2026 NPPES data Dental Hygienist NPI 1487929659 RDH
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KATHRYN NGUYEN, RDH

Dental Hygienist 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
211
Medicare Part D claims · 115 beneficiaries · Dental Hygienist avg: 114

What the federal data shows

KATHRYN NGUYEN, RDH filed 211 Medicare Part D claims in 2023 as a Dental Hygienist in PORTLAND, Oregon.

211
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.

KATHRYN NGUYEN, RDH's Medicare Part D volume vs every U.S. prescriber

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

211 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 KATHRYN NGUYEN, RDH?

Quality data not reported

NPI registry status

Active

Issued 03/20/2012

NPI 1487929659

Primary specialty

Dental Hygienist

Mid-sized

15,486 US NPIs in this specialty

Medicare Part D claims

211 85% vs specialty avg

2023 prescription claims

Specialty avg: 114

Specialty distribution in Oregon

How Dental Hygienist compares to other specialties among Oregon providers

Oregon providers

Dental Hygienist share within Oregon

1. Dental Hygienist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Dental Hygienist share within Oregon

Specialty board-certification context

Estimated specialty board-certified rate — Dental Hygienist (ABMS / AOA reference)

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

Est. board-certified rate (Dental Hygienist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Dental Hygienist) — 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).

KATHRYN NGUYEN, RDH appears in the CMS NPPES registry as a Dental Hygienist provider holding RDH credentials at 3542 NE 163RD PL, PORTLAND, OR, 97230, with a listed phone of (503) 961-4068. NPI 1487929659 was issued on 03/20/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NGUYEN 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 211 prescription claims written by this provider, covering 115 Medicare beneficiaries and totaling roughly $7K 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.

Dental Hygienist is a mid-sized specialty nationwide, with 15,486 enrolled providers across 55 states and an average of 114 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

3542 NE 163RD PL
PORTLAND, OR 97230

Provider Details

NPI 1487929659
Specialty Dental Hygienist
Credentials RDH
Gender Female
NPI Issued 03/20/2012

Medicare Part D Prescribing Data

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

211
Total Claims
$7K
Total Drug Cost
115
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
483
Total Day Supply
14,490
Brand Drug Cost
$0
Generic Drug Cost
$0

Patient Demographics

Average Patient Age
73.7 years
Avg HCC Risk Score
0.95
Gender Split
55% female / 45% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Fluoridex
Fluoride (Sodium)
211

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

Dental Hygienist Overview

How KATHRYN NGUYEN, RDH fits within the Dental Hygienist landscape nationally.

15,486
Dental Hygienist Providers in US
55
States with Dental Hygienist
114
Avg Claims per Provider

KATHRYN NGUYEN, RDH's 211 claims are above the specialty average of 114.

Nearby Dental Hygienist Providers in Oregon

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

Compare Dental Hygienist nationally: see state-by-state distribution →

Frequently Asked Questions

What is KATHRYN NGUYEN, RDH's specialty?
KATHRYN NGUYEN, RDH specializes in Dental Hygienist and practices in PORTLAND, Oregon. Credentials: RDH.
How much does KATHRYN NGUYEN, RDH prescribe under Medicare Part D?
In 2023, KATHRYN NGUYEN, RDH wrote 211 Medicare Part D claims totaling $7K in drug costs for 115 beneficiaries.
Where is KATHRYN NGUYEN, RDH located?
KATHRYN NGUYEN, RDH is located at 3542 NE 163RD PL, PORTLAND, OR, 97230. Phone: (503) 961-4068.
What is KATHRYN NGUYEN, RDH's NPI number?
KATHRYN NGUYEN, RDH's National Provider Identifier (NPI) is 1487929659, issued on 03/20/2012.
How many Dental Hygienist providers are there in the US?
There are 15,486 Dental Hygienist providers across 55 states in the US. The average Dental Hygienist provider writes 114 Medicare Part D claims per year.
What drugs does KATHRYN NGUYEN, RDH prescribe most often?
Based on 2023 Medicare Part D data, KATHRYN NGUYEN, RDH's most frequently prescribed drugs include Fluoridex. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KATHRYN NGUYEN, RDH accept Medicare?
KATHRYN NGUYEN, RDH appears in CMS Medicare data with 211 Part D claims and 115 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KATHRYN NGUYEN, RDH's credentials?
KATHRYN NGUYEN, RDH's NPI is 1487929659 with credentials RDH. 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