OFFICE INFORMATION

Office Hours
Monday - Thursday:  8:30 AM - 5:00 PM
Friday:  8:30 AM - 4:00 PM 

Note: Our phones turn off at 4:40 PM Monday - Thursday, and 3:55 PM on Friday.
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Dr. Harrahill: (314) 525-4973 

Dr. Naidu: (314) 525-4970 

To provide exceptional care to each patient, a scheduled appointment is required. Please call our office to schedule an appointment. 

Canceling appointments: 
Please provide our office with 24 hours (advance) notice for appointment cancellations.

Exchange: (314) 364-5265

For life-threatening situations, call 911 or proceed to the nearest emergency room.

If you need to reach a physician after regular business hours (for an urgent issue), contact the physician’s exchange and speak with the physician on call. Please have your pharmacy's telephone number available if medication is required.

Note: Your personal physician may not be on call and refills or antibiotics will not be provided after regular business hours.

To facilitate medication refills, please have your pharmacy fax your refill request.

Fax: (314) 525-4972

We make every effort to expedite refill requests; however, please make refill requests with your pharmacy a few days prior to depletion.


To ensure our providers accept your insurance plan, please verify coverage by contacting your insurance provider’s customer service department. Customer service contact information is typically listed on the reverse side of your insurance card.

Prior to services rendered it is important to review insurance information with our staff; therefore, please have your insurance card available during each office visit.

Dr. Harrahill: (314) 525-4973

Dr. Naidu: (314) 525-4970

Note: It is the patient’s responsibility to obtain referral authorization before visiting a specialist.

If your insurance company requires a referral for a procedure or specialist, please call the referral line. We request 5 business days advance notice to fulfill referral requests.


Most referrals are managed over the phone, and upon completion will be faxed to the appropriate provider/specialist. To expedite your referral and ensure our office is submitting to the appropriate physician or facility, please have the following information:

1) First and last name of the provider/specialist
2) Type of provider/specialist
3) Reason for visit
4) Date & time of appointment
5) Phone and fax number

We make every effort to contact you within a reasonable time regarding your test results. If you have not heard from our office within two weeks from the date of service, please contact our office.

In an effort to contact you and provide important services, please notify our office with any changes in name, address, phone number, pharmacy, or insurance information.


Co-payments are due at time of check-in (no exceptions). If you do not have your co-payment, you will be required to reschedule your appointment. We accept debit cards, credit cards, cash and checks. Please present your insurance card at time of payment.

Per St. Anthony’s Physician Organization (SAPO) and our Central Billing Office (CBO), returned checks have a $30.00 fee applied.

Fee: $25.00

Note: A $25.00 fee is collected prior to the return or distribution of paperwork. Please allow up to 10 business days for completion of forms. collected prior to the return or distribution of paperwork. Please allow up to 10 business days for completion of forms.