ISAAC THOMAS WEST HARLEY M.D., PH.D.
NPI 1336568328
Internal Medicine - Rheumatology in Aurora, CO
About Isaac Thomas West Harley M.d., Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ISAAC THOMAS WEST HARLEY M.D., PH.D. (NPI 1336568328) is an individual rheumatology provider in Aurora, Colorado, licensed in Colorado (DR.0058554) and active in the NPI registry since April 2014. He is enrolled in Medicare PECOS and maintains a secondary practice location in Aurora.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Isaac Thomas West Harley M.d., Ph.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Isaac Harley reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Denver, CO 80204
- Reassigned Medicare billing, Colorado enrollment
- 2,259 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 80045 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
AURORA, CO 80045
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 Isaac Harley's NPI number?
The NPI number for Isaac Harley is 1336568328. It was assigned to this individual provider in the NPPES registry on April 7, 2014.
Where is Isaac Harley located?
Isaac Harley practices at 1775 Aurora Ct, Aurora, CO 80045. The listed phone number is (303) 724-6031.
What is Isaac Harley's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Isaac Harley enrolled in Medicare?
Yes. Isaac Harley is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Isaac Harley's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Isaac Harley reassigns Medicare benefits to Denver Health And Hospital Authority (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 Isaac Harley'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 Isaac Harley was last updated on June 15, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Isaac Thomas West Harley, M.D., PH.D. · NPI 1336568328
Rheumatology physician in Aurora, Colorado. Individual provider, active in the CMS NPPES registry since April 7, 2014.
## Identity
- **NPI:** 1336568328 (Entity type: Individual)
- **Enumerated:** April 7, 2014
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** DR.0058554 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 1775 AURORA CT, Aurora, CO 80045-2536
- **Phone:** (303) 724-6031
## 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:** Denver Health And Hospital Authority (NPI 1477569838, Denver, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 15, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1336568328) · Data from the CMS NPPES public registry.