Botulinum toxin prior authorization — chronic migraine, hyperhidrosis, and other uses
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Governs prior authorization information and clinical questions required for medical benefit administration of botulinum toxin for chronic migraine, hyperhidrosis, and other uses for Highmark BlueShield regions. Affects ordering providers, administering facilities, and specialty pharmacies submitting requests.
No material clinical or coverage changes in this revision.
Coverage Criteria for Botulinum Toxin
Chronic Migraine
Covered when ALL of the following are met
Form requests fields to document each element
Hyperhidrosis
Covered when ALL of the following are met
Form asks to describe improvement
Other Indications
Covered when ALL of the following are met
Form provides fields to capture prior therapies and response
Requests for botulinum toxin for chronic migraine are excluded when headaches are attributable to reversible causes such as medication rebound or identifiable lifestyle issues rather than true chronic migraine. The prior authorization form explicitly asks whether headaches are caused by medication rebound or lifestyle factors; an affirmative response indicates the condition may not meet chronic migraine criteria and should be addressed before considering coverage for chronic migraine treatment.
A request may be considered incomplete or may be denied if the submission lacks documentation of required prior therapy trials, specialist involvement when requested, or the member’s treatment history. Specifically, the form requires documentation that the diagnosis meets ICHD-III criteria, confirmation of a persistent three-month headache diary/calendar history, and evidence of trials and failures of at least two prophylactic therapy classes. In addition, if the form indicates that a neurologist or headache specialist prescribed or was consulted, supporting documentation should be included; absence of a trained administrator or missing treatment details (drug, dose, duration, and response) can also render the request incomplete.
Relevant Codes
Provider Actions, Documentation & Prior Authorization
Prior Authorization Required
Prior authorization is required for botulinum toxin injections. Submit a completed prior authorization request form that includes the requested drug (name and HCPCS/J‑code), dose/units, frequency, number of visits, diagnosis (ICD‑10 code(s)), requested start date, and indication‑specific fields. Requests must be submitted prior to initiation of treatment per payer requirements.
- Include drug name and HCPCS/J‑code (e.g., BOTOX J0585; DYSPORT J0586; MYOBLOC J0587; XEOMIN J0588)
- Dose / number of units and frequency
- Number of visits requested
- ICD‑10 diagnosis code(s) and requested start date
- Provider and member identifiers (member name, DOB, member ID/UMI), ordering/attending provider name, NPI, office contact, phone, fax, servicing facility name and NPI
Chronic Migraine Documentation — Denial Risk
For chronic migraine, the prior authorization form must document a persistent 3‑month history of recurring debilitating headaches and include objective documentation such as a headache diary or calendar. Failure to provide the 3‑month headache history, headache diary/calendar, or documentation of prior prophylactic therapy trials (including doses and duration) may result in denial.
- Number of headache days per month, average duration in hours, and duration of the chronic pattern
- Confirm diagnosis per ICHD‑III (yes/no) and whether managed by or in consultation with a neurologist/headache specialist
- Documentation of a 3‑month headache history via diary/calendar is required
- List of prior prophylactic therapies tried from at least two different classes (e.g., antiseizure, beta‑blocker, tricyclic antidepressant), with reason for failure, intolerance, or contraindication and whether prescribed at adequate dose/duration (example benchmark: ~6 weeks)
Required Form Fields & Attachments
The completed prior authorization form must include member and provider identifiers, ICD‑10 code(s), requested start date, the specific drug and HCPCS/J‑code, dose/units, frequency, number of visits requested, and any applicable attachments (evidence of prior therapies, headache diary, objective response measures). Missing required fields or missing attachments increases risk of delayed processing or denial.
- Member name, DOB, member ID (UMI)
- Ordering/attending provider name, NPI, address, office contact, phone, fax
- Servicing facility/vendor name and NPI
- ICD‑10 diagnosis code(s) and requested start date of service
- Drug name and HCPCS/J‑code, dose/units, frequency, number of visits requested
- Indication‑specific fields and attachments (e.g., headache diary for chronic migraine; documentation of severe focal hyperhidrosis and prior topical/systemic therapy trials for hyperhidrosis)
- Attach documentation of prior therapy trials, reasons for failure/intolerance/contraindication, and any objective response measures (e.g., HDSS for hyperhidrosis)
Key Definitions
Background
Chronic migraine is characterized by frequent, disabling headaches and is evaluated using the International Classification of Headache Disorders, Third Edition (ICHD-III). The prior authorization form requests objective documentation of a persistent three-month history of recurrent debilitating headache via a headache diary or calendar to establish frequency and duration. Botulinum toxin injections are administered in the outpatient setting by a healthcare provider trained in botulinum toxin administration; the form also captures whether the request is prescribed by or in consultation with a neurologist or headache specialist as part of medical necessity evaluation.
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