NPI registry status
Active
2026 NPPES data Specialist NPI 1548353956 M.D.
Verify on CMS → Gregory Ardigo, M.D.
Specialist in Murrieta, 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 69,608 in Specialist, 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
1K
Medicare Part D claims · 569 beneficiaries · Specialist avg: 1K
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
89.2/100
▲ 6 pts above national avg 83.1 · Exceptional
Industry payments
$1.3K
66 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Gregory Ardigo, M.D. reported a CMS MIPS final score of 89.2/100 - above the 83.1 national average - and filed 1,282 Medicare Part D claims in 2023.
- 89.2/100
- MIPS score · +6 vs avg
- 1K
- Part D claims, 2023
- 80%
- generic prescribing
- $1.3K
- industry payments (Sunshine Act)
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.
Gregory Ardigo, 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
89 Top 42% higher than 58% 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 Gregory Ardigo, M.D. sits
This provider among specialist peers
Across the 4,869 specialist providers who report both Medicare Part D prescribing and a MIPS quality score, Gregory Ardigo, M.D. writes more Part D claims than 60% of them and scores higher on MIPS quality than 66% - placing this provider in the high-volume, high-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 specialist peer from a representative sample of 60; the gold marker is Gregory Ardigo, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Gregory Ardigo, M.D.?
High performer (top quartile)Primary specialty
Specialist
Medicare Part D claims
1,282 13% vs specialty avg
MIPS final score
89.2/100 6.1 pts vs avg
Specialty distribution in California
How Specialist compares to other specialties among California providers
Medicare quality performance, MIPS
Gregory Ardigo, M.D.'s 2023 MIPS final score plotted against the Specialist national average
- MIPS Final Score
- 89.2/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Specialist) - 89.2/100 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).
Gregory Ardigo, M.D. appears in the CMS NPPES registry as a Specialist provider holding M.D. credentials at 40404 CALIFORNIA OAKS RD, Murrieta, CA, 92562, with a listed phone of (951) 600-0288. NPI 1548353956 was issued on 09/30/2006.
Medicare Part D records for calendar year 2023 show 1,282 prescription claims written by this provider, covering 569 Medicare beneficiaries and totaling roughly $635K in drug spend, split 20% brand-name and 80% generic by claim count, with an opioid prescribing rate of 1.4%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 89.2/100 for the 2023 performance year (Quality 78.3), compared with the national average of 83.1.
Specialist is a high-volume specialty nationwide, with 69,608 enrolled providers across 55 states and an average of 1,474 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 | 1548353956 |
|---|---|
| Specialty | Specialist |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 09/30/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
89.1603
Final Score
Avg: 83.1
78.3205
Quality
Reporting: Group practice
Hospital and facility affiliations
Facilities where Gregory Ardigo, 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.
Inland Empire Gastroenterology Medical Group, Inc.
Murrieta, 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).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Gregory Ardigo, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.3K
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
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 Gregory Ardigo, M.D.. To verify Gregory Ardigo, 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.
Brand vs generic prescribing mix · Typical
Gregory Ardigo, M.D. - brand share 20.0%
Specialist average
20% brand-name claims vs 80% generic, on 1,282 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.
1,282
Total Claims
$635K
Total Drug Cost
569
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,998
- Total Day Supply
- 47,473
- Brand vs Generic
- 20% brand / 80% generic
- Brand Drug Cost
- $562K
- Generic Drug Cost
- $74K
- Opioid Claims
- 18 (1.4% rate)
- Antibiotic Claims
- 42
Patient Demographics
- Average Patient Age
- 73.0 years
- Avg HCC Risk Score
- 1.40
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 37, 65-74: 305, 75-84: 201, 85+: 26
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gregory Ardigo, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Pantoprazole Sodium
Pantoprazole Sodium
350 claims
- Peg 3350-Electrolyte 105
Peg 3350-Electrolyte
105 claims
- Mesalamine 66
Mesalamine
66 claims
- Omeprazole 42
Omeprazole
42 claims
- Sucralfate 34
Sucralfate
34 claims
- Diphenoxylate-Atro… 26
Diphenoxylate-Atropine
26 claims
- Famotidine 24
Famotidine
24 claims
- Xifaxan 22
Xifaxan
22 claims
| Drug | Claims |
|---|---|
| Pantoprazole Sodium | 350 |
| Peg 3350-Electrolyte Sodium Chloride/Nahco3/Kcl/Peg | 105 |
| Mesalamine | 66 |
| Omeprazole | 42 |
| Sucralfate | 34 |
| Diphenoxylate-Atropine Diphenoxylate Hcl/Atropine | 26 |
| Famotidine | 24 |
| Xifaxan Rifaximin | 22 |
| Balsalazide Disodium | 21 |
| Dexlansoprazole Dr Dexlansoprazole | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Gregory Ardigo, M.D. fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Gregory Ardigo, M.D.'s 1,282 claims are below the specialty average of 1,474.
Nearby Specialist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Ardigo.
Adrienne Abad Santos
San Francisco, CA
Dr. Brenda Abarca
MD
Torrance, CA
Dr. Fatemeh Abbasi
PT
Van Nuys, CA
Dr. Erlinda Abcede
M.D.
Cudahy, CA
Dr. Maher Abdallah
M.D.
Palm Springs, CA
Compare Specialist 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 Specialist 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore California
Frequently Asked Questions
What is Gregory Ardigo, M.D.'s specialty? ▼
Gregory Ardigo, M.D. specializes in Specialist and practices in Murrieta, California. Credentials: M.D..
How much does Gregory Ardigo, M.D. prescribe under Medicare Part D? ▼
In 2023, Gregory Ardigo, M.D. wrote 1,282 Medicare Part D claims totaling $635K in drug costs for 569 beneficiaries.
What is Gregory Ardigo, M.D.'s Medicare quality score? ▼
Gregory Ardigo, M.D. has a CMS MIPS Final Score of 89.2/100 (Quality: 78.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Gregory Ardigo, M.D. located? ▼
Gregory Ardigo, M.D. is located at 40404 CALIFORNIA OAKS RD, Murrieta, CA, 92562. Phone: (951) 600-0288.
What is Gregory Ardigo, M.D.'s NPI number? ▼
Gregory Ardigo, M.D.'s National Provider Identifier (NPI) is 1548353956, issued on 09/30/2006.
Does Gregory Ardigo, M.D. prescribe more brand-name or generic drugs? ▼
Gregory Ardigo, M.D.'s prescribing is 20% brand-name and 80% generic drugs by claim count, with $562K in brand drug costs.
Does Gregory Ardigo, M.D. prescribe opioids? ▼
Yes, Gregory Ardigo, M.D. had 18 opioid claims in 2023 with an opioid prescribing rate of 1.4%.
How many Specialist providers are there in the US? ▼
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Gregory Ardigo, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Ardigo, M.D.'s most frequently prescribed drugs include Pantoprazole Sodium, Peg 3350-Electrolyte, Mesalamine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Ardigo, M.D. accept Medicare? ▼
Gregory Ardigo, M.D. appears in CMS Medicare data with 1,282 Part D claims and 569 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Ardigo, M.D.'s credentials? ▼
Gregory Ardigo, M.D.'s NPI is 1548353956 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
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.