2026 NPPES data Acute Care Nurse Practitioner NPI 1447865464 DNP
Verify on CMS →

ANNABEL WALKER, DNP

Acute Care Nurse Practitioner in MEDFORD, 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
628
Medicare Part D claims · 287 beneficiaries · Acute Care Nurse Practitioner avg: 576
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$334.37
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ANNABEL WALKER, DNP filed 628 Medicare Part D claims in 2023 as a Acute Care Nurse Practitioner in MEDFORD, Oregon, prescribing 97% generic.

628
Part D claims, 2023
97%
generic prescribing
$334.37
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.

ANNABEL WALKER, DNP's Medicare Part D volume vs every U.S. prescriber

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

628 Top 31% higher than 69% 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%). This entry sits in this band. 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 ANNABEL WALKER, DNP?

Quality data not reported

NPI registry status

Active

Issued 09/15/2020

NPI 1447865464

Primary specialty

Acute Care Nurse Practitioner

Mid-sized

24,583 US NPIs in this specialty

Medicare Part D claims

628 9% vs specialty avg

2023 prescription claims

Specialty avg: 576

Specialty distribution in Oregon

How Acute Care Nurse Practitioner compares to other specialties among Oregon providers

Oregon providers

Acute Care Nurse Practitioner share within Oregon

1. Acute Care Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Acute Care Nurse Practitioner share within Oregon

Specialty board-certification context

Estimated specialty board-certified rate — Acute Care Nurse Practitioner (ABMS / AOA reference)

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

Est. board-certified rate (Acute Care Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Acute Care 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).

ANNABEL WALKER, DNP appears in the CMS NPPES registry as a Acute Care Nurse Practitioner provider holding DNP credentials at 1111 CRATER LAKE AVE, MEDFORD, OR, 97504, with a listed phone of (541) 732-5545. NPI 1447865464 was issued on 09/15/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WALKER 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 628 prescription claims written by this provider, covering 287 Medicare beneficiaries and totaling roughly $27K in drug spend, split 3% brand-name and 97% generic by claim count, with an opioid prescribing rate of 26.3%. 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.

Acute Care Nurse Practitioner is a mid-sized specialty nationwide, with 24,583 enrolled providers across 53 states and an average of 576 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

1111 CRATER LAKE AVE
MEDFORD, OR 97504

Provider Details

NPI 1447865464
Specialty Acute Care Nurse Practitioner
Credentials DNP
Gender Female
NPI Issued 09/15/2020

Hospital and facility affiliations

Facilities where ANNABEL WALKER, DNP 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.

PAIN RELIEF INSTITUTE LLC
MEDFORD, OR
PROVIDENCE HEALTH AND SERVICES OREGON
MEDFORD, 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 ANNABEL WALKER, DNP. Source: openpaymentsdata.cms.gov.

Total received

$334

Largest payer

Solventum Corporation

Most common payment type

Travel and Lodging

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

ANNABEL WALKER, DNP — brand share 3.0%
Specialty average (est.)

3% brand-name claims vs 97% generic, on 628 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.

628
Total Claims
$27K
Total Drug Cost
287
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
640
Total Day Supply
6,700
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$8K
Generic Drug Cost
$19K
Opioid Claims
165 (26.3% rate)
Antibiotic Claims
80

Patient Demographics

Average Patient Age
72.1 years
Avg HCC Risk Score
1.20
Gender Split
55% female / 45% male
Age Distribution
<65: 35, 65-74: 152, 75-84: 82, 85+: 18

Top Prescribed Drugs (Medicare Part D)

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

What ANNABEL WALKER, DNP 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
Naloxone Hcl
172
Oxycodone Hcl
93
Cefadroxil
55
Ondansetron Odt
Ondansetron
54
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
43
Methocarbamol
38
Omeprazole
25
Tramadol Hcl
16
Amlodipine Besylate
14
Meloxicam
13

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

Acute Care Nurse Practitioner Overview

How ANNABEL WALKER, DNP fits within the Acute Care Nurse Practitioner landscape nationally.

24,583
Acute Care Nurse Practitioner Providers in US
53
States with Acute Care Nurse Practitioner
576
Avg Claims per Provider

ANNABEL WALKER, DNP's 628 claims are above the specialty average of 576.

Nearby Acute Care Nurse Practitioner Providers in Oregon

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

Compare Acute Care Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is ANNABEL WALKER, DNP's specialty?
ANNABEL WALKER, DNP specializes in Acute Care Nurse Practitioner and practices in MEDFORD, Oregon. Credentials: DNP.
How much does ANNABEL WALKER, DNP prescribe under Medicare Part D?
In 2023, ANNABEL WALKER, DNP wrote 628 Medicare Part D claims totaling $27K in drug costs for 287 beneficiaries.
Where is ANNABEL WALKER, DNP located?
ANNABEL WALKER, DNP is located at 1111 CRATER LAKE AVE, MEDFORD, OR, 97504. Phone: (541) 732-5545.
What is ANNABEL WALKER, DNP's NPI number?
ANNABEL WALKER, DNP's National Provider Identifier (NPI) is 1447865464, issued on 09/15/2020.
Does ANNABEL WALKER, DNP prescribe more brand-name or generic drugs?
ANNABEL WALKER, DNP's prescribing is 3% brand-name and 97% generic drugs by claim count, with $8K in brand drug costs.
Does ANNABEL WALKER, DNP prescribe opioids?
Yes, ANNABEL WALKER, DNP had 165 opioid claims in 2023 with an opioid prescribing rate of 26.3%.
How many Acute Care Nurse Practitioner providers are there in the US?
There are 24,583 Acute Care Nurse Practitioner providers across 53 states in the US. The average Acute Care Nurse Practitioner provider writes 576 Medicare Part D claims per year.
What drugs does ANNABEL WALKER, DNP prescribe most often?
Based on 2023 Medicare Part D data, ANNABEL WALKER, DNP's most frequently prescribed drugs include Naloxone Hcl, Oxycodone Hcl, Cefadroxil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ANNABEL WALKER, DNP accept Medicare?
ANNABEL WALKER, DNP appears in CMS Medicare data with 628 Part D claims and 287 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ANNABEL WALKER, DNP's credentials?
ANNABEL WALKER, DNP's NPI is 1447865464 with credentials DNP. 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