IAN OSBORNE COOK ARMSTRONG MD
NPI 1053949842
Surgery - Vascular Surgery in Houston, TX
About Ian Osborne Cook Armstrong Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IAN OSBORNE COOK ARMSTRONG MD (NPI 1053949842) is an individual vascular surgery provider in Houston, Texas, licensed in Texas (W4788) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ian Osborne Cook Armstrong Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ian Cook Armstrong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Houston, TX 77030
- Reassigned Medicare billing, Texas enrollment
- 3,111 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 77024 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.
HOUSTON, TX 77024
HOUSTON, TX 77024
HOUSTON, TX 77024
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 Ian Cook Armstrong's NPI number?
The NPI number for Ian Cook Armstrong is 1053949842. It was assigned to this individual provider in the NPPES registry on March 29, 2020.
Where is Ian Cook Armstrong located?
Ian Cook Armstrong practices at 915 Gessner Rd, Houston, TX 77024. The listed phone number is (713) 486-5100.
What is Ian Cook Armstrong's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Vascular Surgery, with taxonomy code 2086S0129X.
Is Ian Cook Armstrong enrolled in Medicare?
Yes. Ian Cook Armstrong is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ian Cook Armstrong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ian Cook Armstrong reassigns Medicare benefits to Ut Physicians (Houston, TX). 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 Ian Cook Armstrong'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 Ian Cook Armstrong was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days 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.
# Ian Osborne Cook Armstrong, MD · NPI 1053949842
Vascular Surgery physician in Houston, Texas. Individual provider, active in the CMS NPPES registry since March 29, 2020.
## Identity
- **NPI:** 1053949842 (Entity type: Individual)
- **Enumerated:** March 29, 2020
- **Primary specialty:** Surgery - Vascular Surgery · taxonomy 2086S0129X
- **State license:** W4788 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 915 GESSNER RD, Houston, TX 77024-2527
- **Phone:** (713) 486-5100
## 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:** Ut Physicians (NPI 1033157821, Houston, TX), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** September 29, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1053949842) · Data from the CMS NPPES public registry.