2026 NPPES data Gynecologic Oncology Physician NPI 1992335848 PA-C
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CHRISTINA VIERU, PA-C

Gynecologic Oncology Physician in TIGARD, 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
193
Medicare Part D claims · 93 beneficiaries · Gynecologic Oncology Physician avg: 188
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: CHRISTINA VIERU, PA-C is a Gynecologic Oncology Physician ([object Object]) practicing in TIGARD, Oregon with a Medicare Part D prescribing footprint of 193 claims across 93 beneficiaries — 6% brand-name prescribing .

What stands out: CHRISTINA VIERU, PA-C filed 193 Medicare Part D claims in 2023 across TIGARD, Oregon. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

CHRISTINA VIERU, PA-C practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

CHRISTINA VIERU, PA-C at a glance

Quality data not reported

NPI registry status

Active

Issued 01/20/2020

NPI 1992335848

Primary specialty

Gynecologic Oncology Physician

Niche

1,360 US NPIs in this specialty

Medicare Part D claims

193 3% vs specialty avg

2023 prescription claims

Specialty avg: 188

Specialty distribution in Oregon

How Gynecologic Oncology Physician compares to other specialties among Oregon providers

Oregon providers

Gynecologic Oncology Physician share within Oregon

1. Gynecologic Oncology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Gynecologic Oncology Physician share within Oregon

Specialty board-certification context

Estimated specialty board-certified rate — Gynecologic Oncology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Gynecologic Oncology Physician ABMS/AOA estimate

Est. board-certified rate (Gynecologic Oncology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Gynecologic Oncology Physician) — 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).

CHRISTINA VIERU, PA-C is a Gynecologic Oncology Physician provider practicing in TIGARD, Oregon, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1992335848. 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.

CHRISTINA VIERU, PA-C appears in the CMS NPPES registry as a Gynecologic Oncology Physician provider holding PA-C credentials at 12123 SW 69TH AVE, TIGARD, OR, 97223, with a listed phone of (971) 708-7600. NPI 1992335848 was issued on 01/20/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what VIERU 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 193 prescription claims written by this provider, covering 93 Medicare beneficiaries and totaling roughly $7K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 39.9%. 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.

Gynecologic Oncology Physician is a narrow specialty nationwide, with 1,360 enrolled providers across 49 states and an average of 188 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

12123 SW 69TH AVE
TIGARD, OR 97223

Provider Details

NPI 1992335848
Specialty Gynecologic Oncology Physician
Credentials PA-C
Gender Female
NPI Issued 01/20/2020

Hospital and facility affiliations

Facilities where CHRISTINA VIERU, PA-C 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.

NORTHWEST CANCER SPECIALISTS PC
TIGARD, 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).

Brand vs generic prescribing mix · Generic-heavy

CHRISTINA VIERU, PA-C — brand share 6.0%
Specialty average (est.)

6% brand-name claims vs 94% generic, on 193 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.

193
Total Claims
$7K
Total Drug Cost
93
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
215
Total Day Supply
3,229
Brand vs Generic
6% brand / 94% generic
Brand Drug Cost
$4K
Generic Drug Cost
$3K
Opioid Claims
77 (39.9% rate)
Antibiotic Claims
15

Patient Demographics

Average Patient Age
71.8 years
Avg HCC Risk Score
2.04
Gender Split
100% female / 0% 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
Oxycodone Hcl
59
Clobetasol Propionate
15
Ondansetron Odt
Ondansetron
11

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

Gynecologic Oncology Physician Overview

How CHRISTINA VIERU, PA-C fits within the Gynecologic Oncology Physician landscape nationally.

1,360
Gynecologic Oncology Physician Providers in US
49
States with Gynecologic Oncology Physician
188
Avg Claims per Provider

CHRISTINA VIERU, PA-C's 193 claims are above the specialty average of 188.

Nearby Gynecologic Oncology Physician Providers in Oregon

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

Compare Gynecologic Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CHRISTINA VIERU, PA-C's specialty?
CHRISTINA VIERU, PA-C specializes in Gynecologic Oncology Physician and practices in TIGARD, Oregon. Credentials: PA-C.
How much does CHRISTINA VIERU, PA-C prescribe under Medicare Part D?
In 2023, CHRISTINA VIERU, PA-C wrote 193 Medicare Part D claims totaling $7K in drug costs for 93 beneficiaries.
Where is CHRISTINA VIERU, PA-C located?
CHRISTINA VIERU, PA-C is located at 12123 SW 69TH AVE, TIGARD, OR, 97223. Phone: (971) 708-7600.
What is CHRISTINA VIERU, PA-C's NPI number?
CHRISTINA VIERU, PA-C's National Provider Identifier (NPI) is 1992335848, issued on 01/20/2020.
Does CHRISTINA VIERU, PA-C prescribe more brand-name or generic drugs?
CHRISTINA VIERU, PA-C's prescribing is 6% brand-name and 94% generic drugs by claim count, with $4K in brand drug costs.
Does CHRISTINA VIERU, PA-C prescribe opioids?
Yes, CHRISTINA VIERU, PA-C had 77 opioid claims in 2023 with an opioid prescribing rate of 39.9%.
How many Gynecologic Oncology Physician providers are there in the US?
There are 1,360 Gynecologic Oncology Physician providers across 49 states in the US. The average Gynecologic Oncology Physician provider writes 188 Medicare Part D claims per year.
What drugs does CHRISTINA VIERU, PA-C prescribe most often?
Based on 2023 Medicare Part D data, CHRISTINA VIERU, PA-C's most frequently prescribed drugs include Oxycodone Hcl, Clobetasol Propionate, Ondansetron Odt. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHRISTINA VIERU, PA-C accept Medicare?
CHRISTINA VIERU, PA-C appears in CMS Medicare data with 193 Part D claims and 93 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHRISTINA VIERU, PA-C's credentials?
CHRISTINA VIERU, PA-C's NPI is 1992335848 with credentials PA-C. 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