Marshall Byun-Andersen, MD
NPI 1265994032 · Emergency Medicine Physician · Shreveport, LA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marshall Byun-Andersen, MD is a Emergency Medicine Physician provider in Shreveport, LA (NPI 1265994032).
Provider details
- NPI number
- 1265994032
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 330641 (LA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
277 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 | 128 | $167 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 99 | $8 |
| Critical Care, First 30-74 Minutes99291 | 29 | $201 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 21 | $115 |
Typical Medicare-allowed amounts for these services range $8–$201 (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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 40 | 19 |
| Amlodipine Besylate | 26 | 11 |
| Lisinopril | 25 | 13 |
| Losartan Potassium | 14 | — |
| Gabapentin | 14 | — |
| Nifedipinebrand: Nifedipine Er | 13 | — |
| Pantoprazole Sodium |
Practice location
Mailing address
Additional practice locations (1)
- 815 S Pine StVivian, LA 71082-3314Phone: (318) 375-3235
Registry dates
- Enumerated
- 2019-04-02
- Last updated
- 2023-01-10
- Certified
- 2022-12-08
Frequently asked questions
- What is Marshall Byun-Andersen's NPI number?
- Marshall Byun-Andersen's National Provider Identifier (NPI) is 1265994032, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marshall Byun-Andersen's specialty?
- Marshall Byun-Andersen is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marshall Byun-Andersen located?
- Marshall Byun-Andersen's practice location on file with NPPES is 1541 Kings Highway, Shreveport, LA 71130-3932.
- What is Marshall Byun-Andersen's phone number?
- The practice phone number listed in the NPPES registry for Marshall Byun-Andersen is (318) 626-0014.
- Does Marshall Byun-Andersen accept Medicare?
- Marshall Byun-Andersen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marshall Byun-Andersen's NPI active?
- Yes — Marshall Byun-Andersen's NPI (1265994032) is active in the NPPES registry as of the last update on 2023-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.