Cornerstone DPC
Quick Facts
| Membership Price Range | Ages newborn to 18: $25/month each child | Ages 18 and up: $75/month | Couple with one child: $170/month | Couple with two or more children: $180/month | Re-enrollment fee: $200 | No enrollment fee, no cancellation fee |
| Practice Type | Direct Primary Care |
| Location | Effingham, Decatur |
| Doctors | Scott Sieberg MD, Family Medicine |
| Telehealth Type | Telemedicine appointments |
| Telehealth Available | Yes |
About
At Cornerstone DPC, Dr. Scott Sieberg delivers direct primary care and functional medicine from his Effingham, Illinois office. He brings over 25 years of primary care experience to a practice built on thorough, relationship-driven medicine. Members pay a flat monthly fee with no insurance involvement, no co-pays, and no deductibles.
Dr. Sieberg holds certification from the Institute for Functional Medicine and serves as a certified practitioner of the Bredesen Protocol for Alzheimer's prevention and treatment. He draws labs in-office with same to next-day results at lower cost than outside labs. The practice offers 24/7 access, same-day appointments, and telemedicine visits. Patients who prefer a standalone functional medicine consultation can book individual appointments outside the membership. Dr. Sieberg also provides FLCCC Alliance-based Covid-19 treatment and specialized care for long-haul Covid syndrome.
Details
Address
1901 South 4th St, Suite 27, Effingham, IL 62401
Phone
(217) 809-0771Website
Visit websiteMembership
$75/monthly
Membership Details
Flat monthly membership fee with no enrollment fee and no cancellation fee. Adults $75/month, children newborn to 18 years $25/month each. Couple with one child $170/month, couple with two or more children $180/month. Re-enrollment fee: $200. Functional medicine first visit: $250 for first 60 minutes, $75 for each additional 30 minutes. Follow-up: $150 for first 60 minutes, $50 for each additional 30 minutes. Follow-up coaching sessions $50 for 60 minutes. Covid visits: $125 including four weeks of follow-up.
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Frequently Asked Questions
Adult membership at Cornerstone DPC costs $75 per month. Children from newborn through age 18 pay $25 per month each. A couple with one child pays $170 per month, and a couple with two or more children pays $180 per month. Cornerstone DPC charges no enrollment fee and no cancellation fee.
Cornerstone DPC does not accept insurance or involve any third-party billing. Patients pay a flat monthly membership fee directly to the practice. This eliminates co-pays, deductibles, and billing surprises. Patients may still carry insurance for hospitalizations or specialist care outside the practice.
Yes. Cornerstone DPC offers same-day appointments and 24/7 access to Dr. Sieberg. The practice keeps its patient panel to roughly one-quarter the size of a typical family physician's panel, which supports fast access and longer visits.
Yes. Dr. Sieberg offers telemedicine appointments for patients who need remote visits. This complements the in-person care available at the Effingham office.
Yes. Dr. Sieberg draws labs in-office and delivers results the same day or the next day. The cost runs lower than outside laboratories. Medications may also be available on-site, saving patients additional time and expense.
Yes. Cornerstone DPC offers individual functional medicine appointments for patients who prefer not to join as monthly members. A first visit of 60 minutes costs $250. Follow-up visits run $150 for the first 60 minutes. Follow-up coaching sessions cost $50 for 60 minutes.
Cornerstone DPC charges $125 for a Covid-19 visit, which includes four weeks of follow-up care. Dr. Sieberg applies FLCCC Alliance-based protocols covering prevention, acute infection, and long-haul syndrome.
Cornerstone DPC charges a $200 re-enrollment fee for patients who cancel their membership and later wish to rejoin. The practice charges no initial enrollment fee and no cancellation fee.
Cornerstone DPC provides family medicine, functional medicine, preventive care, chronic disease management, and specialized Covid-19 and long-haul Covid treatment. Dr. Sieberg also holds certification in the Bredesen Protocol for Alzheimer's prevention. The practice addresses conditions including diabetes, hypertension, thyroid disorders, autoimmune conditions, digestive disorders, and more.
com. The office is located at 1901 South 4th Street, Suite 27, Effingham, IL 62401. The contact page on the practice website directs new patients to call rather than submit a registration form online.
Practice last updated April 11, 2026