Ariana N. Dillman, M.D.
Emergency Medicine Physician · Oceanside, CA
Ariana N. Dillman, M.D. is an emergency medicine physician with a practice address in Oceanside, California, and NPI 1497067862, issued on Jul 13, 2010. Check the license (California A118150, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ariana N. Dillman
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A118150 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4002 Vista Way, Oceanside, CA 92056
- Phone
- (760) 439-1963
- Enumerated
- Jul 13, 2010
- Record last updated
- May 26, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20121206000056); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 4002 Vista Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Alaynick, M.D.Emergency Medicine Physician1073507174
- Matthew Allen, PA-CMedical Physician Assistant1770963589
- David Antoun, MDInternal Medicine Physician1043573785
- Hermineh AraminCytopathology Physician1821451444
- Allison Auchter, MD, PHDEmergency Medical Services (Emergency Medicine) Physician1013595248
- Romana Bailey, M.D.Neonatal-Perinatal Medicine Physician1396023685
Verify Ariana N. Dillman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A118150Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average emergency medicine physician in 2024
486 Medicare Part D claims for 241 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 36 claims were for opioids.
Most prescribed
- Doxycycline Hyclate39 claims
- Ibuprofen35 claims
- Cefuroxime34 claims
- Prednisone32 claims
- Methylprednisolone27 claims
- Hydrocodone-Acetaminophen25 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 88 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Centro DE Salud DE LA Comunidad DE San Ysidro, Inc.Chula Vista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ariana N. Dillman among 7,751 emergency medicine physician records in California
Ariana N. Dillman, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 58% of them.
- NPI issued2010 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2010 · median 2011 among the 4,560 with a school on file
- Record last updated2015 · 59% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 emergency medicine physician records list a practice address in Oceanside
They are 50 of the 3,438 NPPES records with a practice address in Oceanside, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Oceanside → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Michael Alaynick, M.D.Oceanside, CA 920561073507174
- Dorothy Brown, M.D.Oceanside, CA 920561710971643
- Randall Browning, M.D.Oceanside, CA 920561629062559
- John Bushong, M.D.Oceanside, CA 920561235123050
- Reid Conant, M.D.Oceanside, CA 920561255326351
- Michael Forman, M.D.Oceanside, CA 920561992790661
- Steven Gabriel, M.D.Oceanside, CA 920561780679464
- Darin Garner, M.D.Oceanside, CA 920561275535874
Common questions
What is Ariana N. Dillman, M.D.'s NPI number?
Ariana N. Dillman, M.D.'s National Provider Identifier (NPI) is 1497067862, issued on Jul 13, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Ariana N. Dillman, M.D. located?
The NPPES record lists a practice address at 4002 Vista Way, Oceanside, CA, 92056. Phone: (760) 439-1963. Providers update this record themselves, so call before visiting.
How can I verify Ariana N. Dillman, M.D.'s license?
NPPES lists California license number A118150, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ariana N. Dillman, M.D. prescribe under Medicare Part D?
In 2024, Ariana N. Dillman, M.D. had 486 Medicare Part D claims for 241 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Ariana N. Dillman, M.D.'s MIPS final score?
The 2023 MIPS final score is 88 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.