2026 NPPES data Psychiatric/Mental Health Nurse Practitioner NPI 1558644955 APNP
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ELLEN BARKER-ANDERSON, APNP

Psychiatric/Mental Health Nurse Practitioner 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
2K
Medicare Part D claims · 114 beneficiaries · Psychiatric/Mental Health Nurse Practitioner avg: 927
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$93.63
5 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ELLEN BARKER-ANDERSON, APNP filed 1,752 Medicare Part D claims in 2023 as a Psychiatric/Mental Health Nurse Practitioner in PORTLAND, Oregon, prescribing 97% generic.

2K
Part D claims, 2023
97%
generic prescribing
$93.63
industry payments (Sunshine Act)

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.

ELLEN BARKER-ANDERSON, APNP's Medicare Part D volume vs every U.S. prescriber

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

1,752 Top 17% higher than 83% 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%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). This entry sits in this band. 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 ELLEN BARKER-ANDERSON, APNP?

Quality data not reported

NPI registry status

Active

Issued 09/21/2011

NPI 1558644955

Primary specialty

Psychiatric/Mental Health Nurse Practitioner

Mid-sized

39,953 US NPIs in this specialty

Medicare Part D claims

1,752 89% vs specialty avg

2023 prescription claims

Specialty avg: 927

Specialty distribution in Oregon

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

Oregon providers

Psychiatric/Mental Health Nurse Practitioner share within Oregon

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

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).

ELLEN BARKER-ANDERSON, APNP appears in the CMS NPPES registry as a Psychiatric/Mental Health Nurse Practitioner provider holding APNP credentials at 833 SW 11TH AVE STE 245, PORTLAND, OR, 97205, with a listed phone of (503) 442-6105. NPI 1558644955 was issued on 09/21/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BARKER-ANDERSON 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 1,752 prescription claims written by this provider, covering 114 Medicare beneficiaries and totaling roughly $120K in drug spend, split 3% brand-name and 97% 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.

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

833 SW 11TH AVE STE 245
PORTLAND, OR 97205

Provider Details

NPI 1558644955
Specialty Psychiatric/Mental Health Nurse Practitioner
Credentials APNP
Gender Female
NPI Issued 09/21/2011

Hospital and facility affiliations

Facilities where ELLEN BARKER-ANDERSON, APNP 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.

ROBERT OLSEN MD LLC
PORTLAND, OR

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 ELLEN BARKER-ANDERSON, APNP. Source: openpaymentsdata.cms.gov.

Total received

$94

Largest payer

ABBVIE INC.

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 · Generic-heavy

ELLEN BARKER-ANDERSON, APNP — brand share 3.0%
Specialty average (est.)

3% brand-name claims vs 97% generic, on 1,752 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.

1,752
Total Claims
$120K
Total Drug Cost
114
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,843
Total Day Supply
84,335
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$80K
Generic Drug Cost
$41K

Patient Demographics

Average Patient Age
64.8 years
Avg HCC Risk Score
1.34
Gender Split
72% female / 28% male
Age Distribution
<65: 35, 65-74: 57, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What ELLEN BARKER-ANDERSON, APNP 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
Quetiapine Fumarate
161
Clonazepam
137
Lamotrigine
103
Buspirone Hcl
90
Trazodone Hcl
72
Escitalopram Oxalate
71
Duloxetine Hcl
65
Mirtazapine
59
Fluoxetine Hcl
56
Gabapentin
52

* 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 ELLEN BARKER-ANDERSON, APNP 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

ELLEN BARKER-ANDERSON, APNP's 1,752 claims are above the specialty average of 927.

Nearby Psychiatric/Mental Health Nurse Practitioner Providers in Oregon

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

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

Frequently Asked Questions

What is ELLEN BARKER-ANDERSON, APNP's specialty?
ELLEN BARKER-ANDERSON, APNP specializes in Psychiatric/Mental Health Nurse Practitioner and practices in PORTLAND, Oregon. Credentials: APNP.
How much does ELLEN BARKER-ANDERSON, APNP prescribe under Medicare Part D?
In 2023, ELLEN BARKER-ANDERSON, APNP wrote 1,752 Medicare Part D claims totaling $120K in drug costs for 114 beneficiaries.
Where is ELLEN BARKER-ANDERSON, APNP located?
ELLEN BARKER-ANDERSON, APNP is located at 833 SW 11TH AVE STE 245, PORTLAND, OR, 97205. Phone: (503) 442-6105.
What is ELLEN BARKER-ANDERSON, APNP's NPI number?
ELLEN BARKER-ANDERSON, APNP's National Provider Identifier (NPI) is 1558644955, issued on 09/21/2011.
Does ELLEN BARKER-ANDERSON, APNP prescribe more brand-name or generic drugs?
ELLEN BARKER-ANDERSON, APNP's prescribing is 3% brand-name and 97% generic drugs by claim count, with $80K in brand drug costs.
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 ELLEN BARKER-ANDERSON, APNP prescribe most often?
Based on 2023 Medicare Part D data, ELLEN BARKER-ANDERSON, APNP's most frequently prescribed drugs include Quetiapine Fumarate, Clonazepam, Lamotrigine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ELLEN BARKER-ANDERSON, APNP accept Medicare?
ELLEN BARKER-ANDERSON, APNP appears in CMS Medicare data with 1,752 Part D claims and 114 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ELLEN BARKER-ANDERSON, APNP's credentials?
ELLEN BARKER-ANDERSON, APNP's NPI is 1558644955 with credentials APNP. 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