NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1730286865 MD
Verify on CMS → John Warwick, MD
Family Medicine Physician in Modesto, 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 147,760 in Family 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
8K
Medicare Part D claims · 564 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
0/100
▼ 84 pts below national avg 83.5 · Penalty band
Industry payments
$337.79
16 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
John Warwick, MD reported a CMS MIPS final score of 0/100 - below the 83.5 national average - and filed 7,906 Medicare Part D claims in 2023.
- 0/100
- MIPS score · -83 vs avg
- 8K
- Part D claims, 2023
- 88%
- 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.
John Warwick, MD'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.
0 ≥ 0th percentile 0% 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 John Warwick, MD sits
This provider among family medicine physician peers
Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, John Warwick, MD writes more Part D claims than 82% of them and scores higher on MIPS quality than 0% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is John Warwick, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
John Warwick, MD 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 John Warwick, MD?
Below national averagePrimary specialty
Family Medicine Physician
Medicare Part D claims
7,906 131% vs specialty avg
MIPS final score
0/100 83.5 pts vs avg
Specialty distribution in California
How Family Medicine Physician compares to other specialties among California providers
Medicare quality performance, MIPS
John Warwick, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 0/100
- 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).
John Warwick, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 205 WEST GRANGER AVE, Modesto, CA, 95350, with a listed phone of (209) 579-9930. NPI 1730286865 was issued on 09/20/2006.
Medicare Part D records for calendar year 2023 show 7,906 prescription claims written by this provider, covering 564 Medicare beneficiaries and totaling roughly $685K in drug spend, split 11% brand-name and 88% generic by claim count, with an opioid prescribing rate of 4.3%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 0/100 for the 2023 performance year (Quality 0), compared with the 83.5 average among clinicians with a measured score.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 enrolled providers across 56 states and an average of 3,418 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 | 1730286865 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/20/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
0
Final Score
Measured-score avg: 83.5
0
Quality
Reporting: Individual
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 John Warwick, MD. Source: openpaymentsdata.cms.gov.
Total received
$338
Largest payer
AstraZeneca Pharmaceuticals LP
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 John Warwick, MD. To verify John Warwick, MD'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
John Warwick, MD - brand share 11.0%
Family Medicine Physician average
11% brand-name claims vs 88% generic, on 7,906 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.
7,906
Total Claims
$685K
Total Drug Cost
564
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 18,185
- Total Day Supply
- 529,923
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $495K
- Generic Drug Cost
- $187K
- Opioid Claims
- 342 (4.3% rate)
- Antibiotic Claims
- 325
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 1.14
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 36, 65-74: 308, 75-84: 171, 85+: 49
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Warwick, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
357 claims
- Losartan Potassium
Losartan Potassium
355 claims
- Atorvastatin Calcium
Atorvastatin Calcium
336 claims
- Amlodipine Besylate
Amlodipine Besylate
319 claims
- Lisinopril
Lisinopril
303 claims
- Tamsulosin Hcl
Tamsulosin Hcl
246 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
204 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
199 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 357 |
| Losartan Potassium | 355 |
| Atorvastatin Calcium | 336 |
| Amlodipine Besylate | 319 |
| Lisinopril | 303 |
| Tamsulosin Hcl | 246 |
| Rosuvastatin Calcium | 204 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 199 |
| Metformin Hcl | 180 |
| Hydrochlorothiazide | 173 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How John Warwick, MD fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
John Warwick, MD's 7,906 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Warwick.
One of 15,933 Family Medicine Physician providers enrolled in California, 5 are shown here.
Dr. Omer Aba-Omer
MD
Santa Monica, CA
Dr. Michelle Ababa
MD
Wilmington, CA
Dr. Anna Tzeitel Abalos
MD
Roseville, CA
Dr. Adan Abarca
MD
Anaheim, CA
Dr. Lorraine Abate
M.D.
Sacramento, CA
Compare Family 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 Family 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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How insurance networks affect your costs
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Frequently Asked Questions
What is John Warwick, MD's specialty? ▼
John Warwick, MD specializes in Family Medicine Physician and practices in Modesto, California. Credentials: MD.
How much does John Warwick, MD prescribe under Medicare Part D? ▼
In 2023, John Warwick, MD wrote 7,906 Medicare Part D claims totaling $685K in drug costs for 564 beneficiaries.
What is John Warwick, MD's Medicare quality score? ▼
John Warwick, MD has a CMS MIPS Final Score of 0/100 (Quality: 0). 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 John Warwick, MD located? ▼
John Warwick, MD is located at 205 WEST GRANGER AVE, Modesto, CA, 95350. Phone: (209) 579-9930.
What is John Warwick, MD's NPI number? ▼
John Warwick, MD's National Provider Identifier (NPI) is 1730286865, issued on 09/20/2006.
Does John Warwick, MD prescribe more brand-name or generic drugs? ▼
John Warwick, MD's prescribing is 11% brand-name and 88% generic drugs by claim count, with $495K in brand drug costs.
Does John Warwick, MD prescribe opioids? ▼
Yes, John Warwick, MD had 342 opioid claims in 2023 with an opioid prescribing rate of 4.3%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does John Warwick, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, John Warwick, MD's most frequently prescribed drugs include Levothyroxine Sodium, Losartan Potassium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Warwick, MD accept Medicare? ▼
John Warwick, MD appears in CMS Medicare data with 7,906 Part D claims and 564 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Warwick, MD's credentials? ▼
John Warwick, MD's NPI is 1730286865 with credentials MD. 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.