Owner & Office Administrator

Renee Garza, Owner


Renee Garza began her medical billing career in 1987 with Dr. Jean Holt. She billed for 3 physicians one of which was Otolaryngology. After 18 years of office billing she decided to venture out and start her own company. In 2006 she opened Advanced Billing and Consulting Services. In the billing industry Ophthalmology is one of the most difficult specialties to bill. She wanted to give ophthalmologists a source for competent and thorough ophthalmic medical billing. Advanced Billing and Consulting currently bills for Ophthalmology, Dermatology and Otolaryngology. Renee has been married to her husband Bob for over 20 years and has a son and daughter. On the weekends she likes to spend time on her ranch riding her horses. You can contact Renee at

Daven Sarsfield, Office Administrator


Daven has been with Advanced Billing and Consulting since 2006. She started in the medical field as an insurance verifier in 2001. She understands insurance benefits inside and out, and knows what is needed in order to ensure that the provider is reimbursed at the highest level possible. Daven is currently our office administrator; she is in direct contact with the physicians to keep them abreast of their account. If you have any questions for Daven please send an email to

Contact Us

Physical Address

Advanced Billing & Consulting
463 Anderson Hl
Seguin, TX 78155


Mailing Address

PO Box 1198

Seguin, TX 78156



Phone: 830-379-9600

Toll Free: 877-518-3937

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