NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1104992536 ARNP
Verify on CMS → Gay Parker, ARNP
Family Nurse Practitioner in Muskogee, Oklahoma.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 210,832 in Family 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
4K
Medicare Part D claims · 198 beneficiaries · Family Nurse Practitioner avg: 1K
Generic prescribing
86%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$729.69
45 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Gay Parker, ARNP filed 4,132 Medicare Part D claims in 2023 as a Family Nurse Practitioner in Muskogee, Oklahoma, prescribing 86% generic.
- 4K
- Part D claims, 2023
- 86%
- generic prescribing
- $729.69
- industry payments (Sunshine Act)
- ≥92nd
- 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.
Gay Parker, ARNP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
4,132 ≥ 92nd percentile 92% 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 Gay Parker, ARNP?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Medicare Part D claims
4,132 238% vs specialty avg
Specialty distribution in Oklahoma
How Family Nurse Practitioner compares to other specialties among Oklahoma 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 Family 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).
Gay Parker, ARNP appears in the CMS NPPES registry as a Family Nurse Practitioner provider holding ARNP credentials at 3300 CHANDLER RD, Muskogee, OK, 74403, with a listed phone of (918) 681-3333. NPI 1104992536 was issued on 11/28/2006.
Medicare Part D records for calendar year 2023 show 4,132 prescription claims written by this provider, covering 198 Medicare beneficiaries and totaling roughly $413K in drug spend, split 13% brand-name and 86% generic by claim count, with an opioid prescribing rate of 2.3%.
Family Nurse Practitioner is a high-volume specialty nationwide, with 210,832 enrolled providers across 56 states and an average of 1,222 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
Provider Details
| NPI | 1104992536 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | ARNP |
| Gender | Female |
| NPI Issued | 11/28/2006 |
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 Gay Parker, ARNP. Source: openpaymentsdata.cms.gov.
Total received
$730
Largest payer
AstraZeneca Pharmaceuticals LP
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.
Brand vs generic prescribing mix · Typical
Gay Parker, ARNP - brand share 13.0%
Family Nurse Practitioner average
13% brand-name claims vs 86% generic, on 4,132 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.
4,132
Total Claims
$413K
Total Drug Cost
198
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,721
- Total Day Supply
- 223,330
- Brand vs Generic
- 13% brand / 86% generic
- Brand Drug Cost
- $341K
- Generic Drug Cost
- $71K
- Opioid Claims
- 94 (2.3% rate)
- Antibiotic Claims
- 119
Patient Demographics
- Average Patient Age
- 72.1 years
- Avg HCC Risk Score
- 0.88
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 26, 65-74: 92, 75-84: 62, 85+: 18
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gay Parker, ARNP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
278 claims
- Amlodipine Besylate
Amlodipine Besylate
134 claims
- Alprazolam
Alprazolam
117 claims
- Pravastatin Sodium 110
Pravastatin Sodium
110 claims
- Atorvastatin Calcium 109
Atorvastatin Calcium
109 claims
- Metformin Hcl 106
Metformin Hcl
106 claims
- Metoprolol Tartrate 92
Metoprolol Tartrate
92 claims
- Hydrochlorothiazide 91
Hydrochlorothiazide
91 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 278 |
| Amlodipine Besylate | 134 |
| Alprazolam | 117 |
| Pravastatin Sodium | 110 |
| Atorvastatin Calcium | 109 |
| Metformin Hcl | 106 |
| Metoprolol Tartrate | 92 |
| Hydrochlorothiazide | 91 |
| Rosuvastatin Calcium | 87 |
| Losartan Potassium | 82 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Gay Parker, ARNP fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Gay Parker, ARNP's 4,132 claims are above the specialty average of 1,222.
Nearby Family Nurse Practitioner Providers in Oklahoma
Other clinicians with the same primary specialty enrolled in Oklahoma, drawn from the same CMS NPPES roster as Parker.
Dr. Melissa Abbott
DNP, APRN, FNP-C
Tulsa, OK
Dr. Bincy Abraham
NURSE PRACTITIONER
Oklahoma City, OK
Dr. Ligi Abraham
APRN CNP
Oklahoma City, OK
Dr. Susan Abrahamsen
APRN
El Reno, OK
Dr. Silas Abrenica
FNP
Fort Sill, OK
Compare Family Nurse Practitioner 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 Oklahoma medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Nurse Practitioner 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Oklahoma
Frequently Asked Questions
What is Gay Parker, ARNP's specialty? ▼
Gay Parker, ARNP specializes in Family Nurse Practitioner and practices in Muskogee, Oklahoma. Credentials: ARNP.
How much does Gay Parker, ARNP prescribe under Medicare Part D? ▼
In 2023, Gay Parker, ARNP wrote 4,132 Medicare Part D claims totaling $413K in drug costs for 198 beneficiaries.
Where is Gay Parker, ARNP located? ▼
Gay Parker, ARNP is located at 3300 CHANDLER RD, Muskogee, OK, 74403. Phone: (918) 681-3333.
What is Gay Parker, ARNP's NPI number? ▼
Gay Parker, ARNP's National Provider Identifier (NPI) is 1104992536, issued on 11/28/2006.
Does Gay Parker, ARNP prescribe more brand-name or generic drugs? ▼
Gay Parker, ARNP's prescribing is 13% brand-name and 86% generic drugs by claim count, with $341K in brand drug costs.
Does Gay Parker, ARNP prescribe opioids? ▼
Yes, Gay Parker, ARNP had 94 opioid claims in 2023 with an opioid prescribing rate of 2.3%.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Gay Parker, ARNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Gay Parker, ARNP's most frequently prescribed drugs include Levothyroxine Sodium, Amlodipine Besylate, Alprazolam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gay Parker, ARNP accept Medicare? ▼
Gay Parker, ARNP appears in CMS Medicare data with 4,132 Part D claims and 198 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gay Parker, ARNP's credentials? ▼
Gay Parker, ARNP's NPI is 1104992536 with credentials ARNP. 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.