Warren Simi, MD
NPI 1255329561 · Internal Medicine Physician · Houston, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Warren Simi, MD is a Internal Medicine Physician provider in Houston, TX (NPI 1255329561).
Provider details
- NPI number
- 1255329561
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- D 9661 (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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
100 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 51 | $128 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 27 | $89 |
| Urinalysis, Manual Test81002 | 22 | $3 |
Typical Medicare-allowed amounts for these services range $3–$128 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 288 | 87 |
| Amlodipine Besylate | 140 | 44 |
| Losartan Potassium | 105 | 36 |
| Metoprolol Succinate | 101 | 33 |
| Lisinopril | 96 | 27 |
| Gabapentin | 85 | 21 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-11
- Last updated
- 2007-12-11
Frequently asked questions
- What is Warren Simi's NPI number?
- Warren Simi's National Provider Identifier (NPI) is 1255329561, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Warren Simi's specialty?
- Warren Simi is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Warren Simi located?
- Warren Simi's practice location on file with NPPES is 4126 Southwest Fwy, Houston, TX 77027-7310.
- What is Warren Simi's phone number?
- The practice phone number listed in the NPPES registry for Warren Simi is (713) 479-1100.
- Does Warren Simi accept Medicare?
- Warren Simi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Warren Simi's NPI active?
- Yes — Warren Simi's NPI (1255329561) is active in the NPPES registry as of the last update on 2007-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.