AARON J CALDERON MD
NPI 1124075353
Internal Medicine in Denver, CO
About Aaron J Calderon Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AARON J CALDERON MD (NPI 1124075353) is an individual internal medicine provider in Denver, Colorado, licensed in Colorado (40910) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of State University Of Ny Upstate Medical University (1993).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Aaron J Calderon Md 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.
Medicare Billing Reassignments
2Medicare enrollment records show Aaron Calderon reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denver, CO 80218
- Reassigned Medicare billing, Colorado enrollment
- 114 clinicians in this Medicare group
Denver, CO 80218
- Reassigned Medicare billing, Colorado enrollment
- 90 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 80218 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 2
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 Aaron Calderon's NPI number?
The NPI number for Aaron Calderon is 1124075353. It was assigned to this individual provider in the NPPES registry on May 31, 2006.
Where is Aaron Calderon located?
Aaron Calderon practices at 1960 Ogden St Ste 400, Denver, CO 80218. The listed phone number is (303) 318-1540.
What is Aaron Calderon's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Aaron Calderon enrolled in Medicare?
Yes. Aaron Calderon 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.
Which organizations bill Medicare for Aaron Calderon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Calderon reassigns Medicare benefits to 2 organizations: Saint Joseph Hospital Inc (Denver, CO) and Uptown Community Health Center Inc (Denver, CO). Each 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 Aaron Calderon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Aaron Calderon accept?
Health plans from Select Health and UnitedHealthcare list Aaron Calderon as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Aaron Calderon was last updated on July 21, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Aaron J Calderon, MD · NPI 1124075353
Internal Medicine physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since May 31, 2006.
## Identity
- **NPI:** 1124075353 (Entity type: Individual)
- **Enumerated:** May 31, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 40910 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 1960 OGDEN ST STE 400, Denver, CO 80218-1022
- **Phone:** (303) 318-1540 · **Fax:** (303) 318-2481
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Saint Joseph Hospital Inc (NPI 1891220661, Denver, CO); Uptown Community Health Center Inc (NPI 1487432019, Denver, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of Ny Upstate Medical University, class of 1993
## Record status
- **NPPES last updated:** July 21, 2011
- **Other identifiers:** Medicaid 53188268 (CO); Medicare UPIN G42606; Medicare PIN C484718 (CO); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1124075353) · Data from the CMS NPPES public registry.