2026 NPPES data Psychiatric/Mental Health Nurse Practitioner NPI 1518001668 MN ARNP
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CAROL OAS, MN ARNP

Psychiatric/Mental Health Nurse Practitioner in PORT ANGELES, Washington. 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
264
Medicare Part D claims · 18 beneficiaries · Psychiatric/Mental Health Nurse Practitioner avg: 927

What the federal data shows

CAROL OAS, MN ARNP filed 264 Medicare Part D claims in 2023 as a Psychiatric/Mental Health Nurse Practitioner in PORT ANGELES, Washington.

264
Part D claims, 2023

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.

CAROL OAS, MN ARNP's Medicare Part D volume vs every U.S. prescriber

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

264 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 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 CAROL OAS, MN ARNP?

Quality data not reported

NPI registry status

Active

Issued 02/20/2007

NPI 1518001668

Primary specialty

Psychiatric/Mental Health Nurse Practitioner

Mid-sized

39,953 US NPIs in this specialty

Medicare Part D claims

264 72% vs specialty avg

2023 prescription claims

Specialty avg: 927

Specialty distribution in Washington

How Psychiatric/Mental Health Nurse Practitioner compares to other specialties among Washington providers

Washington providers

Psychiatric/Mental Health Nurse Practitioner share within Washington

1. Psychiatric/Mental Health Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Psychiatric/Mental Health Nurse Practitioner share within Washington

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Psychiatric/Mental Health 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).

CAROL OAS, MN ARNP appears in the CMS NPPES registry as a Psychiatric/Mental Health Nurse Practitioner provider holding MN ARNP credentials at 113 SO EUNICE ST, PORT ANGELES, WA, 98362, with a listed phone of (360) 460-3836. NPI 1518001668 was issued on 02/20/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what OAS 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 264 prescription claims written by this provider, covering 18 Medicare beneficiaries and totaling roughly $6K in drug spend. 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.

Psychiatric/Mental Health Nurse Practitioner is a mid-sized specialty nationwide, with 39,953 enrolled providers across 54 states and an average of 927 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

113 SO EUNICE ST
PORT ANGELES, WA 98362

Provider Details

NPI 1518001668
Specialty Psychiatric/Mental Health Nurse Practitioner
Credentials MN ARNP
Gender Female
NPI Issued 02/20/2007

License & disciplinary context — Washington WMC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~34K Washington medical licensees in 2023 — they are NOT specific to CAROL OAS, MN ARNP. To verify CAROL OAS, MN ARNP's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases

WMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

264
Total Claims
$6K
Total Drug Cost
18
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
364
Total Day Supply
10,830
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
67.7 years
Avg HCC Risk Score
0.68

Top Prescribed Drugs (Medicare Part D)

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

What CAROL OAS, MN ARNP 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
Lorazepam
51
Fluoxetine Hcl
28
Risperidone
20
Lithium Carbonate Er
Lithium Carbonate
19
Bupropion Xl
Bupropion Hcl
16
Clonazepam
12
Diazepam
12
Trazodone Hcl
12
Lithium Carbonate
11

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

Psychiatric/Mental Health Nurse Practitioner Overview

How CAROL OAS, MN ARNP fits within the Psychiatric/Mental Health Nurse Practitioner landscape nationally.

39,953
Psychiatric/Mental Health Nurse Practitioner Providers in US
54
States with Psychiatric/Mental Health Nurse Practitioner
927
Avg Claims per Provider

CAROL OAS, MN ARNP's 264 claims are below the specialty average of 927.

Nearby Psychiatric/Mental Health Nurse Practitioner Providers in Washington

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

Compare Psychiatric/Mental Health Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is CAROL OAS, MN ARNP's specialty?
CAROL OAS, MN ARNP specializes in Psychiatric/Mental Health Nurse Practitioner and practices in PORT ANGELES, Washington. Credentials: MN ARNP.
How much does CAROL OAS, MN ARNP prescribe under Medicare Part D?
In 2023, CAROL OAS, MN ARNP wrote 264 Medicare Part D claims totaling $6K in drug costs for 18 beneficiaries.
Where is CAROL OAS, MN ARNP located?
CAROL OAS, MN ARNP is located at 113 SO EUNICE ST, PORT ANGELES, WA, 98362. Phone: (360) 460-3836.
What is CAROL OAS, MN ARNP's NPI number?
CAROL OAS, MN ARNP's National Provider Identifier (NPI) is 1518001668, issued on 02/20/2007.
How many Psychiatric/Mental Health Nurse Practitioner providers are there in the US?
There are 39,953 Psychiatric/Mental Health Nurse Practitioner providers across 54 states in the US. The average Psychiatric/Mental Health Nurse Practitioner provider writes 927 Medicare Part D claims per year.
What drugs does CAROL OAS, MN ARNP prescribe most often?
Based on 2023 Medicare Part D data, CAROL OAS, MN ARNP's most frequently prescribed drugs include Lorazepam, Fluoxetine Hcl, Risperidone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CAROL OAS, MN ARNP accept Medicare?
CAROL OAS, MN ARNP appears in CMS Medicare data with 264 Part D claims and 18 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CAROL OAS, MN ARNP's credentials?
CAROL OAS, MN ARNP's NPI is 1518001668 with credentials MN 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

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