William O'Malley, MD
NPI 1275528002 · Emergency Medicine Physician · Houston, TX
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William O'Malley, MD is a Emergency Medicine Physician provider in Houston, TX (NPI 1275528002).
Provider details
- NPI number
- 1275528002
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- J8075 (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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
90 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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 50 | $128 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 26 | $186 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 14 | $129 |
Typical Medicare-allowed amounts for these services range $128–$186 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 73 | 63 |
| Methylprednisolone | 43 | 43 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 30 | 29 |
| Cephalexin | 25 | 24 |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 22 | 22 |
| Azithromycin | 17 | 17 |
| Nirmatrelvir/Ritonavirbrand: Paxlovid |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$184 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
Registry dates
- Enumerated
- 2005-09-19
- Last updated
- 2011-10-20
Frequently asked questions
- What is William O'Malley's NPI number?
- William O'Malley's National Provider Identifier (NPI) is 1275528002, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William O'Malley's specialty?
- William O'Malley is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William O'Malley located?
- William O'Malley's practice location on file with NPPES is 10655 Steepletop Dr, Houston, TX 77065-4222.
- What is William O'Malley's phone number?
- The practice phone number listed in the NPPES registry for William O'Malley is (281) 897-3150.
- Does William O'Malley accept Medicare?
- William O'Malley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William O'Malley's NPI active?
- Yes — William O'Malley's NPI (1275528002) is active in the NPPES registry as of the last update on 2011-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.