PNI building exterior

Schedule a Second Opinion

If you believe you are experiencing a medical or life-threatening emergency Call 911 immediately.

Do not rely on communication through this website for urgent medical needs.


Schedule a second opinion, consultation or record review via phone or online:

If possible, please provide us with your most recent medical records including diagnostic imaging (e.g., MRI, CT), blood tests and prior consultations; your information can be uploaded, faxed, emailed or mailed to our office. Please upload your CT and MRI images electronically to our secure server for our physicians to view.

Virtual Visits

In these uncertain times, we’re making it easy and safe to talk to your PNI doctor from your home using Zoom technology on your smartphone, tablet or computer. Telemedicine consultations are available. Learn more about virtual visits.

Contact Us Via Phone

Neurosurgical Consultations

Office of Drs. Walavan Sivakumar, JP Langevin and Jian Guan: 424-212-5361

Contact Us Online

For a consultation or review of your records, please complete the form below. We will respond to you by email or a phone call within 12-24 hours.

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Securely upload your images and medical records

For a consultation or review of your records, please complete the form below. We will respond to you by email or a phone call within 12-24 hours.