NPI registry status
Active
2026 NPPES data Psychiatry Physician NPI 1528420817 M.D.
Verify on CMS → Aaron Greene, M.D.
Psychiatry Physician in Los Angeles, 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 54,383 in Psychiatry 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
17
Medicare Part D claims · Psychiatry Physician avg: 1K
MIPS score
91.7/100
▲ 8 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Aaron Greene, M.D. reported a CMS MIPS final score of 91.7/100 - above the 83.5 national average - and filed 17 Medicare Part D claims in 2024.
- 91.7/100
- MIPS score · +8 vs avg
- 17
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥61st
- pct among measured MIPS (lower-bound band)
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.
Federal trust snapshot
What official records show about Aaron Greene, M.D.
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1528420817), first enumerated 03/24/2016.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 17 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 91.7/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Aaron Greene, M.D.'s individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1528420817 · Psychiatry Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ABOVE · RX-TRACE · BOOK-MID · PHOTO-FINISH
- NPI-10 1528420817
- ENUM-MID 2016
- TAX-MEGA 54K Psychiatry Physician
- MIPS-ABOVE 91.7/100
- RX-TRACE 17
- BOOK-MID 7,890 in California
- PHOTO-FINISH Randall Espinoza, MD… · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Greene · this pr…
Greene · this provider
91.7 MIPS pts
- Randall Espinoza…
Randall Espinoza, MD, MPH
91.7 MIPS pts
- Michael Zito, MD…
Michael Zito, MD
91.7 MIPS pts
- Cesar Figueroa, …
Cesar Figueroa, MD
91.7 MIPS pts
- Kathleen Hecksel…
Kathleen Hecksel, M.D.
91.8 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Aaron Greene, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
92 ≥ 61st percentile 61% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Aaron Greene, M.D. sits
This provider among psychiatry physician peers
Across the 4,541 psychiatry physician providers who report both Medicare Part D prescribing and a MIPS quality score, Aaron Greene, M.D. writes more Part D claims than 4% of them and scores higher on MIPS quality than 65% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one psychiatry physician peer from a representative sample of 60; the gold marker is Aaron Greene, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Aaron Greene, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Aaron Greene, M.D.?
High performer (top quartile)Primary specialty
Psychiatry Physician
Medicare Part D claims
17 98% vs specialty avg
MIPS final score
91.7/100 8.2 pts vs avg
Specialty distribution in California
How Psychiatry Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Aaron Greene, M.D.'s 2023 MIPS final score plotted against the Psychiatry Physician national average
- MIPS Final Score
- 91.7/100
- vs 83.5 national avg · 2023 performance year
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).
Practice Address
Provider Details
| NPI | 1528420817 |
|---|---|
| Specialty | Psychiatry Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/24/2016 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
91.7046
Final Score
Measured-score avg: 83.5
70.7752
Quality
100
Promoting Interoperability
Reporting: Group practice
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 Aaron Greene, M.D.. To verify Aaron Greene, 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 2024.
17
Total Claims
$299
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 39
- Total Day Supply
- 1,170
- Brand Drug Cost
- $0
- Generic Drug Cost
- $299
Patient Demographics
- Average Patient Age
- 75.2 years
- Avg HCC Risk Score
- 1.37
Psychiatry Physician Overview
How Aaron Greene, M.D. fits within the Psychiatry Physician landscape nationally.
54,383
Psychiatry Physician Providers in US
56
States with Psychiatry Physician
1,010
Avg Claims per Provider
Aaron Greene, M.D.'s 17 claims are below the specialty average of 1,010.
Nationwide Psychiatry Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Greene, both outside California so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (91.7 here).
Same NPPES enumeration year (2016)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Psychiatry Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Greene.
One of 7,890 Psychiatry Physician providers enrolled in California, 5 are shown here.
Dr. Nancy Aaen
MD
Napa, CA
Dr. Criselda Abad-Santos
M.D.
Woodland Hills, CA
Dr. Mekabiz Abaian
MD
San Bernardino, CA
Dr. Kafia Abbasi
M.D.
French Camp, CA
Dr. Michele Abbasi
M.D.
Westlake Village, CA
Compare Psychiatry Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Aaron Greene, M.D.'s specialty? ▼
Aaron Greene, M.D. specializes in Psychiatry Physician and practices in Los Angeles, California. Credentials: M.D..
How much does Aaron Greene, M.D. prescribe under Medicare Part D? ▼
In 2024, Aaron Greene, M.D. wrote 17 Medicare Part D claims totaling $299 in drug costs for N/A beneficiaries.
What is Aaron Greene, M.D.'s Medicare quality score? ▼
Aaron Greene, M.D. has a CMS MIPS Final Score of 91.7/100 (Quality: 70.8). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Aaron Greene, M.D. located? ▼
Aaron Greene, M.D. is located at 300 UCLA MEDICAL PLZ STE 2200, Los Angeles, CA, 90095. Phone: (310) 825-9989.
What is Aaron Greene, M.D.'s NPI number? ▼
Aaron Greene, M.D.'s National Provider Identifier (NPI) is 1528420817, issued on 03/24/2016.
How many Psychiatry Physician providers are there in the US? ▼
There are 54,383 Psychiatry Physician providers across 56 states in the US. The average Psychiatry Physician provider writes 1,010 Medicare Part D claims per year.
Does Aaron Greene, M.D. accept Medicare? ▼
Aaron Greene, M.D. appears in CMS Medicare data with 17 Part D claims and N/A Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Aaron Greene, M.D.'s credentials? ▼
Aaron Greene, M.D.'s NPI is 1528420817 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.