NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1588192181 MD, PHD
Verify on CMS → Amir Ghaffari, MD, PHD
Gastroenterology 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 16,601 in Gastroenterology 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
103
Medicare Part D claims · 17 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
77.5/100
▼ 6 pts below national avg 83.1 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Amir Ghaffari, MD, PHD reported a CMS MIPS final score of 77.5/100 - below the 83.1 national average - and filed 103 Medicare Part D claims in 2023.
- 77.5/100
- MIPS score · -6 vs avg
- 103
- Part D claims, 2023
- 83%
- generic prescribing
- 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.
Amir Ghaffari, MD, PHD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
78 24th percentile higher than 24% 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 Amir Ghaffari, MD, PHD sits
This provider among gastroenterology physician peers
Across the 5,957 gastroenterology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Amir Ghaffari, MD, PHD writes more Part D claims than 8% of them and scores higher on MIPS quality than 25% - placing this provider in the lower-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 gastroenterology physician peer from a representative sample of 60; the gold marker is Amir Ghaffari, MD, PHD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Amir Ghaffari, MD, PHD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Amir Ghaffari, MD, PHD?
Below national averagePrimary specialty
Gastroenterology Physician
Medicare Part D claims
103 88% vs specialty avg
MIPS final score
77.5/100 5.6 pts vs avg
Specialty distribution in California
How Gastroenterology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Amir Ghaffari, MD, PHD's 2023 MIPS final score plotted against the Gastroenterology Physician national average
- MIPS Final Score
- 77.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Gastroenterology Physician) - 77.5/100 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).
Amir Ghaffari, MD, PHD appears in the CMS NPPES registry as a Gastroenterology Physician provider holding MD, PHD credentials at 100 UCLA MEDICAL PLAZA STE 205, Los Angeles, CA, 90095, with a listed phone of (310) 208-5400. NPI 1588192181 was issued on 05/25/2017.
Medicare Part D records for calendar year 2023 show 103 prescription claims written by this provider, covering 17 Medicare beneficiaries and totaling roughly $47K in drug spend, split 17% brand-name and 83% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 77.5/100 for the 2023 performance year (Quality 68.6, Cost 56.4), compared with the national average of 83.1.
Gastroenterology Physician is a mid-sized specialty nationwide, with 16,601 enrolled providers across 54 states and an average of 833 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 | 1588192181 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | MD, PHD |
| Gender | Male |
| NPI Issued | 05/25/2017 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
77.5068
Final Score
Avg: 83.1
68.6144
Quality
56.4081
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Amir Ghaffari, MD, PHD 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.
The Regents OF The University OF California
Los Angeles, 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 Amir Ghaffari, MD, PHD. To verify Amir Ghaffari, MD, PHD'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.
Brand vs generic prescribing mix · Typical
Amir Ghaffari, MD, PHD - brand share 17.0%
Gastroenterology Physician average
17% brand-name claims vs 83% generic, on 103 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
103
Total Claims
$47K
Total Drug Cost
17
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 177
- Total Day Supply
- 4,883
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $41K
- Generic Drug Cost
- $7K
Patient Demographics
- Average Patient Age
- 65.8 years
- Avg HCC Risk Score
- 1.88
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Omeprazole | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Amir Ghaffari, MD, PHD fits within the Gastroenterology Physician landscape nationally.
16,601
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
Amir Ghaffari, MD, PHD's 103 claims are below the specialty average of 833.
Nearby Gastroenterology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Ghaffari.
Dr. David Aarons
MD
Lodi, CA
Dr. Constante Abaya
MD
Oxnard, CA
Dr. Homan Abdollahzadeh
MD
Palm Springs, CA
Dr. John Abdulian
M.D.
Fresno, CA
Dr. Hussein Abidali
DO
Rancho Cucamonga, CA
Compare Gastroenterology 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 Gastroenterology 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 Amir Ghaffari, MD, PHD's specialty? ▼
Amir Ghaffari, MD, PHD specializes in Gastroenterology Physician and practices in Los Angeles, California. Credentials: MD, PHD.
How much does Amir Ghaffari, MD, PHD prescribe under Medicare Part D? ▼
In 2023, Amir Ghaffari, MD, PHD wrote 103 Medicare Part D claims totaling $47K in drug costs for 17 beneficiaries.
What is Amir Ghaffari, MD, PHD's Medicare quality score? ▼
Amir Ghaffari, MD, PHD has a CMS MIPS Final Score of 77.5/100 (Quality: 68.6, Cost: 56.4). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Amir Ghaffari, MD, PHD located? ▼
Amir Ghaffari, MD, PHD is located at 100 UCLA MEDICAL PLAZA STE 205, Los Angeles, CA, 90095. Phone: (310) 208-5400.
What is Amir Ghaffari, MD, PHD's NPI number? ▼
Amir Ghaffari, MD, PHD's National Provider Identifier (NPI) is 1588192181, issued on 05/25/2017.
Does Amir Ghaffari, MD, PHD prescribe more brand-name or generic drugs? ▼
Amir Ghaffari, MD, PHD's prescribing is 17% brand-name and 83% generic drugs by claim count, with $41K in brand drug costs.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,601 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Amir Ghaffari, MD, PHD prescribe most often? ▼
Based on 2023 Medicare Part D data, Amir Ghaffari, MD, PHD's most frequently prescribed drugs include Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Amir Ghaffari, MD, PHD accept Medicare? ▼
Amir Ghaffari, MD, PHD appears in CMS Medicare data with 103 Part D claims and 17 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Amir Ghaffari, MD, PHD's credentials? ▼
Amir Ghaffari, MD, PHD's NPI is 1588192181 with credentials MD, PHD. 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.