Ryan Armstrong, MD
NPI 1154453355 · Vascular & Interventional Radiology Physician · Shenandoah, TX
Enrolled with Medicare as Practitioner - Interventional Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Armstrong, MD is a Vascular & Interventional Radiology Physician provider in Shenandoah, TX (NPI 1154453355).
Provider details
- NPI number
- 1154453355
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- M3868 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
605 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 118 | $173 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 96 | $86 |
| Destruction of First Incompetent Vein of Arm Or Leg Using Radiofrequency and Imaging Guidance36475 | 73 | $992 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 56 | $160 |
| X-Ray of Chest, 1 View71045 | 52 | $8 |
| Injection of Chemical Agent Into Multiple Incompetent Veins of Same Leg Using Ultrasound Guidance36466 | 45 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$110 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 7619 Branford Pl Ste 230Sugar Land, TX 77479-1104Phone: (713) 575-3686
Registry dates
- Enumerated
- 2007-03-12
- Last updated
- 2025-02-07
- Certified
- 2025-02-07
Frequently asked questions
- What is Ryan Armstrong's NPI number?
- Ryan Armstrong's National Provider Identifier (NPI) is 1154453355, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Armstrong's specialty?
- Ryan Armstrong is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Armstrong located?
- Ryan Armstrong's practice location on file with NPPES is 8850 Six Pines Dr Ste 280, Shenandoah, TX 77380-2683.
- What is Ryan Armstrong's phone number?
- The practice phone number listed in the NPPES registry for Ryan Armstrong is (713) 597-8535.
- Does Ryan Armstrong accept Medicare?
- Ryan Armstrong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Armstrong's NPI active?
- Yes — Ryan Armstrong's NPI (1154453355) is active in the NPPES registry as of the last update on 2025-02-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.