NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1497067862 M.D.
Verify on CMS → Ariana Dillman, M.D.
Emergency Medicine Physician in Oceanside, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 64,463 in Emergency Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
471
Medicare Part D claims · 253 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
88/100
▲ 5 pts above national avg 83.1 · Above neutral
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Ariana Dillman, M.D. reported a CMS MIPS final score of 88/100 - above the 83.1 national average - and filed 471 Medicare Part D claims in 2023.
- 88/100
- MIPS score · +5 vs avg
- 471
- Part D claims, 2023
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Ariana Dillman, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
88 Top 46% higher than 54% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Ariana Dillman, M.D. sits
This provider among emergency medicine physician peers
Across the 14,967 emergency medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Ariana Dillman, M.D. writes more Part D claims than 91% of them and scores higher on MIPS quality than 44% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one emergency medicine physician peer from a representative sample of 60; the gold marker is Ariana Dillman, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Ariana Dillman, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Ariana Dillman, M.D.?
High performer (top quartile)Primary specialty
Emergency Medicine Physician
Medicare Part D claims
471 34% vs specialty avg
MIPS final score
88/100 4.9 pts vs avg
Specialty distribution in California
How Emergency Medicine Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Ariana Dillman, M.D.'s 2023 MIPS final score plotted against the Emergency Medicine Physician national average
- MIPS Final Score
- 88/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Emergency Medicine Physician) - 88/100 vs national avg 83.1
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Ariana Dillman, M.D. appears in the CMS NPPES registry as an Emergency Medicine Physician provider holding M.D. credentials at 4002 VISTA WAY, Oceanside, CA, 92056, with a listed phone of (760) 439-1963. NPI 1497067862 was issued on 07/13/2010.
Medicare Part D records for calendar year 2023 show 471 prescription claims written by this provider, covering 253 Medicare beneficiaries and totaling roughly $12K in drug spend, with an opioid prescribing rate of 6.4%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 88/100 for the 2023 performance year (Quality 74.1), compared with the national average of 83.1.
Emergency Medicine Physician is a high-volume specialty nationwide, with 64,463 enrolled providers across 56 states and an average of 352 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1497067862 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 07/13/2010 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
87.9594
Final Score
Avg: 83.1
74.0699
Quality
Reporting: Group practice
Hospital and facility affiliations
Facilities where Ariana Dillman, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Centro DE Salud DE LA Comunidad DE San Ysidro, Inc
Chula Vista, CA
Chula Vista Emergency Room Physicians A Medical Corporation
Chula Vista, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Ariana Dillman, M.D.. To verify Ariana Dillman, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
471
Total Claims
$12K
Total Drug Cost
253
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 482
- Total Day Supply
- 6,086
- Generic Drug Cost
- $6K
- Opioid Claims
- 30 (6.4% rate)
- Antibiotic Claims
- 143
Patient Demographics
- Average Patient Age
- 70.3 years
- Avg HCC Risk Score
- 1.64
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 51, 65-74: 120, 75-84: 59, 85+: 23
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ariana Dillman, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Doxycycline Hyclate
Doxycycline Hyclate
43 claims
- Ibuprofen
Ibuprofen
40 claims
- Prednisone
Prednisone
33 claims
- Cephalexin
Cephalexin
30 claims
- Methylprednisolone
Methylprednisolone
25 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
20 claims
- Diclofenac Sodium
Diclofenac Sodium
19 claims
- Azithromycin 17
Azithromycin
17 claims
| Drug | Claims |
|---|---|
| Doxycycline Hyclate | 43 |
| Ibuprofen | 40 |
| Prednisone | 33 |
| Cephalexin | 30 |
| Methylprednisolone | 25 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 20 |
| Diclofenac Sodium | 19 |
| Azithromycin | 17 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 16 |
| Ondansetron Odt Ondansetron | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How Ariana Dillman, M.D. fits within the Emergency Medicine Physician landscape nationally.
64,463
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
Ariana Dillman, M.D.'s 471 claims are above the specialty average of 352.
Nearby Emergency Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Dillman.
Dr. Cooper Aakhus
MD
Stanford, CA
Dr. Pyra Aarden
MD
Martinez, CA
Dr. Neal Aaron
D.O.
Encinitas, CA
Eric Aaserude
Walnut Creek, CA
Dr. Nader Abas
MD
Barstow, CA
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Emergency Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Ariana Dillman, M.D.'s specialty? ▼
Ariana Dillman, M.D. specializes in Emergency Medicine Physician and practices in Oceanside, California. Credentials: M.D..
How much does Ariana Dillman, M.D. prescribe under Medicare Part D? ▼
In 2023, Ariana Dillman, M.D. wrote 471 Medicare Part D claims totaling $12K in drug costs for 253 beneficiaries.
What is Ariana Dillman, M.D.'s Medicare quality score? ▼
Ariana Dillman, M.D. has a CMS MIPS Final Score of 88/100 (Quality: 74.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ariana Dillman, M.D. located? ▼
Ariana Dillman, M.D. is located at 4002 VISTA WAY, Oceanside, CA, 92056. Phone: (760) 439-1963.
What is Ariana Dillman, M.D.'s NPI number? ▼
Ariana Dillman, M.D.'s National Provider Identifier (NPI) is 1497067862, issued on 07/13/2010.
Does Ariana Dillman, M.D. prescribe opioids? ▼
Yes, Ariana Dillman, M.D. had 30 opioid claims in 2023 with an opioid prescribing rate of 6.4%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,463 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does Ariana Dillman, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ariana Dillman, M.D.'s most frequently prescribed drugs include Doxycycline Hyclate, Ibuprofen, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ariana Dillman, M.D. accept Medicare? ▼
Ariana Dillman, M.D. appears in CMS Medicare data with 471 Part D claims and 253 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ariana Dillman, M.D.'s credentials? ▼
Ariana Dillman, M.D.'s NPI is 1497067862 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.