DR. CARL R DUNCAN M.D.
NPI 1700835139
Family Medicine in Siloam Springs, AR
About Dr. Carl R Duncan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CARL R DUNCAN M.D. (NPI 1700835139) is an individual family medicine provider in Siloam Springs, Arkansas, licensed in Arkansas (E2841) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Oklahoma College Of Medicine (1998).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Carl R Duncan M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 72761 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SILOAM SPRINGS, AR 72761
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Carl Duncan's NPI number?
The NPI number for Carl Duncan is 1700835139. It was assigned to this individual provider in the NPPES registry on May 10, 2006.
Where is Carl Duncan located?
Carl Duncan practices at 451 S Holly St, Siloam Springs, AR 72761. The listed phone number is (479) 524-3141.
What is Carl Duncan's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Carl Duncan enrolled in Medicare?
Yes. Carl Duncan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
When was this NPI record last updated?
The NPPES record for Carl Duncan was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Carl R Duncan, M.D. · NPI 1700835139
Family Medicine physician in Siloam Springs, Arkansas. Individual provider, active in the CMS NPPES registry since May 10, 2006.
## Identity
- **NPI:** 1700835139 (Entity type: Individual)
- **Enumerated:** May 10, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** E2841 (Arkansas)
- **Sole proprietor:** No
## Practice location
- **Address:** 451 S HOLLY ST, Siloam Springs, AR 72761-3018
- **Phone:** (479) 524-3141 · **Fax:** (479) 524-3090
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** University Of Oklahoma College Of Medicine, class of 1998
## Record status
- **NPPES last updated:** July 13, 2026
- **Other identifiers:** Other 5L836 (AR)
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Source: [NPI Profile](https://npiprofile.com/npi/1700835139) · Data from the CMS NPPES public registry.