2026 NPPES data Physician Assistant NPI 1104896281 PA
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WARREN GUINN, PA

Physician Assistant in HENDERSON, Nevada. 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
10K
Medicare Part D claims · 1K beneficiaries · Physician Assistant avg: 790
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: WARREN GUINN, PA is a Physician Assistant ([object Object]) practicing in HENDERSON, Nevada with a Medicare Part D prescribing footprint of 10K claims across 1K beneficiaries — 10% brand-name prescribing .

What stands out: WARREN GUINN, PA filed 9,639 Medicare Part D claims in 2023 across HENDERSON, Nevada. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

WARREN GUINN, PA at a glance

Quality data not reported

NPI registry status

Active

Issued 01/23/2006

NPI 1104896281

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

9,639 1120% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Nevada

How Physician Assistant compares to other specialties among Nevada providers

Nevada providers

Physician Assistant share within Nevada

1. Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physician Assistant share within Nevada

Specialty board-certification context

Estimated specialty board-certified rate — Physician Assistant (ABMS / AOA reference)

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

Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Physician Assistant) — 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).

WARREN GUINN, PA is a Physician Assistant provider practicing in HENDERSON, Nevada, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA. NPI: 1104896281. 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.

WARREN GUINN, PA appears in the CMS NPPES registry as a Physician Assistant provider holding PA credentials at 270 W LAKE MEAD PKWY, HENDERSON, NV, 89015, with a listed phone of (702) 877-5199. NPI 1104896281 was issued on 01/23/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GUINN 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 9,639 prescription claims written by this provider, covering 1,227 Medicare beneficiaries and totaling roughly $752K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 3.9%. 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.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 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

270 W LAKE MEAD PKWY
HENDERSON, NV 89015

Provider Details

NPI 1104896281
Specialty Physician Assistant
Credentials PA
Gender Male
NPI Issued 01/23/2006

Hospital and facility affiliations

Facilities where WARREN GUINN, PA 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.

OPTUM MEDICAL GROUP II RHODES P C
HENDERSON, NV

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

WARREN GUINN, PA — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 9,639 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.

9,639
Total Claims
$752K
Total Drug Cost
1,227
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
23,147
Total Day Supply
678,026
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$571K
Generic Drug Cost
$177K
Opioid Claims
378 (3.9% rate)
Antibiotic Claims
160

Patient Demographics

Average Patient Age
73.0 years
Avg HCC Risk Score
1.96
Gender Split
59% female / 41% male
Age Distribution
<65: 126, 65-74: 577, 75-84: 417, 85+: 107

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
617
Amlodipine Besylate
370
Gabapentin
347
Lisinopril
332
Levothyroxine Sodium
329
Omeprazole
256
Losartan Potassium
233
Metformin Hcl
198
Metoprolol Succinate
187
Trazodone Hcl
183

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

Physician Assistant Overview

How WARREN GUINN, PA fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

WARREN GUINN, PA's 9,639 claims are above the specialty average of 790.

Nearby Physician Assistant Providers in Nevada

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

Compare Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is WARREN GUINN, PA's specialty?
WARREN GUINN, PA specializes in Physician Assistant and practices in HENDERSON, Nevada. Credentials: PA.
How much does WARREN GUINN, PA prescribe under Medicare Part D?
In 2023, WARREN GUINN, PA wrote 9,639 Medicare Part D claims totaling $752K in drug costs for 1,227 beneficiaries.
Where is WARREN GUINN, PA located?
WARREN GUINN, PA is located at 270 W LAKE MEAD PKWY, HENDERSON, NV, 89015. Phone: (702) 877-5199.
What is WARREN GUINN, PA's NPI number?
WARREN GUINN, PA's National Provider Identifier (NPI) is 1104896281, issued on 01/23/2006.
Does WARREN GUINN, PA prescribe more brand-name or generic drugs?
WARREN GUINN, PA's prescribing is 10% brand-name and 90% generic drugs by claim count, with $571K in brand drug costs.
Does WARREN GUINN, PA prescribe opioids?
Yes, WARREN GUINN, PA had 378 opioid claims in 2023 with an opioid prescribing rate of 3.9%.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does WARREN GUINN, PA prescribe most often?
Based on 2023 Medicare Part D data, WARREN GUINN, PA's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WARREN GUINN, PA accept Medicare?
WARREN GUINN, PA appears in CMS Medicare data with 9,639 Part D claims and 1,227 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WARREN GUINN, PA's credentials?
WARREN GUINN, PA's NPI is 1104896281 with credentials PA. 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