Ryan N. Armstrong, MD
Vascular & Interventional Radiology Physician · Shenandoah, TX
Ryan N. Armstrong, MD is a vascular & interventional radiology physician with a practice address in Shenandoah, Texas, and NPI 1154453355, issued on Mar 12, 2007. Check the license (Texas M3868, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Ryan N. Armstrong
- Credential
- MD
- Primary taxonomy
- Vascular & Interventional Radiology Physician 2085R0204X
- License number
- M3868 TX
Self-reported in NPPES; status is on the state search - Practice location
- 8850 Six Pines Dr Ste 280, Shenandoah, TX 77380
- Phone
- (713) 597-8535
- Enumerated
- Mar 12, 2007
- Record last updated
- Feb 7, 2025
- Fax
- (713) 575-3688
- Medicare enrollment
- Enrolled (PECOS I20090504000407); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2003
- Entity
- Type 1 · individual
8 nearest vascular & interventional radiology physician records → All 324 in Texas → Look up another NPI →
Verify Ryan N. Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M3868Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average vascular & interventional radiology physician in 2024
33 Medicare Part D claims for 13 beneficiaries, against an average of 75 among the 1,444 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 83.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $110.23
2 payments; by number, the most common kind was food and beverage; the largest payer was Asahi Intecc USA, Inc. The 3,457 providers of this specialty with any payment received $7,206.73 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Singleton Associates PAFriendswood, TX
- Texas Endovascular Associates PLLCShenandoah, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ryan N. Armstrong among 324 vascular & interventional radiology physician records in Texas
Ryan N. Armstrong, MD is one of 324 vascular & interventional radiology physician records with a practice address in Texas. 94% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 27% of them.
- NPI issued2007 · 27% of these records are older, 63% newer
- In a Medicare fileYes · 94% of these records are
- In the CMS Doctors and Clinicians fileYes · 88% of these records are
- Graduated2003 · median 2008 among the 284 with a school on file
- Record last updated2025 · 33% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0204X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Vascular & Interventional Radiology Physician providers in Texas
There are 324 vascular & interventional radiology physician records in Texas.
All 324 in Texas → Every provider in Shenandoah → Vascular & Interventional Radiology Physician nationwide →
The 8 vascular & interventional radiology physician records with the nearest ZIP codes
- Nabih DiabShenandoah, TX 773801437655834
- Shawn Hobby, M.D.Shenandoah, TX 773801386030021
- Jay Radhakrishnan, M.D.The Woodlands, TX 773801245266972
- Mohammad Hussain, D.O., MSSpring, TX 773891801328414
- Adeel Shahid, M.D.Spring, TX 773891851686158
- William Fox, MDBellaire, TX 774011437367042
- Eric Hardee, M.D.Bellaire, TX 774011043298482
- Mehrzad Zarghouni, M.D.Bellaire, TX 774011780900993
Common questions
What is Ryan N. Armstrong, MD's NPI number?
Ryan N. Armstrong, MD's National Provider Identifier (NPI) is 1154453355, issued on Mar 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ryan N. Armstrong, MD located?
The NPPES record lists a practice address at 8850 Six Pines Dr Ste 280, Shenandoah, TX, 77380. Phone: (713) 597-8535. Providers update this record themselves, so call before visiting.
How can I verify Ryan N. Armstrong, MD's license?
NPPES lists Texas license number M3868, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ryan N. Armstrong, MD prescribe under Medicare Part D?
In 2024, Ryan N. Armstrong, MD had 33 Medicare Part D claims for 13 beneficiaries; the average among vascular & interventional radiology physician prescribers was 75. Part D covers Medicare prescriptions only.
What is Ryan N. Armstrong, MD's MIPS final score?
The 2023 MIPS final score is 83.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.