NPI registry status
Active
2026 NPPES data Adult Health Nurse Practitioner NPI 1124764477 AGPC, NP
Verify on CMS → Shannon Grayek, AGPC, NP
Adult Health Nurse Practitioner in Chesterfield, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 29,519 in Adult Health Nurse Practitioner, 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
397
Medicare Part D claims · 98 beneficiaries · Adult Health Nurse Practitioner avg: 1K
What the federal data shows
Shannon Grayek, AGPC, NP filed 397 Medicare Part D claims in 2023 as an Adult Health Nurse Practitioner in Chesterfield, Missouri.
- 397
- Part D claims, 2023
- ≥57th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1124764477 · Adult Health Nurse Practitioner
NPI-10 · ENUM-RECENT · TAX-MID · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1124764477
- ENUM-RECENT 2022
- TAX-MID 30K Adult Health
- RX-LIGHT 397
- BOOK-LIGHT 733 in Missouri
- PHOTO-ENUM Kelley Qualters · 2022
Shannon Grayek, AGPC, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
397 ≥ 57th percentile 57% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Shannon Grayek, AGPC, NP?
Quality data not reportedPrimary specialty
Adult Health Nurse Practitioner
Medicare Part D claims
397 67% vs specialty avg
Specialty distribution in Missouri
How Adult Health Nurse Practitioner compares to other specialties among Missouri 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 Adult Health Nurse Practitioner. Verify directly:
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 | 1124764477 |
|---|---|
| Specialty | Adult Health Nurse Practitioner |
| Credentials | AGPC, NP |
| Gender | Female |
| NPI Issued | 05/10/2022 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
397
Total Claims
$70K
Total Drug Cost
98
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 664
- Total Day Supply
- 16,861
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 67
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 3.83
- Gender Split
- 67% female / 33% male
- Age Distribution
- <65: 22, 65-74: 36, 75-84: 27, 85+: 13
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Shannon Grayek, AGPC, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Furosemide
Furosemide
34 claims
- Jardiance
Jardiance
34 claims
- Prednisone
Prednisone
34 claims
- Spironolactone
Spironolactone
31 claims
- Losartan Potassium
Losartan Potassium
27 claims
- Doxycycline Hyclate 12
Doxycycline Hyclate
12 claims
- Metoprolol Succinate 11
Metoprolol Succinate
11 claims
| Drug | Claims |
|---|---|
| Furosemide | 34 |
| Jardiance Empagliflozin | 34 |
| Prednisone | 34 |
| Spironolactone | 31 |
| Losartan Potassium | 27 |
| Doxycycline Hyclate | 12 |
| Metoprolol Succinate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Adult Health Nurse Practitioner Overview
How Shannon Grayek, AGPC, NP fits within the Adult Health Nurse Practitioner landscape nationally.
29,519
Adult Health Nurse Practitioner Providers in US
55
States with Adult Health Nurse Practitioner
1,201
Avg Claims per Provider
Shannon Grayek, AGPC, NP's 397 claims are below the specialty average of 1,201.
Nationwide Adult Health Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Grayek, both outside Missouri so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2022)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Adult Health Nurse Practitioner Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Grayek.
One of 733 Adult Health Nurse Practitioner providers enrolled in Missouri, 5 are shown here.
Dr. Amber Abeln
ANP
Jefferson City, MO
Dr. Elizabeth Abernathy
N.P.
Saint Louis, MO
Dr. Maureen Abongo
DNP
Saint Louis, MO
Dr. Kimberly Adams
ANP
Columbia, MO
Dr. Joni Ahern
NP
Columbia, MO
Compare Adult Health Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Shannon Grayek, AGPC, NP's specialty? ▼
Shannon Grayek, AGPC, NP specializes in Adult Health Nurse Practitioner and practices in Chesterfield, Missouri. Credentials: AGPC, NP.
How much does Shannon Grayek, AGPC, NP prescribe under Medicare Part D? ▼
In 2023, Shannon Grayek, AGPC, NP wrote 397 Medicare Part D claims totaling $70K in drug costs for 98 beneficiaries.
Where is Shannon Grayek, AGPC, NP located? ▼
Shannon Grayek, AGPC, NP is located at 15740 S OUTER 40 RD, Chesterfield, MO, 63017. Phone: (636) 237-4700.
What is Shannon Grayek, AGPC, NP's NPI number? ▼
Shannon Grayek, AGPC, NP's National Provider Identifier (NPI) is 1124764477, issued on 05/10/2022.
How many Adult Health Nurse Practitioner providers are there in the US? ▼
There are 29,519 Adult Health Nurse Practitioner providers across 55 states in the US. The average Adult Health Nurse Practitioner provider writes 1,201 Medicare Part D claims per year.
What drugs does Shannon Grayek, AGPC, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Shannon Grayek, AGPC, NP's most frequently prescribed drugs include Furosemide, Jardiance, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Shannon Grayek, AGPC, NP accept Medicare? ▼
Shannon Grayek, AGPC, NP appears in CMS Medicare data with 397 Part D claims and 98 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Shannon Grayek, AGPC, NP's credentials? ▼
Shannon Grayek, AGPC, NP's NPI is 1124764477 with credentials AGPC, 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
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 (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
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 May 2026.