Caroline Anne Arnold, MD
Emergency Medicine Physician · Walla Walla, WA
Caroline Anne Arnold, MD is an emergency medicine physician with a practice address in Walla Walla, Washington, and NPI 1811492739, issued on Mar 25, 2018. Check the license (Washington MD61145396, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Caroline Anne Arnold
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD61145396 WA
54507 KY
Self-reported in NPPES; status is on the state search - Practice location
- 401 W Poplar St, Walla Walla, WA 99362
- Phone
- (509) 897-3320
- Enumerated
- Mar 25, 2018
- Record last updated
- Aug 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210712001061); accepts Medicare assignment
- Medical or professional school
- University Of Arkansas College Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,459 in Washington → Look up another NPI →
Also registered at 401 W Poplar St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Christopher Aldrich, M.D.Anesthesiology Physician1891084562
- Tami Arias, RNDiabetes Educator Registered Nurse1760959514
- Alexandra Baker, DNPNurse Practitioner1306473202
- Bret Barnes, PHARMD., RPH.Pharmacist1609128875
Verify Caroline Anne Arnold in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61145396Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average emergency medicine physician in 2024
346 Medicare Part D claims for 215 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 46 claims were for opioids.
Most prescribed
- Oxycodone Hcl39 claims
- Cefdinir29 claims
- Azithromycin27 claims
- Ondansetron Odt26 claims
- Amoxicillin-Clavulanate Potass25 claims
- Cephalexin21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Providence Health And Services - WashingtonWalla Walla, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Caroline Anne Arnold among 1,459 emergency medicine physician records in Washington
Caroline Anne Arnold, MD is one of 1,459 emergency medicine physician records with a practice address in Washington. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 85% of them.
- NPI issued2018 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2018 · median 2010 among the 851 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 emergency medicine physician records list a practice address in Walla Walla
They are 21 of the 1,276 NPPES records with a practice address in Walla Walla, and 1,459 emergency medicine physician records in Washington.
All 1,459 in Washington → Every provider in Walla Walla → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Joilo Barbosa, M.D.Walla Walla, WA 993621235243155
- Robert Billingsley, MDWalla Walla, WA 993621487668893
- Philip Green, MDWalla Walla, WA 993621104867373
- Christopher Jenkins, DOWalla Walla, WA 993621962495994
- Robert Johnson, MD00041003Walla Walla, WA 993621730262726
- Aaron Jones, MDWalla Walla, WA 993621265446678
- David Maxwell, MDWalla Walla, WA 993621427261882
- Michael McMurtry, D.O.Walla Walla, WA 993621750367579
Common questions
What is Caroline Anne Arnold, MD's NPI number?
Caroline Anne Arnold, MD's National Provider Identifier (NPI) is 1811492739, issued on Mar 25, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Caroline Anne Arnold, MD located?
The NPPES record lists a practice address at 401 W Poplar St, Walla Walla, WA, 99362. Phone: (509) 897-3320. Providers update this record themselves, so call before visiting.
How can I verify Caroline Anne Arnold, MD's license?
NPPES lists Washington license number MD61145396, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Caroline Anne Arnold, MD prescribe under Medicare Part D?
In 2024, Caroline Anne Arnold, MD had 346 Medicare Part D claims for 215 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.