PubChem Reference: View compound profile on NIH PubChem Key Characteristics MOLECULAR PROFILE Formula: C 78 H 123 N 23 O 23 S 2 Weight: 1815.12 g/mol CAS: 221231-10-3 Origin: hGH 177-191 + N-terminal tyrosine Structure: Modified peptide with disulfide bridge PHYSICAL PROPERTIES Form: White to off-white lyophilized powder Solubility: Readily soluble in water Stability: Excellent with disulfide bridge Storage: Keep refrigerated 3646 F (28 C) Related products Epithalon $45.00 $140.00Price range: $45.00 through $140.00 NAD+ $40.00 $125.00Price range: $40.00 through $125.00
Here's the appeal workflow that gets results: Pull the ERA or EOB and identify the exact CARC and RARC codes for the denial Match the CARC code to the denial table above to confirm the root cause Gather supporting documentation: Clinical notes showing injection administration Drug name, dose, route, and anatomical site Prescribing physician's order Prior authorization approval number, if applicable Correct the claim line if the denial stems from a billing error such as a missing modifier, wrong POS, or missing NDC Write the appeal letter citing the specific payer policy, CMS guideline, or NCCI rule that supports separate payment Submit the corrected claim or formal appeal within the payer's timely filing limit Track the appeal with an expected resolution date so it doesn't age out Per CMS appeals process guidance , documentation supporting the clinical necessity of the service is the most critical component of a successful appeal
Furthermore, the treatment with NMN resulted in a significant upregulation of adipose triglyceride lipase (ATGL) expression in subcutaneous fat, which is in line with the observed alterations in fat mass and adipocyte size (Imi et al., 2023)
Key Facts About CPT 64450 Service type: Therapeutic/diagnostic procedure (injection) Procedure: Peripheral nerve or branch injection Medication: Local anesthetic/steroid (reported separately if applicable) Guidance: May be performed with or without imaging (e.g., ultrasound) Setting: Office, outpatient, or facility Provider type: Physicians and qualified healthcare professionals Common clinical indications: Acute or chronic pain management Diagnostic nerve blocks to identify pain source Neuropathic pain conditions Musculoskeletal pain syndromes Pre- or post-procedural anesthesia When to Use CPT 64450 CPT 64450 is appropriate when: Injecting an anesthetic agent into a peripheral nerve or branch The nerve targeted does not have a more specific CPT code The procedure is performed for diagnostic or therapeutic purposes The injection is medically necessary for pain management or evaluation Examples: Peripheral nerve block for localized pain not tied to a named nerve code Diagnostic injection to determine the source of neuropathic pain Local anesthetic injection for minor procedures or pain relief Treating focal nerve-related pain syndromes Documentation Requirements To support CPT 64450 billing, documentation should include: Patient identifiers and date of service Clinical indication for the injection Specific nerve or anatomical site targeted Medication used, dosage, and concentration Technique (including whether imaging guidance was used) Laterality (if applicable) Patient response and tolerance Post-procedure instructions and follow-up Provider signature and credentials Clear identification of the nerve/branch treated is essential for accurate coding
It should be durable and long-lasting
