ModifiedmhnPolicy CP.MP.51

Reduction Mammoplasty and Gynecomastia Surgery

Medical necessity criteria, documentation, and coding implications for breast reduction (reduction mammoplasty) and gynecomastia surgery for members/enrollees of the health plans affiliated with Centene Corporation; applies to surgical requests that seek coverage based on specified clinical criteria.

Policy Summary

Payermhn

PolicyReduction Mammoplasty and Gynecomastia Surgery

Policy CodePolicy CP.MP.51

Change TypeMaterial updates to criteria, documentation, and operational clarifications (see changes list).

Effective Date

Next Review Date

Key ActionObtain prior authorization with documentation demonstrating criteria-based medical necessity, including estimated resection weight per Schnur Sliding Scale and evidence of conservative therapy trials.

SourceLink

POLICY UPDATE CHANGES

Added mammogram requirement for members/enrollees < 40 years of age with symptoms of breast cancer or high-risk factors for breast cancer prior to planned reduction mammoplasty.

Criteria updated to include medical director review when estimated resected tissue weight falls below the 22nd percentile of Schnur Sliding Scale minimum cutoff.

Revised gynecomastia timeframes and grade requirements to align with ASPS guidance for adolescents and adults.

Clarifying language added to Criteria I.A., including removal of 'persistent' and 'for at least one year' from Criteria I.A.3, and clarifications regarding breast pain and inframammary folds.

Removed criteria II.A.4. requiring adult testicular size to be attained.

Coding and descriptions reviewed; references reviewed and updated.

2primary procedures referenced (reduction mammoplasty, gynecomastia surgery)

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.

Coverage Criteria

Reduction Mammoplasty: Medical Necessity

Reduction mammoplasty is covered when ALL of the following are met (either A or B):

Age/staging: Member/enrollee is >= 18 years of age OR < 18 years of age and both of the following: i. Tanner stage V; ii. No breast growth equivalent to a change in cup size for at least six monthssee Appendix A for Tanner staging

adolescent-specific growth requirement

Resection weight and symptoms: Estimated amount of breast tissue to be removed meets the minimum weight requirement based on the member/enrollee's body surface area (BSA) per Appendix B (Schnur Sliding Scale); the member/enrollee has at least two specified symptoms affecting activities of daily living; physician documentation shows pain is unresponsive to conservative treatment with documentation of at least two therapeutic measuresSchnur Sliding Scale per Appendix B

If resected tissue weight falls below the 22nd percentile of the Schnur minimum cutoff for BSA, medical director review is required

Gigantomastia of pregnancy (alternative B): Member/enrollee has gigantomastia of pregnancy accompanied by complications (massive infection; significant hemorrhage; tissue necrosis with slough; ulceration of breast tissue; or intertriginous maceration or infection of the inframammary skin refractory to dermatologic measures) and delivery is not imminent

Gynecomastia: Medical Necessity

Gynecomastia surgery is covered when ALL of the following are met for the applicable age group (A or B):

Adolescents <18: One of the following: a. Gynecomastia persists > 1 year after pathological causes are ruled out for unilateral or bilateral grade II or III; b. Gynecomastia persists > 6 months after pathological causes are ruled out for unilateral or bilateral grade IV. AND gynecomastia persists without improvement after appropriate treatment for at least 6 months (including discontinuation of inducing drugs/substances as applicable); AND presence of pain/discomfort due to distention and tightness not responsive to medical management

Adults >=18: Unilateral or bilateral grade III or IV gynecomastia; glandular breast tissue is the primary cause; gynecomastia persists > 3 months after pathological causes are ruled out or > 3 months after unsuccessful medical treatment; gynecomastia persists without improvement after at least 3 months of appropriate treatment (including discontinuation of inducing drugs/substances as applicable); AND presence of pain/discomfort due to distention and tightness not responsive to medical management

Physician Evaluation Criteria

Additional required physician evaluation elements for reduction mammoplasty:

Physician evaluation: Physician documents that pain is unresponsive to conservative treatment with documentation of at least two therapeutic measures (examples include NSAIDs, physical therapy/exercise when skeletal pathology is present, supportive devices such as proper bra support, medically supervised weight loss program, chiropractic or osteopathic manipulative treatment, or orthopedic/spine surgeon evaluation); symptoms are not explained by another diagnosis; and mammogram requirements are followed per age/risk (≥ 40 years: mammogram negative within the year prior to planned procedure; < 40 years: mammogram required if symptoms or high-risk factors) as specified in the policy

The policy explicitly excludes requests that are purely cosmetic by relying on symptom-based medical necessity criteria; removal of the phrase 'for non-cosmetic reasons' was intentional because the listed symptom thresholds (e.g., pain, functional impairment, intertrigo, infection) determine coverage. The document also notes that ICD-10 diagnosis codes were removed from the policy text as part of the recent updates and operational edits.

Criterion II.A.4. requiring attainment of adult testicular size as part of the gynecomastia eligibility assessment has been removed from the criteria set. The change aligns the policy language with current practice guidance and the annual clarifications listed in the revision notes.

Requests that do not meet the policy's specified clinical thresholds may be considered not medically necessary. Examples include failure to meet the required symptom criteria or functional impairment, not meeting the age/Tanner staging requirements for adolescents, estimated resection weight below the Schnur Sliding Scale minimums, or lack of documented trials of required conservative therapies. Absent adequate medical-record documentation of these elements (height/weight for Schnur calculations, conservative therapy attempts, symptom documentation), authorization may be denied.

Coding and Reimbursement

Referenced CPT CodesCPT

19300	Mastectomy for gynecomastia
19318	Breast reduction

Schnur Sliding Scale minimum resection weight per breast — Appendix B

Schnur Sliding Scale (example cutoffs)BSA-linked minimum resection weight per breast; examples from Appendix B: BSA 1.35 -> 199 g; 1.50 -> 260 g; 1.70 -> 370 g; 1.80 -> 441 g

Upper range exampleAppendix B lists increasing gram cutoffs by BSA up to and beyond 1.80; scale used to determine minimum tissue removal per breast

Use in criteriaSchnur minimum per-breast weight is referenced as the threshold for estimated amount of tissue to be removed to meet reduction mammoplasty medical necessity

Provider Actions and Requirements

Prior Authorization

Prior Authorization Required

Prior authorization is required. Submit documentation demonstrating that the request meets the policy's criteria for medical necessity before performing reduction mammoplasty or gynecomastia procedures.

Check applicable Medicare NCDs/LCDs and Coverage Articles for Medicare members prior to applying this policy
Confirm plan-specific prior authorization requirements and effective date before submitting requests

Denial Risk

Denial Risk from Coverage Terms

Coverage decisions are subject to the Health Plan's terms, exclusions, and limitations. Even when clinical criteria are met, eligibility, benefit design, contract exclusions, or state Medicaid provisions may affect payment.

For Medicaid members, state Medicaid provisions supersede this clinical policy when conflicts exist

Background

Reduction mammoplasty (breast reduction) is performed to reduce breast weight and volume with the clinical goal of relieving physical symptoms such as neck, back and shoulder pain, paresthesia, and intertrigo or skin breakdown beneath the breasts. The procedure improves functional limitations caused by breast hypertrophy and may use common surgical approaches such as Wise pattern or vertical pattern reductions.

Definitions and Clinical Staging

Gigantomastia / Macromastia — definition and clinical notes

DefinitionMacromastia/gigantomastia: excessive breast size causing symptoms; gigantomastia of pregnancy is rapid, disproportionate enlargement that can lead to thinning, necrosis, infection, or hemorrhage

When surgery indicatedSurgical intervention (reduction mammoplasty or mastectomy) indicated when conservative measures are ineffective or complications occur (e.g., massive hemorrhage, ulceration, necrosis)

Pregnancy-related noteGigantomastia of pregnancy may require surgery if complications occur and delivery is not imminent

Gynecomastia definition and grading (Appendix C)

DefinitionGynecomastia: benign proliferation of glandular breast tissue in those with a male reproductive system

Grade I

Policy Summary

Payermhn

PolicyReduction Mammoplasty and Gynecomastia Surgery

Policy CodePolicy CP.MP.51

Change TypeMaterial updates to criteria, documentation, and operational clarifications (see changes list).

Effective Date

Next Review Date

SourceLink

On This Page

Documentation Required

Conservative Therapy Requirement

Prior authorization and medical record requests must include evidence that conservative therapies were tried and documented when applicable. Requests without adequate conservative therapy documentation may be considered insufficient.

Document at least two conservative therapeutic measures when required (e.g., NSAIDs, physical therapy, supportive devices, weight loss programs, chiropractic/osteopathic care)
If conservative therapies are applicable, include dates, duration, response to therapy, and treating provider notes

Documentation Required

Required Medical Record Documentation

Medical records must accompany all requests and should include, at a minimum, height and weight (for BSA/Schnur scale calculations), clinical notes, diagnostic studies (e.g., mammogram or X-rays when indicated), and documentation of conservative treatments. Photographs may be requested to support written findings. Incomplete documentation (missing height/weight, lack of conservative therapy documentation, absent diagnostic testing) may result in insufficient information to make a coverage determination.

Include height and weight to allow BSA/Schnur Sliding Scale estimation and documentation of estimated or actual resected tissue weight
Attach physician notes documenting symptoms, duration, and functional impact on activities of daily living
Provide mammogram results when indicated per age/risk criteria; include X-rays if documenting kyphosis