Sumiko Armstead, MD
NPI 1528267812 · Nephrology Physician · Cypress, TX
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sumiko Armstead, MD is a Nephrology Physician provider in Cypress, TX (NPI 1528267812).
Provider details
- NPI number
- 1528267812
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- N4916 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
577 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 265 | $122 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 156 | $122 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 61 | $274 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 29 | $119 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 23 | $160 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 56 | 18 |
| Amlodipine Besylate | 46 | 15 |
| Nifedipinebrand: Nifedipine Er | 44 | 12 |
| Carvedilol | 35 | 15 |
| Sevelamer Carbonate | 35 | 15 |
| Sucroferric Oxyhydroxidebrand: Velphoro | 28 | — |
| Dapagliflozin Propanediolbrand: Farxiga | 27 | — |
Practice location
Mailing address
Additional practice locations (2)
- 7600 Beechnut St Fl 8Houston, TX 77074-4302Phone: (713) 456-5686
- 909 Dairy Ashford Rd Ste 207Houston, TX 77079-5306Phone: (281) 908-8047Fax: (281) 456-3981
Registry dates
- Enumerated
- 2007-07-16
- Last updated
- 2026-03-19
- Certified
- 2026-03-19
Frequently asked questions
- What is Sumiko Armstead's NPI number?
- Sumiko Armstead's National Provider Identifier (NPI) is 1528267812, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sumiko Armstead's specialty?
- Sumiko Armstead is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Sumiko Armstead located?
- Sumiko Armstead's practice location on file with NPPES is 27700 Northwest Fwy Ste 330, Cypress, TX 77433-6767.
- What is Sumiko Armstead's phone number?
- The practice phone number listed in the NPPES registry for Sumiko Armstead is (281) 908-8047.
- Does Sumiko Armstead accept Medicare?
- Sumiko Armstead is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sumiko Armstead's NPI active?
- Yes — Sumiko Armstead's NPI (1528267812) is active in the NPPES registry as of the last update on 2026-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.