NPI registry status
Active
2026 NPPES data Hematology & Oncology Physician NPI 1003887100 M.D.
Verify on CMS → John Rainey, M.D.
Hematology & Oncology Physician in Lafayette, Louisiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,215 in Hematology & Oncology 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
418
Medicare Part D claims · 22 beneficiaries · Hematology & Oncology Physician avg: 847
Industry payments
$23.21
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
John Rainey, M.D. filed 418 Medicare Part D claims in 2023 as a Hematology & Oncology Physician in Lafayette, Louisiana.
- 418
- Part D claims, 2023
- $23.21
- 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.
John Rainey, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
418 Top 38% higher than 62% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
John Rainey, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about John Rainey, M.D.?
Quality data not reportedPrimary specialty
Hematology & Oncology Physician
Medicare Part D claims
418 51% vs specialty avg
Specialty distribution in Louisiana
How Hematology & Oncology Physician compares to other specialties among Louisiana providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Hematology & Oncology Physician. Verify directly:
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 Rainey, M.D. appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding M.D. credentials at 501 W SAINT MARY BLVD, Lafayette, LA, 70506, with a listed phone of (337) 235-7898. NPI 1003887100 was issued on 01/28/2006.
Medicare Part D records for calendar year 2023 show 418 prescription claims written by this provider, covering 22 Medicare beneficiaries and totaling roughly $29K in drug spend, with an opioid prescribing rate of 4.8%.
Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,215 enrolled providers across 54 states and an average of 847 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 | 1003887100 |
|---|---|
| Specialty | Hematology & Oncology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 01/28/2006 |
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 Rainey, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$23
Largest payer
Phathom Pharmaceuticals, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
418
Total Claims
$29K
Total Drug Cost
22
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 458
- Total Day Supply
- 10,506
- Generic Drug Cost
- $7K
- Opioid Claims
- 20 (4.8% rate)
- Antibiotic Claims
- 21
Patient Demographics
- Average Patient Age
- 76.6 years
- Avg HCC Risk Score
- 1.94
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Rainey, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Jardiance
Jardiance
20 claims
- Pantoprazole Sodium
Pantoprazole Sodium
18 claims
- Tramadol Hcl
Tramadol Hcl
18 claims
- Amlodipine Besylate
Amlodipine Besylate
17 claims
- Tradjenta
Tradjenta
15 claims
- Atorvastatin Calcium
Atorvastatin Calcium
14 claims
- Fluoxetine Hcl
Fluoxetine Hcl
13 claims
- Mirtazapine
Mirtazapine
13 claims
| Drug | Claims |
|---|---|
| Jardiance Empagliflozin | 20 |
| Pantoprazole Sodium | 18 |
| Tramadol Hcl | 18 |
| Amlodipine Besylate | 17 |
| Tradjenta Linagliptin | 15 |
| Atorvastatin Calcium | 14 |
| Fluoxetine Hcl | 13 |
| Mirtazapine | 13 |
| Fluticasone Propionate | 11 |
| Furosemide | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hematology & Oncology Physician Overview
How John Rainey, M.D. fits within the Hematology & Oncology Physician landscape nationally.
11,215
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider
John Rainey, M.D.'s 418 claims are below the specialty average of 847.
Nearby Hematology & Oncology Physician Providers in Louisiana
Other clinicians with the same primary specialty enrolled in Louisiana, drawn from the same CMS NPPES roster as Rainey.
Dr. Hossam Abdel-Rahman
MEDIAL DOCTOR
Mamou, LA
Dr. Deborah Abernathy
MD
Baton Rouge, LA
Dr. Bassam Abi-Rached
M.D.
Alexandria, LA
Dr. Sudhir Aggarwal
M.D.
Lafayette, LA
Dr. Heather Alva
MD
New Orleans, LA
Compare Hematology & Oncology 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 Louisiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hematology & Oncology 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 John Rainey, M.D.'s specialty? ▼
John Rainey, M.D. specializes in Hematology & Oncology Physician and practices in Lafayette, Louisiana. Credentials: M.D..
How much does John Rainey, M.D. prescribe under Medicare Part D? ▼
In 2023, John Rainey, M.D. wrote 418 Medicare Part D claims totaling $29K in drug costs for 22 beneficiaries.
Where is John Rainey, M.D. located? ▼
John Rainey, M.D. is located at 501 W SAINT MARY BLVD, Lafayette, LA, 70506. Phone: (337) 235-7898.
What is John Rainey, M.D.'s NPI number? ▼
John Rainey, M.D.'s National Provider Identifier (NPI) is 1003887100, issued on 01/28/2006.
Does John Rainey, M.D. prescribe opioids? ▼
Yes, John Rainey, M.D. had 20 opioid claims in 2023 with an opioid prescribing rate of 4.8%.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,215 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does John Rainey, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, John Rainey, M.D.'s most frequently prescribed drugs include Jardiance, Pantoprazole Sodium, Tramadol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Rainey, M.D. accept Medicare? ▼
John Rainey, M.D. appears in CMS Medicare data with 418 Part D claims and 22 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Rainey, M.D.'s credentials? ▼
John Rainey, M.D.'s NPI is 1003887100 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.
- 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.