JEFFREY J WARREN MD
NPI 1316140627
Internal Medicine in Thornton, CO
About Jeffrey J Warren Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JEFFREY J WARREN MD (NPI 1316140627) is an individual internal medicine provider in Thornton, Colorado, licensed in Illinois (125050254) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, maintains a secondary practice location in Peoria, and is a graduate of Other (2005).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
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
Jeffrey J Warren 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 Jeffrey Warren reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Thornton, CO 80229
- Reassigned Medicare billing, Colorado enrollment
- 101 clinicians in this Medicare group
Greenwood Village, CO 80111
- Reassigned Medicare billing, Colorado enrollment
- Medicare enrollment name: Critical Care & Pulmonary Consultants, P.C.
- 160 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80229 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 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
THORNTON, CO 80229
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 Jeffrey Warren's NPI number?
The NPI number for Jeffrey Warren is 1316140627. It was assigned to this individual provider in the NPPES registry on June 6, 2007.
Where is Jeffrey Warren located?
Jeffrey Warren practices at 8451 Pearl St, Thornton, CO 80229. The listed phone number is (303) 286-5129.
What is Jeffrey Warren's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Jeffrey Warren enrolled in Medicare?
Yes. Jeffrey Warren 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 Jeffrey Warren's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jeffrey Warren reassigns Medicare benefits to 2 organizations: Inpatient Services, PC (Thornton, CO) and Critical Care & Pulmonary Consultants, PC (Greenwood Village, 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 Jeffrey Warren'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 Jeffrey Warren was last updated on November 29, 2022. 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.
# Jeffrey J Warren, MD · NPI 1316140627
Internal Medicine physician in Thornton, Colorado. Individual provider, active in the CMS NPPES registry since June 6, 2007.
## Identity
- **NPI:** 1316140627 (Entity type: Individual)
- **Enumerated:** June 6, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 125050254 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 8451 PEARL ST, Thornton, CO 80229
- **Phone:** (303) 286-5129
## 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): Inpatient Services, PC (NPI 1104413129, Thornton, CO); Critical Care & Pulmonary Consultants, PC (NPI 1033135520, Greenwood Village, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** November 29, 2022
- **Other identifiers:** Other CA4079 (IL); Other P00617110 (IL); Other 809840 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1316140627) · Data from the CMS NPPES public registry.