjudicated nationally.

Intended for billing managers, clinicians involved in documentation, and policy analysts, this summary frames the practical and policy implications of documenting episode starts, while indicating where input data was not available for more granular items such as associated taxonomies or ICD-10 linkage.

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Billing Code Overview

HCPCS Level II code M1111 indicates the start of an episode of care documented in the medical record. This code represents documentation that a new episode of care has begun for a patient, serving as an administrative and clinical marker in the medical record.

Service type: Care episode initiation and documentation
Typical site of service: Outpatient clinic or ambulatory care setting where episodes of care are documented, including physician offices and outpatient specialty clinics

Data not available in the input.

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HCPCS Level II M1111: Start of Episode of Care, Documentation

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Get alerted when payer policies referencing M1111 are released or updated.

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Billing Code Overview

Service type: Care episode initiation and documentation
Typical site of service: Outpatient clinic or ambulatory care setting where episodes of care are documented, including physician offices and outpatient specialty clinics

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A patient presents to an outpatient clinic or ambulatory surgery center for initiation of an episode of care documented in the medical record using billing code M1111. Typical patients include those referred for a new course of rehabilitative services, durable medical equipment (DME) management, or commencement of a structured treatment plan requiring formal episode tracking. Example scenario: a 64-year-old patient with new onset knee osteoarthritis is evaluated by an orthopedic physician and physical therapist. The clinician documents the start of the episode of care, including baseline functional status, treatment goals, care plan, and planned interventions, and records the episode start date in the medical record to support M1111 billing.

Typical clinical workflow:

The patient is registered and triaged in an outpatient clinic, ambulatory surgery center, or physical therapy clinic.
The ordering or treating clinician performs evaluation and documents the start of an episode of care in the medical record, including history, baseline measures, treatment plan, and anticipated length of episode.
Relevant diagnostics or assessments (imaging, functional scores) are obtained as needed.
The clinic coder assigns M1111 to indicate the documented start of the episode; associated CPT codes for evaluations, procedures, or therapy sessions are billed separately according to services rendered.
Modifiers are appended where clinically indicated to reflect unusual circumstances (e.g., increased complexity, discontinued services, unusual anesthesia) per payer rules.

Typical site of service:

Outpatient clinic
Ambulatory surgery center
Physical therapy or rehabilitation facility

Typical patient scenario:

New or reactivated episode of care requiring documentation of episode start for care management, authorization, or DME rental/loaner initiation.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the documented work or complexity substantially exceeds typical for the episode start documentation and payer allows the modifier for evaluation complexity.
`23`	Unusual anesthesia	Use when general anesthesia was required for an associated procedure at episode initiation and is unusual for the service setting.
`52`	Reduced services	Use when the episode start was partially performed or scope was reduced compared with standard documentation (payer-specific).
`53`	Discontinued procedure	Use when initiation of the episode was not completed because the procedure or visit was discontinued for patient safety or other valid reason.
`54`	Surgical care only	Use when billing only the surgical portion of care and the start of the episode pertains to surgical perioperative management.
`55`	Postoperative management only	Use when only postoperative management during the episode is billed separate from surgical care.
`56`	Preoperative management only	Use when only preoperative management is billed at the start of the episode.
`62`	Two surgeons	Use when two surgeons with distinct specialties are required at episode start for initial procedures or planning and payers allow shared payment with modifier `62`.
`AS`	Non‑physician anesthetist	Use when a Certified Registered Nurse Anesthetist provided anesthesia services for an associated procedure at episode initiation.
`CO`	Items or services furnished per CHAMPVA	Use when the beneficiary is covered under CHAMPVA and the episode start is billed under that benefit category.
`CQ`	Service furnished by a CRNA billing independently	Use when a CRNA furnished services independently and the episode start is billed under that provider role where allowed.
`FX`	Fixed prosthesis	Use when the episode start involves documentation related to fixed prosthetic services (dental/prosthetic applications) as applicable.
`FY`	Prosthetic procedures	Use when the episode start documents initiation of care related to prosthetic device fabrication or delivery.
`QK`	Medical direction of two, three, or four CRNAs	Use when medical direction is documented at the episode start for CRNA services.
`QX`	CRNA service with medically directed anesthesia	Use when a CRNA provided service under medical direction documented at episode initiation.

Taxonomy Code	Specialty	Notes
207P00000X	Physical Therapist	Performs evaluation and documents start of rehabilitative episode.
207L00000X	Occupational Therapist	Initiates episodes for occupational therapy interventions and documents care plan.
207ZP0100X	Orthopedic Surgery	Orders and documents episode start for surgical or nonoperative orthopedic care.
261QR0200X	Anesthesiology	Involved when anesthesia is required for an associated procedure at episode initiation.
208M00000X	Family Medicine	Primary care physicians who initiate care episodes and coordinate conservative management plans.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.	Data not available in the input.	Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99203`	Office or other outpatient visit for the evaluation and management of a new patient, typically 30 minutes	Used when a comprehensive new patient E/M visit documents the start of the episode and provides the evaluation supporting `M1111`.
`97161`	Physical therapy evaluation (low complexity)	Often performed at episode initiation to establish baseline function and plan therapy associated with the episode.
`97750`	Physical performance test or measurement (e.g., timed walk)	Performed at the start of an episode to document baseline functional status.
`11042`	Debridement, subcutaneous tissue (example surgical procedure)	May be performed early in an episode of wound care and documented alongside the episode start.
`97001`	Physical therapy evaluation (historical CPT older code)	Historical use; when documented as the initial therapy evaluation it supports episode initiation documentation.

HCPCS Level II M1120: Ongoing Care Not Possible Due to Patient Self-Discharge

HCPCS-M1106-START-OF-EPISODE-OF-CARE

HCPCS M1106: Start of Episode of Care

HCPCS-M1107-DEGENERATIVE-NEUROLOGICAL-DIAGNOSIS-DOCUMENTATION

HCPCS Level II M1107: Documentation of Degenerative Neurological Diagnosis

HCPCS-M1108-HOME-PROGRAM-REFERRAL-CONSULTATION-ONLY

HCPCS M1108: Ongoing Care Not Clinically Indicated; Home Program/Referral/Consult

HCPCS-M1109-ONGOING-CARE-INTERRUPTED-DUE-TO-EARLY-DISCHARGE

HCPCS M1109: Ongoing Care Interrupted Due to Early Discharge

HCPCS-M1110-EARLY-SELF-DISCHARGE-CARE-INTERRUPTED

HCPCS M1110: Ongoing Care Interrupted by Patient Self-Discharge

HCPCS-M1112-DEGENERATIVE-NEUROLOGICAL-DIAGNOSIS-DOCUMENTATION

HCPCS Level II M1112: Documentation of Degenerative Neurological Diagnosis

HCPCS-M1113-ONGOING-CARE-NOT-CLINICALLY-INDICATED-HOME-PROGRAM-REFERRAL-CONSULTATION

HCPCS M1113: Ongoing Care Not Clinically Indicated (Home Program/Referral/Consult)

HCPCS-M1114-CARE-DISCONTINUED-DUE-TO-HOSPITALIZATION-OR-SURGERY

HCPCS M1114: Care Discontinued Due to Hospitalization or Scheduled Surgery

HCPCS-M1115-PATIENT-SELF-DISCHARGE-INTERRUPTED-CARE

HCPCS M1115: Ongoing Care Interrupted by Patient Self-Discharge

Showing 1–10 of 37

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Typical clinical workflow:

The patient is registered and triaged in an outpatient clinic, ambulatory surgery center, or physical therapy clinic.
The ordering or treating clinician performs evaluation and documents the start of an episode of care in the medical record, including history, baseline measures, treatment plan, and anticipated length of episode.
Relevant diagnostics or assessments (imaging, functional scores) are obtained as needed.
The clinic coder assigns M1111 to indicate the documented start of the episode; associated CPT codes for evaluations, procedures, or therapy sessions are billed separately according to services rendered.
Modifiers are appended where clinically indicated to reflect unusual circumstances (e.g., increased complexity, discontinued services, unusual anesthesia) per payer rules.

Typical site of service:

Outpatient clinic
Ambulatory surgery center
Physical therapy or rehabilitation facility

Typical patient scenario:

New or reactivated episode of care requiring documentation of episode start for care management, authorization, or DME rental/loaner initiation.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the documented work or complexity substantially exceeds typical for the episode start documentation and payer allows the modifier for evaluation complexity.
`23`	Unusual anesthesia	Use when general anesthesia was required for an associated procedure at episode initiation and is unusual for the service setting.
`52`	Reduced services	Use when the episode start was partially performed or scope was reduced compared with standard documentation (payer-specific).
`53`	Discontinued procedure	Use when initiation of the episode was not completed because the procedure or visit was discontinued for patient safety or other valid reason.
`54`	Surgical care only	Use when billing only the surgical portion of care and the start of the episode pertains to surgical perioperative management.
`55`	Postoperative management only	Use when only postoperative management during the episode is billed separate from surgical care.
`56`	Preoperative management only	Use when only preoperative management is billed at the start of the episode.
`62`	Two surgeons	Use when two surgeons with distinct specialties are required at episode start for initial procedures or planning and payers allow shared payment with modifier `62`.
`AS`	Non‑physician anesthetist	Use when a Certified Registered Nurse Anesthetist provided anesthesia services for an associated procedure at episode initiation.
`CO`	Items or services furnished per CHAMPVA	Use when the beneficiary is covered under CHAMPVA and the episode start is billed under that benefit category.
`CQ`	Service furnished by a CRNA billing independently	Use when a CRNA furnished services independently and the episode start is billed under that provider role where allowed.
`FX`	Fixed prosthesis	Use when the episode start involves documentation related to fixed prosthetic services (dental/prosthetic applications) as applicable.
`FY`	Prosthetic procedures	Use when the episode start documents initiation of care related to prosthetic device fabrication or delivery.
`QK`	Medical direction of two, three, or four CRNAs	Use when medical direction is documented at the episode start for CRNA services.
`QX`	CRNA service with medically directed anesthesia	Use when a CRNA provided service under medical direction documented at episode initiation.

Taxonomy Code	Specialty	Notes
207P00000X	Physical Therapist	Performs evaluation and documents start of rehabilitative episode.
207L00000X	Occupational Therapist	Initiates episodes for occupational therapy interventions and documents care plan.
207ZP0100X	Orthopedic Surgery	Orders and documents episode start for surgical or nonoperative orthopedic care.
261QR0200X	Anesthesiology	Involved when anesthesia is required for an associated procedure at episode initiation.
208M00000X	Family Medicine	Primary care physicians who initiate care episodes and coordinate conservative management plans.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.	Data not available in the input.	Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99203`	Office or other outpatient visit for the evaluation and management of a new patient, typically 30 minutes	Used when a comprehensive new patient E/M visit documents the start of the episode and provides the evaluation supporting `M1111`.
`97161`	Physical therapy evaluation (low complexity)	Often performed at episode initiation to establish baseline function and plan therapy associated with the episode.
`97750`	Physical performance test or measurement (e.g., timed walk)	Performed at the start of an episode to document baseline functional status.
`11042`	Debridement, subcutaneous tissue (example surgical procedure)	May be performed early in an episode of wound care and documented alongside the episode start.
`97001`	Physical therapy evaluation (historical CPT older code)	Historical use; when documented as the initial therapy evaluation it supports episode initiation documentation.

HCPCS Level II M1120: Ongoing Care Not Possible Due to Patient Self-Discharge

HCPCS-M1106-START-OF-EPISODE-OF-CARE

HCPCS M1106: Start of Episode of Care

HCPCS-M1107-DEGENERATIVE-NEUROLOGICAL-DIAGNOSIS-DOCUMENTATION

HCPCS Level II M1107: Documentation of Degenerative Neurological Diagnosis

HCPCS-M1108-HOME-PROGRAM-REFERRAL-CONSULTATION-ONLY

HCPCS M1108: Ongoing Care Not Clinically Indicated; Home Program/Referral/Consult

HCPCS-M1109-ONGOING-CARE-INTERRUPTED-DUE-TO-EARLY-DISCHARGE

HCPCS M1109: Ongoing Care Interrupted Due to Early Discharge

HCPCS-M1110-EARLY-SELF-DISCHARGE-CARE-INTERRUPTED

HCPCS M1110: Ongoing Care Interrupted by Patient Self-Discharge

HCPCS-M1112-DEGENERATIVE-NEUROLOGICAL-DIAGNOSIS-DOCUMENTATION

HCPCS Level II M1112: Documentation of Degenerative Neurological Diagnosis

HCPCS-M1113-ONGOING-CARE-NOT-CLINICALLY-INDICATED-HOME-PROGRAM-REFERRAL-CONSULTATION

HCPCS M1113: Ongoing Care Not Clinically Indicated (Home Program/Referral/Consult)

HCPCS-M1114-CARE-DISCONTINUED-DUE-TO-HOSPITALIZATION-OR-SURGERY

HCPCS M1114: Care Discontinued Due to Hospitalization or Scheduled Surgery

HCPCS-M1115-PATIENT-SELF-DISCHARGE-INTERRUPTED-CARE

HCPCS M1115: Ongoing Care Interrupted by Patient Self-Discharge

Showing 1–10 of 37

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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HCPCS Level II M1111: Start of Episode of Care, Documentation

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Billing Code Overview

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

HCPCS Level II M1111: Start of Episode of Care, Documentation

Sign up for hcpcs M1111 policy alerts

Billing Code Overview

HCPCS Level II M1111: Start of Episode of Care, Documentation

Sign up for hcpcs M1111 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does HCPCS code M1111 represent and where is it typically used?

If I bill M1111, do I also bill evaluation or procedure CPT codes?

Which modifiers are commonly used with M1111 and when should they be applied?

Which payers are referenced for M1111 coverage in this summary?

What clinical workflow and patient scenarios support use of M1111?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does HCPCS code M1111 represent and where is it typically used?

If I bill M1111, do I also bill evaluation or procedure CPT codes?

Which modifiers are commonly used with M1111 and when should they be applied?

Which payers are referenced for M1111 coverage in this summary?

What clinical workflow and patient scenarios support use of M1111?

References