DR. JOHN KERN BUCKNER MD
NPI 1659390136
Internal Medicine - Cardiovascular Disease in Denver, CO
About Dr. John Kern Buckner Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN KERN BUCKNER MD (NPI 1659390136) is an individual cardiovascular disease provider in Denver, Colorado, licensed in Colorado (24339) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. John Kern Buckner Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Buckner reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Denver, CO 80206
- Reassigned Medicare billing, Colorado enrollment
- 281 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80206 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 John Buckner's NPI number?
The NPI number for John Buckner is 1659390136. It was assigned to this individual provider in the NPPES registry on July 18, 2006. The provider is also known as Dr. J Kern Buckner MD.
Where is John Buckner located?
John Buckner practices at 1400 Jackson St, Denver, CO 80206. The listed phone number is (303) 834-7828.
What is John Buckner's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is John Buckner enrolled in Medicare?
Yes. John Buckner is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Buckner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Buckner reassigns Medicare benefits to National Jewish Health (Denver, CO). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Buckner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Buckner was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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. John Kern Buckner, MD · NPI 1659390136
Cardiovascular Disease physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since July 18, 2006.
## Identity
- **NPI:** 1659390136 (Entity type: Individual)
- **Enumerated:** July 18, 2006
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 24339 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 1400 JACKSON ST, Denver, CO 80206-2761
- **Phone:** (303) 834-7828 · **Fax:** (303) 479-7463
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** National Jewish Health (NPI 1326015777, Denver, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 7, 2023
- **Other identifiers:** Other 028890 (CO); Medicaid 01243393 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1659390136) · Data from the CMS NPPES public registry.