2026 NPPES data Registered Nurse NPI 1831278274 PMHNP
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CATHLEEN AHERN, PMHNP

Registered Nurse in PORTLAND, Oregon. 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
451
Medicare Part D claims · 14 beneficiaries · Registered Nurse avg: 1K
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: CATHLEEN AHERN, PMHNP is a Registered Nurse ([object Object]) practicing in PORTLAND, Oregon with a Medicare Part D prescribing footprint of 451 claims across 14 beneficiaries — 22% brand-name prescribing .

What stands out: CATHLEEN AHERN, PMHNP filed 451 Medicare Part D claims in 2023 across PORTLAND, Oregon. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

CATHLEEN AHERN, PMHNP at a glance

Quality data not reported

NPI registry status

Active

Issued 11/05/2006

NPI 1831278274

Primary specialty

Registered Nurse

High-volume

175,652 US NPIs in this specialty

Medicare Part D claims

451 55% vs specialty avg

2023 prescription claims

Specialty avg: 1,000

Specialty distribution in Oregon

How Registered Nurse compares to other specialties among Oregon providers

Oregon providers

Registered Nurse share within Oregon

1. Registered Nurse42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Registered Nurse share within Oregon

Specialty board-certification context

Estimated specialty board-certified rate — Registered Nurse (ABMS / AOA reference)

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

Est. board-certified rate (Registered Nurse) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Registered Nurse) — 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).

CATHLEEN AHERN, PMHNP is a Registered Nurse provider practicing in PORTLAND, Oregon, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PMHNP. NPI: 1831278274. 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.

CATHLEEN AHERN, PMHNP appears in the CMS NPPES registry as a Registered Nurse provider holding PMHNP credentials at 8383 NE SANDY BLVD, PORTLAND, OR, 97220, with a listed phone of (503) 253-0964. NPI 1831278274 was issued on 11/05/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AHERN 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 451 prescription claims written by this provider, covering 14 Medicare beneficiaries and totaling roughly $46K in drug spend, split 22% brand-name and 78% generic by claim count. 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.

Registered Nurse is a high-volume specialty nationwide, with 175,652 enrolled providers across 56 states and an average of 1,000 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

8383 NE SANDY BLVD
PORTLAND, OR 97220

Provider Details

NPI 1831278274
Specialty Registered Nurse
Credentials PMHNP
Gender Female
NPI Issued 11/05/2006

Brand vs generic prescribing mix · Typical

CATHLEEN AHERN, PMHNP — brand share 22.0%
Specialty average (est.)

22% brand-name claims vs 78% generic, on 451 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.

451
Total Claims
$46K
Total Drug Cost
14
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
618
Total Day Supply
12,858
Brand vs Generic
22% brand / 78% generic
Brand Drug Cost
$39K
Generic Drug Cost
$7K

Patient Demographics

Average Patient Age
62.5 years
Avg HCC Risk Score
0.81

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Clonazepam
64
Trintellix
Vortioxetine Hydrobromide
62
Quetiapine Fumarate
44
Clonidine Hcl
40
Trazodone Hcl
39
Aplenzin
Bupropion Hbr
32
Zolpidem Tartrate
26
Escitalopram Oxalate
15
Sertraline Hcl
11

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

Registered Nurse Overview

How CATHLEEN AHERN, PMHNP fits within the Registered Nurse landscape nationally.

175,652
Registered Nurse Providers in US
56
States with Registered Nurse
1,000
Avg Claims per Provider

CATHLEEN AHERN, PMHNP's 451 claims are below the specialty average of 1,000.

Nearby Registered Nurse Providers in Oregon

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

Compare Registered Nurse nationally: see state-by-state distribution →

Frequently Asked Questions

What is CATHLEEN AHERN, PMHNP's specialty?
CATHLEEN AHERN, PMHNP specializes in Registered Nurse and practices in PORTLAND, Oregon. Credentials: PMHNP.
How much does CATHLEEN AHERN, PMHNP prescribe under Medicare Part D?
In 2023, CATHLEEN AHERN, PMHNP wrote 451 Medicare Part D claims totaling $46K in drug costs for 14 beneficiaries.
Where is CATHLEEN AHERN, PMHNP located?
CATHLEEN AHERN, PMHNP is located at 8383 NE SANDY BLVD, PORTLAND, OR, 97220. Phone: (503) 253-0964.
What is CATHLEEN AHERN, PMHNP's NPI number?
CATHLEEN AHERN, PMHNP's National Provider Identifier (NPI) is 1831278274, issued on 11/05/2006.
Does CATHLEEN AHERN, PMHNP prescribe more brand-name or generic drugs?
CATHLEEN AHERN, PMHNP's prescribing is 22% brand-name and 78% generic drugs by claim count, with $39K in brand drug costs.
How many Registered Nurse providers are there in the US?
There are 175,652 Registered Nurse providers across 56 states in the US. The average Registered Nurse provider writes 1,000 Medicare Part D claims per year.
What drugs does CATHLEEN AHERN, PMHNP prescribe most often?
Based on 2023 Medicare Part D data, CATHLEEN AHERN, PMHNP's most frequently prescribed drugs include Clonazepam, Trintellix, Quetiapine Fumarate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CATHLEEN AHERN, PMHNP accept Medicare?
CATHLEEN AHERN, PMHNP appears in CMS Medicare data with 451 Part D claims and 14 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CATHLEEN AHERN, PMHNP's credentials?
CATHLEEN AHERN, PMHNP's NPI is 1831278274 with credentials PMHNP. 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