NPI registry status
Active
2026 NPPES data Obstetrics & Gynecology Physician NPI 1649595281 M.D.
Verify on CMS → O'Neil Parenton, M.D.
Obstetrics & Gynecology Physician in Baton Rouge, 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 45,074 in Obstetrics & Gynecology 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
595
Medicare Part D claims · 160 beneficiaries · Obstetrics & Gynecology Physician avg: 188
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
90.9/100
▲ 7 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
O'Neil Parenton, M.D. reported a CMS MIPS final score of 90.9/100 - above the 83.5 national average - and filed 595 Medicare Part D claims in 2024.
- 90.9/100
- MIPS score · +7 vs avg
- 595
- Part D claims, 2024
- 89%
- 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.
Federal trust snapshot
What official records show about O'Neil Parenton, 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 1649595281), first enumerated 04/06/2010.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 595 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 90.9/100 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.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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 1649595281 · Obstetrics & Gynecology Physician
NPI-10 · ENUM-MID · TAX-MID · MIPS-ABOVE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1649595281
- ENUM-MID 2010
- TAX-MID 45K Obstetrics &
- MIPS-ABOVE 90.9/100
- RX-LIGHT 595
- BOOK-LIGHT 599 in Louisiana
- PHOTO-FINISH Praveena Arya · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Parenton · this …
Parenton · this provider
90.9 MIPS pts
- Lan Tran · highest
Lan Tran
90.9 MIPS pts
- Praveena Arya · …
Praveena Arya
90.9 MIPS pts
- Mark Conway · near
Mark Conway
90.9 MIPS pts
- Alison Madden · …
Alison Madden
90.9 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
O'Neil Parenton, 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.
91 ≥ 58th percentile 58% 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 O'Neil Parenton, M.D. sits
This provider among obstetrics & gynecology physician peers
Across the 7,360 obstetrics & gynecology physician providers who report both Medicare Part D prescribing and a MIPS quality score, O'Neil Parenton, M.D. writes more Part D claims than 95% of them and scores higher on MIPS quality than 62% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one obstetrics & gynecology physician peer from a representative sample of 60; the gold marker is O'Neil Parenton, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
O'Neil Parenton, M.D. 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 O'Neil Parenton, M.D.?
High performer (top quartile)Primary specialty
Obstetrics & Gynecology Physician
Medicare Part D claims
595 216% vs specialty avg
MIPS final score
90.9/100 7.4 pts vs avg
Specialty distribution in Louisiana
How Obstetrics & Gynecology Physician compares to other specialties among Louisiana providers
Medicare quality performance, MIPS
O'Neil Parenton, M.D.'s 2023 MIPS final score plotted against the Obstetrics & Gynecology Physician national average
- MIPS Final Score
- 90.9/100
- 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 | 1649595281 |
|---|---|
| Specialty | Obstetrics & Gynecology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/06/2010 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
90.8557
Final Score
Measured-score avg: 83.5
90.2858
Quality
79.233
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where O'Neil Parenton, 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.
Louisiana Women's Healthcare Associates LLC
Baton Rouge, LA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
O'Neil Parenton, M.D. - brand share 11.0%
Obstetrics & Gynecology Physician average
11% brand-name claims vs 89% generic, on 595 2024 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 2024.
595
Total Claims
$33K
Total Drug Cost
160
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,257.7
- Total Day Supply
- 35,328
- Brand vs Generic
- 11% brand / 89% generic
- Brand Drug Cost
- $17K
- Generic Drug Cost
- $16K
- Opioid Claims
- 13 (2.2% rate)
- Antibiotic Claims
- 30
Patient Demographics
- Average Patient Age
- 69.8 years
- Avg HCC Risk Score
- 1.00
- Gender Split
- 100% female / 0% male
- Age Distribution
- <65: 27, 65-74: 82, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What O'Neil Parenton, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Estradiol
Estradiol
246 claims
- Medroxyprogesteron… 35
Medroxyprogesterone Acetate
35 claims
- Alendronate Sodium 34
Alendronate Sodium
34 claims
- Premarin 32
Premarin
32 claims
- Dotti 24
Dotti
24 claims
- Fluconazole 22
Fluconazole
22 claims
- Valacyclovir 17
Valacyclovir
17 claims
- Metronidazole 15
Metronidazole
15 claims
| Drug | Claims |
|---|---|
| Estradiol | 246 |
| Medroxyprogesterone Acetate | 35 |
| Alendronate Sodium | 34 |
| Premarin Estrogens, Conjugated | 32 |
| Dotti Estradiol | 24 |
| Fluconazole | 22 |
| Valacyclovir Valacyclovir Hcl | 17 |
| Metronidazole | 15 |
| Alprazolam | 14 |
| Ibuprofen | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Obstetrics & Gynecology Physician Overview
How O'Neil Parenton, M.D. fits within the Obstetrics & Gynecology Physician landscape nationally.
45,074
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
188
Avg Claims per Provider
O'Neil Parenton, M.D.'s 595 claims are above the specialty average of 188.
Nationwide Obstetrics & Gynecology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Parenton, both outside Louisiana so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (90.9 here).
Same NPPES enumeration year (2010)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Obstetrics & Gynecology Physician Providers in Louisiana
Other clinicians with the same primary specialty enrolled in Louisiana, drawn from the same CMS NPPES roster as Parenton.
One of 599 Obstetrics & Gynecology Physician providers enrolled in Louisiana, 5 are shown here.
Dr. Mathew Abrams
MD
Baton Rouge, LA
Dr. Rebecca Accardo
M.D.
Franklin, LA
Dr. Jason Adams
M.D.
Gonzales, LA
Dr. Gary Agena
M.D.
Madisonville, LA
Dr. Ramon Aizpurua
MD
Baton Rouge, LA
Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is O'Neil Parenton, M.D.'s specialty? ▼
O'Neil Parenton, M.D. specializes in Obstetrics & Gynecology Physician and practices in Baton Rouge, Louisiana. Credentials: M.D..
How much does O'Neil Parenton, M.D. prescribe under Medicare Part D? ▼
In 2024, O'Neil Parenton, M.D. wrote 595 Medicare Part D claims totaling $33K in drug costs for 160 beneficiaries.
What is O'Neil Parenton, M.D.'s Medicare quality score? ▼
O'Neil Parenton, M.D. has a CMS MIPS Final Score of 90.9/100 (Quality: 90.3, Cost: 79.2). 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 O'Neil Parenton, M.D. located? ▼
O'Neil Parenton, M.D. is located at 500 RUE DE LA VIE ST, Baton Rouge, LA, 70817. Phone: (225) 201-2000.
What is O'Neil Parenton, M.D.'s NPI number? ▼
O'Neil Parenton, M.D.'s National Provider Identifier (NPI) is 1649595281, issued on 04/06/2010.
Does O'Neil Parenton, M.D. prescribe more brand-name or generic drugs? ▼
O'Neil Parenton, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $17K in brand drug costs.
Does O'Neil Parenton, M.D. prescribe opioids? ▼
Yes, O'Neil Parenton, M.D. had 13 opioid claims in 2024 with an opioid prescribing rate of 2.2%.
How many Obstetrics & Gynecology Physician providers are there in the US? ▼
There are 45,074 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 188 Medicare Part D claims per year.
What drugs does O'Neil Parenton, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, O'Neil Parenton, M.D.'s most frequently prescribed drugs include Estradiol, Medroxyprogesterone Acetate, Alendronate Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does O'Neil Parenton, M.D. accept Medicare? ▼
O'Neil Parenton, M.D. appears in CMS Medicare data with 595 Part D claims and 160 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify O'Neil Parenton, M.D.'s credentials? ▼
O'Neil Parenton, M.D.'s NPI is 1649595281 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.