2026 NPPES data Hospitalist Physician NPI 1457677213 M.D.
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Gregory Hardin, M.D.

Hospitalist Physician in Louisville, Kentucky. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,825 in Hospitalist 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
438
Medicare Part D claims · 147 beneficiaries · Hospitalist Physician avg: 888
MIPS score
100/100
▲ 17 pts above national avg 83.1 · Exceptional
Industry payments
$26.49
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Gregory Hardin, M.D. reported a CMS MIPS final score of 100/100 - above the 83.1 national average - and filed 438 Medicare Part D claims in 2023.

100/100
MIPS score · +17 vs avg
438
Part D claims, 2023
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.

Gregory Hardin, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

100 Top 7% higher than 93% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90+: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored 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.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Gregory Hardin, M.D. sits

This provider among hospitalist physician peers

Across the 4,437 hospitalist physician providers who report both Medicare Part D prescribing and a MIPS quality score, Gregory Hardin, M.D. writes more Part D claims than 73% of them and scores higher on MIPS quality than 95% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.949.974.899.8Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 32Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 33Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 35Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 22Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 23Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 2Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 25Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 35Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 93Gregory Hardin, M.D.-Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 95
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one hospitalist physician peer from a representative sample of 60; the gold marker is Gregory Hardin, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

Board certification likely (heuristic, not verified)

Gregory Hardin, M.D. 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 Gregory Hardin, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 04/19/2010

NPI 1457677213

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

438 51% vs specialty avg

2023 prescription claims

Specialty avg: 888

MIPS final score

100/100 16.9 pts vs avg

Exceptional band

vs 83.1 national avg

Specialty distribution in Kentucky

How Hospitalist Physician compares to other specialties among Kentucky providers

Kentucky providers
Family Nurse Practitioner - 5.9%Family Nurse Practitioner5.9%Student in an Organized Health Care Education/Training Program - 5.2%Student in an Organized Health Care Education/Training Program5.2%Pharmacist - 4.8%Pharmacist4.8%Mental Health Counselor - 4.6%Mental Health Counselor4.6%Clinical Social Worker - 4.1%Clinical Social Worker4.1%Physical Therapist - 3.7%Physical Therapist3.7%Hospitalist Physician - 0.2%Hospitalist Physician0.2%
Largest specialties in Kentucky (% of in-state providers)

Medicare quality performance, MIPS

Gregory Hardin, M.D.'s 2023 MIPS final score plotted against the Hospitalist Physician national average

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

MIPS final score (Hospitalist Physician) - 100/100 vs national avg 83.1

0%100%National avg83%99%
MIPS final score (Hospitalist Physician) - 100/100 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).

Gregory Hardin, M.D. appears in the CMS NPPES registry as a Hospitalist Physician provider holding M.D. credentials at 312 S 4TH ST STE 700, Louisville, KY, 40202, with a listed phone of (502) 804-5495. NPI 1457677213 was issued on 04/19/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Hardin 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 438 prescription claims written by this provider, covering 147 Medicare beneficiaries and totaling roughly $35K 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 100/100 for the 2023 performance year (Quality 86.8), compared with the national average of 83.1.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

312 S 4TH ST STE 700
Louisville, KY 40202

Provider Details

NPI 1457677213
Specialty Hospitalist Physician
Credentials M.D.
Gender Male
NPI Issued 04/19/2010

CMS Quality Score (MIPS)

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

100
Final Score
Avg: 83.1
86.8066
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

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 Gregory Hardin, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$26

Largest payer

Penumbra, 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.

438
Total Claims
$35K
Total Drug Cost
147
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
775
Total Day Supply
20,861
Generic Drug Cost
$9K
Antibiotic Claims
40

Patient Demographics

Average Patient Age
75.5 years
Avg HCC Risk Score
2.37
Gender Split
52% female / 48% male
Age Distribution
<65: 20, 65-74: 42, 75-84: 56, 85+: 29

Top Prescribed Drugs (Medicare Part D)

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

What Gregory Hardin, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Amlodipine Besylate
29
Pantoprazole Sodium
28
Atorvastatin Calcium
20
Metoprolol Succinate
18
Furosemide
15
Torsemide
14
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
13
Clopidogrel
Clopidogrel Bisulfate
13
Carvedilol
11
Prednisone
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Hospitalist Physician Overview

How Gregory Hardin, M.D. fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

Gregory Hardin, M.D.'s 438 claims are below the specialty average of 888.

Nearby Hospitalist Physician Providers in Kentucky

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

Compare Hospitalist 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 Kentucky medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Hospitalist 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 Gregory Hardin, M.D.'s specialty?
Gregory Hardin, M.D. specializes in Hospitalist Physician and practices in Louisville, Kentucky. Credentials: M.D..
How much does Gregory Hardin, M.D. prescribe under Medicare Part D?
In 2023, Gregory Hardin, M.D. wrote 438 Medicare Part D claims totaling $35K in drug costs for 147 beneficiaries.
What is Gregory Hardin, M.D.'s Medicare quality score?
Gregory Hardin, M.D. has a CMS MIPS Final Score of 100/100 (Quality: 86.8). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Gregory Hardin, M.D. located?
Gregory Hardin, M.D. is located at 312 S 4TH ST STE 700, Louisville, KY, 40202. Phone: (502) 804-5495.
What is Gregory Hardin, M.D.'s NPI number?
Gregory Hardin, M.D.'s National Provider Identifier (NPI) is 1457677213, issued on 04/19/2010.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does Gregory Hardin, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Gregory Hardin, M.D.'s most frequently prescribed drugs include Amlodipine Besylate, Pantoprazole Sodium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Hardin, M.D. accept Medicare?
Gregory Hardin, M.D. appears in CMS Medicare data with 438 Part D claims and 147 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Hardin, M.D.'s credentials?
Gregory Hardin, M.D.'s NPI is 1457677213 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

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

Compiled from official public sources by the PlainDoctor editorial team.