Your Go-To Peptide Billing Code Reference
Having the right billing codes at your fingertips saves time, reduces errors, and speeds up reimbursement. For peptide telemedicine providers, finding the correct codes can be frustrating because many peptides lack dedicated billing codes.
This reference guide organizes the codes you need most into one easy-to-use resource. Bookmark this page and share it with your billing team for quick daily reference.
We cover E/M codes for telemedicine visits, HCPCS codes for peptide products, ICD-10 diagnosis codes commonly used with peptide therapy, and the modifiers required for telemedicine claims. Let us start with the codes you will use most often.
Jeffrey Bendix, Senior Editor, Medical Economics: "The lack of specific HCPCS codes for compounded peptides remains one of the biggest barriers to clean claims submission in this space"
Evaluation and Management (E/M) Codes for Telemedicine
E/M codes are the foundation of every peptide therapy telemedicine claim. These codes describe the level of service provided during the patient encounter.
New Patient Visits (99201-99205): Code 99202 covers a straightforward new patient visit with low medical decision-making complexity. Code 99203 is for low-to-moderate complexity, 99204 for moderate complexity, and 99205 for high complexity involving multi-peptide protocols or complex medical histories.
Established Patient Visits (99211-99215): Code 99212 covers a straightforward follow-up visit. Code 99213 is the most commonly used code for peptide therapy follow-ups involving dosage adjustments. Code 99214 is for moderate complexity visits, and 99215 is for high complexity visits with extensive decision-making.
Telehealth-Specific E/M Codes: Codes 99441 to 99443 cover telephone-only E/M services when video is not used. Code 99441 is for 5 to 10 minutes, 99442 for 11 to 20 minutes, and 99443 for 21 to 30 minutes of phone consultation.
Code 99213 is the workhorse code for peptide therapy telemedicine practices. It covers the majority of established patient follow-up visits where dosing is adjusted or labs are reviewed with straightforward decision-making.
Claims submitted with unclassified drug code J3490 are flagged for manual review by most payers, adding 15 to 30 days to the typical reimbursement timeline.
HCPCS Codes for Peptide Products
HCPCS codes identify the specific peptide product being prescribed or administered. This is where peptide billing gets tricky because most compounded peptides do not have dedicated codes.
Miscellaneous Drug Codes: J3490 (Unclassified drugs) is the most commonly used code for compounded peptides like BPC-157, thymosin alpha-1, and CJC-1295. J3590 (Unclassified biologics) is used when the peptide qualifies as a biological product rather than a drug.
Growth Hormone-Related Codes: J2941 covers somatropin injection. J1826 covers interferon beta-1a, which is sometimes relevant for peptide practices that also prescribe related therapies.
Administration Codes: 96372 covers therapeutic, prophylactic, or diagnostic injection (subcutaneous or intramuscular). 96365 to 96368 cover intravenous infusion codes if peptides are administered via IV in supervised settings.
When using J3490 or J3590, always include the following in the claim description: the peptide name, strength, dosage, route of administration, and NDC number if available. This information is required for the payer to process the claim.
CMS reviews and updates HCPCS codes quarterly. New peptide-specific codes may be added as peptide therapies gain wider acceptance. Check the HCPCS quarterly updates to see if your commonly prescribed peptides have received dedicated codes.
ICD-10 Diagnosis Codes for Peptide Therapy
Diagnosis codes establish the medical necessity for the peptide therapy being prescribed. Using the most specific ICD-10 code available strengthens your claim and reduces the chance of denial.
Musculoskeletal and Tissue Repair (commonly used with BPC-157): M79.3 covers panniculitis, unspecified. M79.1 covers myalgia. M77.9 covers enthesopathy, unspecified. M62.81 covers muscle weakness (generalized). T14.8 covers other injuries of unspecified body region.
Endocrine and Metabolic (commonly used with growth hormone peptides): E23.0 covers hypopituitarism. E34.3 covers short stature due to endocrine disorder. R63.6 covers underweight. E88.9 covers metabolic disorder, unspecified.
Immune System (commonly used with thymosin alpha-1): D84.9 covers immunodeficiency, unspecified. D89.9 covers disorder involving immune mechanism, unspecified. R53.83 covers other fatigue.
General Symptoms: R53.1 covers weakness. R53.81 covers other malaise. R63.4 covers abnormal weight loss. G47.9 covers sleep disorder, unspecified.
Always use the most specific ICD-10 code that matches the patient's documented condition. Unspecified codes (those ending in .9) are more likely to trigger medical necessity denials than specific codes that pinpoint the exact condition.
Telemedicine Modifiers
Modifiers tell the payer that the service was delivered via telemedicine. Missing or incorrect modifiers are the number one cause of peptide telemedicine claim denials.
Modifier 95: Synchronous telemedicine service rendered via real-time interactive audio and video telecommunications system. This is the most widely accepted telemedicine modifier.
Modifier GT: Via interactive audio and video telecommunications systems. Some payers require GT instead of 95, so check each payer's requirements.
Modifier FQ: Telehealth service furnished using audio-only communications technology. Use this when a video visit is not possible and the payer allows audio-only billing.
Modifier 93: Synchronous telemedicine service rendered via telephone or other real-time interactive audio-only telecommunications system. Some Medicare Administrative Contractors use this instead of FQ.
Place of Service Codes
Place of Service (POS) codes indicate where the service was delivered. For telemedicine, the POS code works in combination with the modifier to identify the encounter as a virtual visit.
POS 02: Telehealth provided other than in patient's home. Use this when the patient is at a clinic, office, or other healthcare facility during the telemedicine visit.
POS 10: Telehealth provided in patient's home. Use this when the patient connects from their home, which is the most common scenario for peptide therapy telemedicine visits.
POS 11: Office. Some payers still require POS 11 with a telemedicine modifier instead of POS 02 or 10. Always verify the payer's preference before submitting.
When billing J3490 for compounded peptides, always attach the NDC number, drug name, dosage, and route of administration in Box 19 or the electronic equivalent to reduce denial rates significantly.
Code Combinations for Common Peptide Scenarios
Here are ready-to-use code combinations for the most common peptide telemedicine encounters. These examples give your billing team a starting point for each visit type.
BPC-157 New Patient Consultation (Video): 99204 with modifier 95, POS 10, ICD-10 M77.9 or relevant musculoskeletal code, plus J3490 with documentation specifying BPC-157, dosage, and route.
Growth Hormone Peptide Follow-Up (Video): 99213 with modifier 95, POS 10, ICD-10 E23.0 or relevant endocrine code, plus J3490 with documentation specifying the peptide name and dosage.
Thymosin Alpha-1 Initial Visit (Video): 99205 with modifier 95, POS 10, ICD-10 D84.9, plus J3490 with documentation specifying thymosin alpha-1, dosage, and route.
Phone-Only Dosing Adjustment: 99442 with modifier FQ, POS 10, relevant ICD-10 code. No drug code is needed if no new prescription is issued. For additional context, the CMS HCPCS coding resources offers relevant guidance on this topic.
Creating pre-built code combination templates in your billing software reduces coding time by up to 50% and improves first-pass acceptance rates. Most practice management systems allow you to save custom code sets for common encounter types.
Codes That Require Special Documentation
Some codes trigger extra scrutiny from payers and require additional documentation to support the claim. Knowing which codes need extra attention helps your team prepare.
J3490 and J3590 always require a detailed description of the drug, including the name, strength, dosage, route, and NDC. Without this information, the claim will be denied or pended for additional information.
High-level E/M codes (99205 and 99215) require documentation that clearly supports high medical decision-making complexity. The note must address multiple conditions, extensive data review, or high-risk management decisions.
Modifier 25 is sometimes needed when a significant, separately identifiable E/M service is provided on the same day as a procedure. If your peptide therapy visit includes both a consultation and an injection administration, modifier 25 on the E/M code may be required.
Keeping Your Code Reference Current
Billing codes change regularly, and using outdated codes results in automatic denials. Your code reference sheet should be a living document that is updated at least quarterly.
Subscribe to CMS HCPCS quarterly updates, AAPC coding newsletters, and your MAC (Medicare Administrative Contractor) bulletins. These sources publish code changes before they take effect.
Assign one person on your billing team to own the code reference update process. They should review updates as they are published and communicate changes to the rest of the team immediately.
How to Use This Reference Guide
Print this guide or save it as a PDF for your billing team's daily reference. Having codes readily available reduces the time spent looking up codes and minimizes errors from memory-based coding.
Cross-reference this guide with your payer-specific requirements. Some payers have unique coding rules that override general guidelines, so always check the payer's provider manual.
Use this guide as a training tool for new billing staff and virtual assistants. Walking through each code category with a new team member accelerates their onboarding and builds their confidence in peptide billing.
Accurate use of E/M codes paired with detailed documentation on unclassified peptide drug codes (J3490/J3590) is the single biggest factor in reducing claim denials for telemedicine peptide practices.
Frequently Asked Questions
What HCPCS code do I use for BPC-157?
BPC-157 does not have a dedicated HCPCS code. Use J3490 (unclassified drugs) with a detailed description including the drug name, strength, dosage, route of administration, and NDC number in the claim notes.
Which telemedicine modifier should I use, 95 or GT?
It depends on the payer. Most commercial payers accept modifier 95, but some still require modifier GT. Medicare generally uses modifier 95. Check each payer's telemedicine billing guidelines to confirm which modifier they require.
Do I need a different Place of Service code if the patient is at home versus a clinic?
Yes. Use POS 10 when the patient is at home and POS 02 when the patient is at another healthcare facility or telehealth originating site. Some payers have specific preferences, so verify before submitting.
How do I code a peptide therapy visit that includes both a consultation and self-injection training?
Bill the E/M code for the consultation with the appropriate telemedicine modifier. Self-injection training is typically included in the E/M visit and not billed separately unless the payer has a specific code for patient education services.
What ICD-10 code should I use for peptide therapy for general wellness?
Payers generally do not cover services billed for "general wellness." Tie the peptide therapy to a specific, documented medical condition using the most specific ICD-10 code available. Codes like R53.83 (other fatigue) or R63.4 (abnormal weight loss) connect the therapy to a recognized symptom.
Get Expert Coding Support for Your Practice
Accurate coding is the foundation of clean claims and strong collections. PeptideStaff provides billing specialists and virtual assistants who know these codes inside and out and stay current on every update.
Stop losing revenue to coding errors. Contact PeptideStaff today to add peptide billing coding expertise to your telemedicine practice.
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Dr. Michael Torres
Healthcare Staffing Consultant
MD, Healthcare Administration | 11 years in clinical staffing
Former physician turned healthcare staffing specialist. Advises peptide clinics and regenerative medicine practices on credentialing, provider placement, and team structure.
Reviewed by Dr. Michael Torres, MD, April 2026