2026 NPPES data Pediatric Cardiology Physician NPI 1164939658 MD
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Rachel Duncan, MD

Pediatric Cardiology Physician in Nashville, Tennessee. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 2,529 in Pediatric Cardiology 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
20
Medicare Part D claims · Pediatric Cardiology Physician avg: 77
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Rachel Duncan, MD filed 20 Medicare Part D claims in 2023 as a Pediatric Cardiology Physician in Nashville, Tennessee.

20
Part D claims, 2023

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.

Rachel Duncan, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023, across all CMS prescribers nationally

20 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

Rachel Duncan, MD 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 Rachel Duncan, MD?

Quality data not reported

NPI registry status

Active

Issued 01/05/2018

NPI 1164939658

Primary specialty

Pediatric Cardiology Physician

Niche

2,529 US NPIs in this specialty

Medicare Part D claims

20 74% vs specialty avg

2023 prescription claims

Specialty avg: 77

Specialty distribution in Tennessee

How Pediatric Cardiology Physician compares to other specialties among Tennessee providers

Tennessee providers
Family Nurse Practitioner - 6.4%Family Nurse Practitioner6.4%Pharmacist - 5.9%Pharmacist5.9%Student in an Organized Health Care Education/Training Program - 4.6%Student in an Organized Health Care Education/Training Program4.6%Physical Therapist - 4.2%Physical Therapist4.2%Behavior Technician - 4.2%Behavior Technician4.2%Registered Nurse - 3.9%Registered Nurse3.9%Pediatric Cardiology Physician - 0.1%Pediatric Cardiology Physician0.1%
Largest specialties in Tennessee (% of in-state 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 Pediatric Cardiology Physician. Verify directly:

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).

Rachel Duncan, MD appears in the CMS NPPES registry as a Pediatric Cardiology Physician provider holding MD credentials at 2200 CHILDREN'S WAY, Nashville, TN, 37232, with a listed phone of (615) 322-7447. NPI 1164939658 was issued on 01/05/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Duncan 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 20 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $11K 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.

Pediatric Cardiology Physician is a narrow specialty nationwide, with 2,529 enrolled providers across 51 states and an average of 77 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

2200 CHILDREN'S WAY
Nashville, TN 37232

Provider Details

NPI 1164939658
Specialty Pediatric Cardiology Physician
Credentials MD
Gender Female
NPI Issued 01/05/2018

Medicare Part D Prescribing Data

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

20
Total Claims
$11K
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
50
Total Day Supply
1,490
Generic Drug Cost
$440

Patient Demographics

Average Patient Age
66.9 years
Avg HCC Risk Score
1.54

Pediatric Cardiology Physician Overview

How Rachel Duncan, MD fits within the Pediatric Cardiology Physician landscape nationally.

2,529
Pediatric Cardiology Physician Providers in US
51
States with Pediatric Cardiology Physician
77
Avg Claims per Provider

Rachel Duncan, MD's 20 claims are below the specialty average of 77.

Nearby Pediatric Cardiology Physician Providers in Tennessee

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

Compare Pediatric Cardiology 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 Tennessee medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Pediatric Cardiology 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.

Frequently Asked Questions

What is Rachel Duncan, MD's specialty?
Rachel Duncan, MD specializes in Pediatric Cardiology Physician and practices in Nashville, Tennessee. Credentials: MD.
How much does Rachel Duncan, MD prescribe under Medicare Part D?
In 2023, Rachel Duncan, MD wrote 20 Medicare Part D claims totaling $11K in drug costs for N/A beneficiaries.
Where is Rachel Duncan, MD located?
Rachel Duncan, MD is located at 2200 CHILDREN'S WAY, Nashville, TN, 37232. Phone: (615) 322-7447.
What is Rachel Duncan, MD's NPI number?
Rachel Duncan, MD's National Provider Identifier (NPI) is 1164939658, issued on 01/05/2018.
How many Pediatric Cardiology Physician providers are there in the US?
There are 2,529 Pediatric Cardiology Physician providers across 51 states in the US. The average Pediatric Cardiology Physician provider writes 77 Medicare Part D claims per year.
Does Rachel Duncan, MD accept Medicare?
Rachel Duncan, MD appears in CMS Medicare data with 20 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Rachel Duncan, MD's credentials?
Rachel Duncan, MD's NPI is 1164939658 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.
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.