Caroline Arnold, MD
NPI 1811492739 · Emergency Medicine Physician · Walla Walla, WA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caroline Arnold, MD is a Emergency Medicine Physician provider in Walla Walla, WA (NPI 1811492739).
Provider details
- NPI number
- 1811492739
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 54507 (KY)
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
8 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
530 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 | 253 | $169 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 216 | $116 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 61 | $69 |
Typical Medicare-allowed amounts for these services range $69–$169 (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 |
|---|---|---|
| Oxycodone Hcl | 39 | 39 |
| Cefdinir | 29 | 28 |
| Azithromycin | 27 | 27 |
| Ondansetronbrand: Ondansetron Odt | 26 | 26 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 25 | 25 |
| Cephalexin | 21 | 21 |
| Methylprednisolone | 21 | 20 |
Practice location
Mailing address
Additional practice locations (1)
- 222 Medical CircleMorehead, KY 40351-1179Phone: (606) 783-6500
Registry dates
- Enumerated
- 2018-03-25
- Last updated
- 2021-08-19
- Certified
- 2021-08-19
Frequently asked questions
- What is Caroline Arnold's NPI number?
- Caroline Arnold's National Provider Identifier (NPI) is 1811492739, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caroline Arnold's specialty?
- Caroline Arnold is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Caroline Arnold located?
- Caroline Arnold's practice location on file with NPPES is 401 W Poplar St, Walla Walla, WA 99362-2846.
- What is Caroline Arnold's phone number?
- The practice phone number listed in the NPPES registry for Caroline Arnold is (509) 897-3320.
- Does Caroline Arnold accept Medicare?
- Caroline Arnold is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caroline Arnold's NPI active?
- Yes — Caroline Arnold's NPI (1811492739) is active in the NPPES registry as of the last update on 2021-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.