Robert Preston, MD
NPI 1538336581 · Trauma Surgery Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Preston, MD is a Trauma Surgery Physician provider in Los Angeles, CA (NPI 1538336581).
Provider details
- NPI number
- 1538336581
- Entity type
- Individual
- Primary specialty
- Trauma Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 128134 (NC)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
355 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 | 179 | $176 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 80 | $122 |
| Critical Care, First 30-74 Minutes99291 | 68 | $217 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 15 | $72 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 13 | $179 |
Typical Medicare-allowed amounts for these services range $72–$217 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 43 | 40 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 35 | 33 |
| Ibuprofen | 34 | 33 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 17 | 17 |
| Meloxicam | 17 | 17 |
| Cephalexin | 15 | 15 |
| Cyclobenzaprine Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-05-09
- Last updated
- 2015-03-12
Frequently asked questions
- What is Robert Preston's NPI number?
- Robert Preston's National Provider Identifier (NPI) is 1538336581, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Preston's specialty?
- Robert Preston is listed in the NPPES registry with a primary specialty of Trauma Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Preston located?
- Robert Preston's practice location on file with NPPES is 2051 Marengo St, Los Angeles, CA 90033-1352.
- What is Robert Preston's phone number?
- The practice phone number listed in the NPPES registry for Robert Preston is (323) 865-1241.
- Does Robert Preston accept Medicare?
- Robert Preston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Preston's NPI active?
- Yes — Robert Preston's NPI (1538336581) is active in the NPPES registry as of the last update on 2015-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.