2026 NPPES data Physician Assistant NPI 1699900985 PA C
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RACHEL WITHERS, PA C

Physician Assistant in WAILUKU, Hawaii. 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
519
Medicare Part D claims · 268 beneficiaries · Physician Assistant avg: 790
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

RACHEL WITHERS, PA C filed 519 Medicare Part D claims in 2023 as a Physician Assistant in WAILUKU, Hawaii, prescribing 92% generic.

519
Part D claims, 2023
92%
generic prescribing

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.

RACHEL WITHERS, PA C's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

519 Top 34% higher than 66% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about RACHEL WITHERS, PA C?

Quality data not reported

NPI registry status

Active

Issued 05/15/2009

NPI 1699900985

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

519 34% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Hawaii

How Physician Assistant compares to other specialties among Hawaii providers

Hawaii providers

Physician Assistant share within Hawaii

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

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).

RACHEL WITHERS, PA C appears in the CMS NPPES registry as a Physician Assistant provider holding PA C credentials at 55 MAUI LANI PKWY, WAILUKU, HI, 96793, with a listed phone of (808) 243-6050. NPI 1699900985 was issued on 05/15/2009. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WITHERS 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 519 prescription claims written by this provider, covering 268 Medicare beneficiaries and totaling roughly $25K in drug spend, split 8% brand-name and 92% generic by claim count, with an opioid prescribing rate of 2.7%. 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

55 MAUI LANI PKWY
WAILUKU, HI 96793

Provider Details

NPI 1699900985
Specialty Physician Assistant
Credentials PA C
Gender Female
NPI Issued 05/15/2009

Hospital and facility affiliations

Facilities where RACHEL WITHERS, PA C 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.

HAWAII PERMANENTE MEDICAL GROUP INC
HONOLULU, HI

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 · Generic-heavy

RACHEL WITHERS, PA C — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 519 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.

519
Total Claims
$25K
Total Drug Cost
268
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
627
Total Day Supply
11,926
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$16K
Generic Drug Cost
$9K
Opioid Claims
14 (2.7% rate)
Antibiotic Claims
131

Patient Demographics

Average Patient Age
74.9 years
Avg HCC Risk Score
1.45
Gender Split
59% female / 41% male

Top Prescribed Drugs (Medicare Part D)

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

What RACHEL WITHERS, PA C 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
Prednisone
70
Azithromycin
33
Doxycycline Monohydrate
27
Mupirocin
26
Albuterol Sulfate Hfa
Albuterol Sulfate
24
Clobetasol Propionate
22
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
20
Fluconazole
17
Cephalexin
15
Cefpodoxime Proxetil
14

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

Physician Assistant Overview

How RACHEL WITHERS, PA C fits within the Physician Assistant landscape nationally.

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

RACHEL WITHERS, PA C's 519 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in Hawaii

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

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

Frequently Asked Questions

What is RACHEL WITHERS, PA C's specialty?
RACHEL WITHERS, PA C specializes in Physician Assistant and practices in WAILUKU, Hawaii. Credentials: PA C.
How much does RACHEL WITHERS, PA C prescribe under Medicare Part D?
In 2023, RACHEL WITHERS, PA C wrote 519 Medicare Part D claims totaling $25K in drug costs for 268 beneficiaries.
Where is RACHEL WITHERS, PA C located?
RACHEL WITHERS, PA C is located at 55 MAUI LANI PKWY, WAILUKU, HI, 96793. Phone: (808) 243-6050.
What is RACHEL WITHERS, PA C's NPI number?
RACHEL WITHERS, PA C's National Provider Identifier (NPI) is 1699900985, issued on 05/15/2009.
Does RACHEL WITHERS, PA C prescribe more brand-name or generic drugs?
RACHEL WITHERS, PA C's prescribing is 8% brand-name and 92% generic drugs by claim count, with $16K in brand drug costs.
Does RACHEL WITHERS, PA C prescribe opioids?
Yes, RACHEL WITHERS, PA C had 14 opioid claims in 2023 with an opioid prescribing rate of 2.7%.
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 RACHEL WITHERS, PA C prescribe most often?
Based on 2023 Medicare Part D data, RACHEL WITHERS, PA C's most frequently prescribed drugs include Prednisone, Azithromycin, Doxycycline Monohydrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RACHEL WITHERS, PA C accept Medicare?
RACHEL WITHERS, PA C appears in CMS Medicare data with 519 Part D claims and 268 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RACHEL WITHERS, PA C's credentials?
RACHEL WITHERS, PA C's NPI is 1699900985 with credentials PA C. 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