Critical Doctor on Call
Direct Primary Care in Myrtle Beach, SC
- Facts checked October 27, 2026
- Telehealth
Membership
Family cap
Family membership for up to 6 members
Who it serves
Patients of all ages
Insurance
CDOC does not accept health insurance, co-insurance, or Medicare.
Services
- Executive Memberships
- Wellness Exams
- Problems Focused Consultations
- Acute illness
- Disease management
- Second opinions
- Specialist referral
- Weight Loss Management
- Virtual Health Visits
In-office labs
Members have access to at-cost laboratory testing.
Imaging
Members have access to at-cost imaging services.
Dispensary
Members have access to whole-sale medications.
Telehealth, text and phone
Virtual health visits and tele health appointments are offered.
Hours
| Monday | 09:00 am - 5:00 pm |
|---|---|
| Tuesday | 09:00 am - 5:00 pm |
| Wednesday | 09:00 am - 5:00 pm |
| Thursday | 09:00 am - 5:00 pm |
| Friday | 09:00 am - 5:00 pm |
| Saturday | Closed |
| Sunday | Closed |
Providers
Richard Duff, MD, MD ·
Multi Specialty Medicine
Richard Duff, MD ·
Pulmonary Disease Physician ·
NPI 1447392444
About Critical Doctor on Call
Critical Doctor on Call is a Pure DPC practice in Myrtle Beach, South Carolina. It serves patients of all ages. Its address is 125 Co-Op Rd., Myrtle Beach, SC 29588, in Horry County. Richard Duff, MD, is listed as a provider in Multi Specialty Medicine. Richard Duff, MD, is also listed as a provider with the taxonomy Pulmonary Disease Physician. Services include Wellness Exams, Problems Focused Consultations, Acute illness, and Disease management. Other services include Second opinions, Specialist referral, Weight Loss Management, and Virtual Health Visits. Members have access to at-cost laboratory testing. At-cost imaging services are available to members. Members have access to whole-sale medications. Virtual health visits and tele health appointments are offered. The practice does not accept health insurance, co-insurance, or Medicare.
Area
Horry County, South Carolina
The practice’s location is in a federally designated primary care Health Professional Shortage Area: LI - Horry County (HRSA score 12 of 25, designated May 16, 2016).
Sources
- FAQ — CDOC · criticaldoctoroncall.com/faq · fetched October 27, 2026
- Services — CDOC · criticaldoctoroncall.com/services · fetched October 27, 2026
- About — CDOC · criticaldoctoroncall.com/about · fetched October 27, 2026
- CDOC · criticaldoctoroncall.com · fetched October 27, 2026
- Contact — CDOC · criticaldoctoroncall.com/contact · fetched October 27, 2026
- NPPES NPI Registry · npiregistry.cms.hhs.gov/provider-view/1447392444 · fetched October 27, 2026
- US Census Bureau geocoder · geocoding.geo.census.gov/geocoder · fetched October 27, 2026
- HRSA shortage area data · data.hrsa.gov/tools/shortage-area/hpsa-find · fetched October 27, 2026
Each fact is shown only while it is recent: prices and hours for 180 days after the check, new-patient status for 60, everything else for a year.
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