2026 NPPES data Nurse Practitioner NPI 1427064344 NP
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JOY CHAPMAN, NP

Nurse Practitioner in OKOLONA, Mississippi. 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
3K
Medicare Part D claims · 217 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: JOY CHAPMAN, NP is a Nurse Practitioner ([object Object]) practicing in OKOLONA, Mississippi with a Medicare Part D prescribing footprint of 3K claims across 217 beneficiaries — 10% brand-name prescribing .

What stands out: JOY CHAPMAN, NP filed 3,098 Medicare Part D claims in 2023 across OKOLONA, Mississippi. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

JOY CHAPMAN, NP at a glance

Quality data not reported

NPI registry status

Active

Issued 07/31/2006

NPI 1427064344

Primary specialty

Nurse Practitioner

High-volume

87,227 US NPIs in this specialty

Medicare Part D claims

3,098 186% vs specialty avg

2023 prescription claims

Specialty avg: 1,084

Specialty distribution in Mississippi

How Nurse Practitioner compares to other specialties among Mississippi providers

Mississippi providers

Nurse Practitioner share within Mississippi

1. Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nurse Practitioner share within Mississippi

Specialty board-certification context

Estimated specialty board-certified rate — Nurse Practitioner (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Nurse Practitioner ABMS/AOA estimate

Est. board-certified rate (Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Nurse Practitioner) — ABMS / AOA estimate

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).

JOY CHAPMAN, NP is a Nurse Practitioner provider practicing in OKOLONA, Mississippi, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: NP. NPI: 1427064344. 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.

JOY CHAPMAN, NP appears in the CMS NPPES registry as a Nurse Practitioner provider holding NP credentials at 518 WEST DR, OKOLONA, MS, 38860, with a listed phone of (662) 447-6170. NPI 1427064344 was issued on 07/31/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHAPMAN 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 3,098 prescription claims written by this provider, covering 217 Medicare beneficiaries and totaling roughly $183K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 2.8%. 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.

Nurse Practitioner is a high-volume specialty nationwide, with 87,227 enrolled providers across 56 states and an average of 1,084 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

518 WEST DR
OKOLONA, MS 38860

Provider Details

NPI 1427064344
Specialty Nurse Practitioner
Credentials NP
Gender Female
NPI Issued 07/31/2006

Hospital and facility affiliations

Facilities where JOY CHAPMAN, NP 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.

ALTHEACARE LLC
VARDAMAN, MS

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

JOY CHAPMAN, NP — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 3,098 2023 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 2023.

3,098
Total Claims
$183K
Total Drug Cost
217
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,183
Total Day Supply
174,501
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$105K
Generic Drug Cost
$77K
Opioid Claims
87 (2.8% rate)
Antibiotic Claims
148

Patient Demographics

Average Patient Age
68.6 years
Avg HCC Risk Score
1.10
Gender Split
68% female / 32% male
Age Distribution
<65: 64, 65-74: 84, 75-84: 54, 85+: 15

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Amlodipine Besylate
98
Metoprolol Succinate
97
Levothyroxine Sodium
95
Famotidine
86
Gabapentin
84
Lisinopril
83
Albuterol Sulfate Hfa
Albuterol Sulfate
80
Potassium Chloride
63
Atorvastatin Calcium
62
Clozapine
60

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

Nurse Practitioner Overview

How JOY CHAPMAN, NP fits within the Nurse Practitioner landscape nationally.

87,227
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider

JOY CHAPMAN, NP's 3,098 claims are above the specialty average of 1,084.

Nearby Nurse Practitioner Providers in Mississippi

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

Compare Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is JOY CHAPMAN, NP's specialty?
JOY CHAPMAN, NP specializes in Nurse Practitioner and practices in OKOLONA, Mississippi. Credentials: NP.
How much does JOY CHAPMAN, NP prescribe under Medicare Part D?
In 2023, JOY CHAPMAN, NP wrote 3,098 Medicare Part D claims totaling $183K in drug costs for 217 beneficiaries.
Where is JOY CHAPMAN, NP located?
JOY CHAPMAN, NP is located at 518 WEST DR, OKOLONA, MS, 38860. Phone: (662) 447-6170.
What is JOY CHAPMAN, NP's NPI number?
JOY CHAPMAN, NP's National Provider Identifier (NPI) is 1427064344, issued on 07/31/2006.
Does JOY CHAPMAN, NP prescribe more brand-name or generic drugs?
JOY CHAPMAN, NP's prescribing is 10% brand-name and 90% generic drugs by claim count, with $105K in brand drug costs.
Does JOY CHAPMAN, NP prescribe opioids?
Yes, JOY CHAPMAN, NP had 87 opioid claims in 2023 with an opioid prescribing rate of 2.8%.
How many Nurse Practitioner providers are there in the US?
There are 87,227 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does JOY CHAPMAN, NP prescribe most often?
Based on 2023 Medicare Part D data, JOY CHAPMAN, NP's most frequently prescribed drugs include Amlodipine Besylate, Metoprolol Succinate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOY CHAPMAN, NP accept Medicare?
JOY CHAPMAN, NP appears in CMS Medicare data with 3,098 Part D claims and 217 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOY CHAPMAN, NP's credentials?
JOY CHAPMAN, NP's NPI is 1427064344 with credentials NP. 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