Louis Peng, MD
NPI 1831121615 · Internal Medicine Physician · Battle Ground, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Peng, MD is a Internal Medicine Physician provider in Battle Ground, WA (NPI 1831121615).
Provider details
- NPI number
- 1831121615
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD20257 (OR)
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
19 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
43 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 | 23 | $128 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 20 | $9 |
Typical Medicare-allowed amounts for these services range $9–$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 · 68 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 196 | 67 |
| Rosuvastatin Calcium | 196 | 73 |
| Losartan Potassium | 152 | 61 |
| Metoprolol Succinate | 101 | 35 |
| Levothyroxine Sodium | 100 | 41 |
| Gabapentin | 99 | 23 |
| Amlodipine Besylate |
Practice location
Mailing address
Additional practice locations (1)
- 650 N Devine Rd Ste BVancouver, WA 98661-6979Phone: (360) 952-4457Fax: (360) 828-7409
Registry dates
- Enumerated
- 2006-07-06
- Last updated
- 2022-02-08
- Certified
- 2022-02-08
Frequently asked questions
- What is Louis Peng's NPI number?
- Louis Peng's National Provider Identifier (NPI) is 1831121615, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Peng's specialty?
- Louis Peng is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Peng located?
- Louis Peng's practice location on file with NPPES is 18 Nw 20th Ave, Battle Ground, WA 98604-4175.
- What is Louis Peng's phone number?
- The practice phone number listed in the NPPES registry for Louis Peng is (360) 952-4457.
- Does Louis Peng accept Medicare?
- Louis Peng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Peng's NPI active?
- Yes — Louis Peng's NPI (1831121615) is active in the NPPES registry as of the last update on 2022-02-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.