2026 NPPES data Obstetrics & Gynecology Physician NPI 1164751525 MD
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JUAN CORNEJO, MD

Obstetrics & Gynecology Physician in DUNCAN, Oklahoma. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
161
Medicare Part D claims · 46 beneficiaries · Obstetrics & Gynecology Physician avg: 179
MIPS score
91.1858/100
▲ 8 pts above national avg 83.1 · [object Object]
What the federal data reveals: JUAN CORNEJO, MD is a Obstetrics & Gynecology Physician ([object Object]) practicing in DUNCAN, Oklahoma with a Medicare Part D prescribing footprint of 161 claims across 46 beneficiaries . Their CMS MIPS Final Score of 91.1858/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: JUAN CORNEJO, MD reported a CMS MIPS final score of 91.1858 out of 100, above the 83.1 national average, and filed 161 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

JUAN CORNEJO, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

JUAN CORNEJO, MD at a glance

High performer (top quartile)

NPI registry status

Active

Issued 12/15/2009

NPI 1164751525

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

161 10% vs specialty avg

2023 prescription claims

Specialty avg: 179

MIPS final score

91.1858/100 8.085800000000006% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Oklahoma

How Obstetrics & Gynecology Physician compares to other specialties among Oklahoma providers

Oklahoma providers

Obstetrics & Gynecology Physician share within Oklahoma

1. Obstetrics & Gynecology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Obstetrics & Gynecology Physician share within Oklahoma

Medicare quality performance — MIPS

JUAN CORNEJO, MD's 2023 MIPS final score plotted against the Obstetrics & Gynecology Physician national average

High performer (top quartile)
MIPS Final Score
91.1858/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Obstetrics & Gynecology Physician) — 91.1858/100 vs national avg 83.1

0%100%National avg83%91.2%
MIPS final score (Obstetrics & Gynecology Physician) — 91.1858/100 vs national avg 83.1

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).

JUAN CORNEJO, MD is a Obstetrics & Gynecology Physician provider practicing in DUNCAN, Oklahoma, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1164751525. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

JUAN CORNEJO, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 2515 WHISENANT DRIVE, DUNCAN, OK, 73533, with a listed phone of (580) 255-2229. NPI 1164751525 was issued on 12/15/2009. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CORNEJO most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 161 prescription claims written by this provider, covering 46 Medicare beneficiaries and totaling roughly $16K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.1858/100 for the 2023 performance year (Quality 79.2714), compared with the national average of 83.1.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 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

2515 WHISENANT DRIVE
DUNCAN, OK 73533

Provider Details

NPI 1164751525
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Male
NPI Issued 12/15/2009

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

91.1858
Final Score
Avg: 83.1
79.2714
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where JUAN CORNEJO, MD 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.

DUNCAN REGIONAL HOSPITAL, INC
★★★☆☆ 3/5
DUNCAN, OK
Acute Care Hospitals
CMS CCN: 370023
SOLUTIONS PRACTICE MANAGEMENT
CHICKASHA, OK

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

161
Total Claims
$16K
Total Drug Cost
46
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
213
Total Day Supply
5,393
Generic Drug Cost
$7K
Antibiotic Claims
21

Patient Demographics

Average Patient Age
65.5 years
Avg HCC Risk Score
1.08
Gender Split
100% female / 0% male
Age Distribution
<65: 17, 65-74: 18, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Estradiol
24
Tolterodine Tartrate Er
Tolterodine Tartrate
17
Dotti
Estradiol
12
Myrbetriq
Mirabegron
11
Oxybutynin Chloride Er
Oxybutynin Chloride
11

* 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 JUAN CORNEJO, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

JUAN CORNEJO, MD's 161 claims are below the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in Oklahoma

Other clinicians with the same primary specialty enrolled in Oklahoma, drawn from the same CMS NPPES roster as CORNEJO.

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JUAN CORNEJO, MD's specialty?
JUAN CORNEJO, MD specializes in Obstetrics & Gynecology Physician and practices in DUNCAN, Oklahoma. Credentials: MD.
How much does JUAN CORNEJO, MD prescribe under Medicare Part D?
In 2023, JUAN CORNEJO, MD wrote 161 Medicare Part D claims totaling $16K in drug costs for 46 beneficiaries.
What is JUAN CORNEJO, MD's Medicare quality score?
JUAN CORNEJO, MD has a CMS MIPS Final Score of 91.1858/100 (Quality: 79.2714). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is JUAN CORNEJO, MD located?
JUAN CORNEJO, MD is located at 2515 WHISENANT DRIVE, DUNCAN, OK, 73533. Phone: (580) 255-2229.
What is JUAN CORNEJO, MD's NPI number?
JUAN CORNEJO, MD's National Provider Identifier (NPI) is 1164751525, issued on 12/15/2009.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does JUAN CORNEJO, MD prescribe most often?
Based on 2023 Medicare Part D data, JUAN CORNEJO, MD's most frequently prescribed drugs include Estradiol, Tolterodine Tartrate Er, Dotti. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JUAN CORNEJO, MD accept Medicare?
JUAN CORNEJO, MD appears in CMS Medicare data with 161 Part D claims and 46 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JUAN CORNEJO, MD's credentials?
JUAN CORNEJO, MD's NPI is 1164751525 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

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