IVOR S DOUGLAS MD
NPI 1881617173
Internal Medicine - Critical Care Medicine in Denver, CO
About Ivor S Douglas Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IVOR S DOUGLAS MD (NPI 1881617173) is an individual critical care medicine provider in Denver, Colorado, licensed in Colorado (41063) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Westchester Medical Center, and is a graduate of Other (1990).
NPPES Registry Identity
Specialties & Licenses 2
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 and accepts Medicare assignment
Ivor S Douglas 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 Ivor Douglas reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denver, CO 80204
- Reassigned Medicare billing, Colorado enrollment
- 2,259 clinicians in this Medicare group
Valhalla, NY 10595
- Reassigned Medicare billing, New York enrollment
- 1,663 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 2
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Westchester Medical Center
Acute Care Hospitals · Valhalla, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80204 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.
DENVER, CO 80204
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 Ivor Douglas's NPI number?
The NPI number for Ivor Douglas is 1881617173. It was assigned to this individual provider in the NPPES registry on July 26, 2006.
Where is Ivor Douglas located?
Ivor Douglas practices at 777 Bannock St Mc 7782, Denver, CO 80204. The listed phone number is (303) 436-6000.
What is Ivor Douglas's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Ivor Douglas enrolled in Medicare?
Yes. Ivor Douglas 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 Ivor Douglas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ivor Douglas reassigns Medicare benefits to 2 organizations: Denver Health And Hospital Authority (Denver, CO) and Westchester Medical Center Advanced Physician Services PC (Valhalla, NY). 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 Ivor Douglas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Ivor Douglas affiliated with any hospitals?
According to CMS data, Ivor Douglas is affiliated with Westchester Medical Center.
When was this NPI record last updated?
The NPPES record for Ivor Douglas was last updated on March 2, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Ivor S Douglas, MD · NPI 1881617173
Critical Care Medicine physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since July 26, 2006.
## Identity
- **NPI:** 1881617173 (Entity type: Individual)
- **Enumerated:** July 26, 2006
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 41063 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 777 BANNOCK ST, MC 7782, Denver, CO 80204-4507
- **Phone:** (303) 436-6000
## 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): Denver Health And Hospital Authority (NPI 1477569838, Denver, CO); Westchester Medical Center Advanced Physician Services PC (NPI 1740687458, Valhalla, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1990
## Record status
- **NPPES last updated:** March 2, 2021
- **Other identifiers:** Medicaid 16828534 (CO); Other P00128141 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1881617173) · Data from the CMS NPPES public registry.