Oliver Williams, M.D.
NPI 1013975820 · Emergency Medicine Physician · Brownwood, TX
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Oliver Williams, M.D. is a Emergency Medicine Physician provider in Brownwood, TX (NPI 1013975820).
Provider details
- NPI number
- 1013975820
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- D8112 (TX)
Specialties & taxonomies
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
155 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 95 | $178 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 60 | $122 |
Typical Medicare-allowed amounts for these services range $122–$178 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Celecoxib | 51 | 51 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 35 | 35 |
| Cefdinir | 33 | 33 |
| Ondansetronbrand: Ondansetron Odt | 28 | 26 |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 27 | 24 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 19 | 19 |
| Dicyclomine Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-02
- Last updated
- 2013-10-30
Frequently asked questions
- What is Oliver Williams's NPI number?
- Oliver Williams's National Provider Identifier (NPI) is 1013975820, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Oliver Williams's specialty?
- Oliver Williams is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Oliver Williams located?
- Oliver Williams's practice location on file with NPPES is 1501 Burnet Rd, Brownwood, TX 76801-8520.
- What is Oliver Williams's phone number?
- The practice phone number listed in the NPPES registry for Oliver Williams is (830) 990-4133.
- Does Oliver Williams accept Medicare?
- Oliver Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Oliver Williams's NPI active?
- Yes — Oliver Williams's NPI (1013975820) is active in the NPPES registry as of the last update on 2013-10-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.