NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1932519097 DO
Verify on CMS → Andrew Nguyen, DO
Gastroenterology Physician in Seattle, Washington.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 17,061 in Gastroenterology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
300
Medicare Part D claims · 71 beneficiaries · Gastroenterology Physician avg: 848
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Andrew Nguyen, DO filed 300 Medicare Part D claims in 2024 as a Gastroenterology Physician in Seattle, Washington, prescribing 93% generic.
- 300
- Part D claims, 2024
- 93%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥56th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Andrew Nguyen, DO
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1932519097), first enumerated 04/29/2014.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 300 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Washington statewide board action statistics are published annually — these figures describe aggregate state activity, not Andrew Nguyen, DO's individual license status. Verify directly with the state medical board.
Source: WMC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1932519097 · Gastroenterology Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1932519097
- ENUM-MID 2014
- TAX-MID 17K Gastroenterology Physician
- RX-LIGHT 300
- BOOK-THIN 448 in Washington
- PHOTO-ENUM Angelica Nocerino · 2014
Andrew Nguyen, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
300 ≥ 56th percentile 56% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Andrew Nguyen, DO 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).
What does the federal data show about Andrew Nguyen, DO?
Quality data not reportedPrimary specialty
Gastroenterology Physician
Medicare Part D claims
300 65% vs specialty avg
Specialty distribution in Washington
How Gastroenterology Physician compares to other specialties among Washington providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Gastroenterology Physician. Verify directly:
How MIPS and board certification work
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).
Practice Address
Provider Details
| NPI | 1932519097 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 04/29/2014 |
Hospital and facility affiliations
Facilities where Andrew Nguyen, DO 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.
Kaiser Foundation Health Plan OF Washington
Seattle, WA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Washington WMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~34K Washington medical licensees in 2023 - they are NOT specific to Andrew Nguyen, DO. To verify Andrew Nguyen, DO's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Andrew Nguyen, DO - brand share 7.0%
Gastroenterology Physician average
7% brand-name claims vs 93% generic, on 300 2024 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 2024.
300
Total Claims
$97K
Total Drug Cost
71
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 493.367
- Total Day Supply
- 13,584
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $82K
- Generic Drug Cost
- $15K
- Antibiotic Claims
- 14
Patient Demographics
- Average Patient Age
- 70.9 years
- Avg HCC Risk Score
- 1.57
- Gender Split
- 56% female / 44% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Andrew Nguyen, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Pantoprazole Sodium
Pantoprazole Sodium
33 claims
- Spironolactone
Spironolactone
31 claims
- Furosemide
Furosemide
27 claims
- Gavilyte-C
Gavilyte-C
27 claims
- Famotidine
Famotidine
17 claims
- Carvedilol
Carvedilol
16 claims
- Lactulose
Lactulose
16 claims
- Prednisone 13
Prednisone
13 claims
| Drug | Claims |
|---|---|
| Pantoprazole Sodium | 33 |
| Spironolactone | 31 |
| Furosemide | 27 |
| Gavilyte-C Peg3350/Sod Sulf,bicarb,cl/Kcl | 27 |
| Famotidine | 17 |
| Carvedilol | 16 |
| Lactulose | 16 |
| Prednisone | 13 |
| Xifaxan Rifaximin | 13 |
| Mycophenolate Mofetil | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Andrew Nguyen, DO fits within the Gastroenterology Physician landscape nationally.
17,061
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
848
Avg Claims per Provider
Andrew Nguyen, DO's 300 claims are below the specialty average of 848.
Nationwide Gastroenterology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Nguyen, both outside Washington so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Gastroenterology Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Nguyen.
One of 448 Gastroenterology Physician providers enrolled in Washington, 5 are shown here.
Abimbola Adike
Poulsbo, WA
Dr. Abhishek Agarwal
MD
Puyallup, WA
Dr. Gaurav Aggarwal
M.D.
Bellevue, WA
Dr. Sanjay Agrawal
M.D.
Tacoma, WA
Dr. Ehsaan Akhtar
MD
Kirkland, WA
Compare Gastroenterology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Andrew Nguyen, DO's specialty? ▼
Andrew Nguyen, DO specializes in Gastroenterology Physician and practices in Seattle, Washington. Credentials: DO.
How much does Andrew Nguyen, DO prescribe under Medicare Part D? ▼
In 2024, Andrew Nguyen, DO wrote 300 Medicare Part D claims totaling $97K in drug costs for 71 beneficiaries.
Where is Andrew Nguyen, DO located? ▼
Andrew Nguyen, DO is located at 125 16TH AVE E, Seattle, WA, 98112. Phone: (206) 326-3000.
What is Andrew Nguyen, DO's NPI number? ▼
Andrew Nguyen, DO's National Provider Identifier (NPI) is 1932519097, issued on 04/29/2014.
Does Andrew Nguyen, DO prescribe more brand-name or generic drugs? ▼
Andrew Nguyen, DO's prescribing is 7% brand-name and 93% generic drugs by claim count, with $82K in brand drug costs.
How many Gastroenterology Physician providers are there in the US? ▼
There are 17,061 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 848 Medicare Part D claims per year.
What drugs does Andrew Nguyen, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Andrew Nguyen, DO's most frequently prescribed drugs include Pantoprazole Sodium, Spironolactone, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Andrew Nguyen, DO accept Medicare? ▼
Andrew Nguyen, DO appears in CMS Medicare data with 300 Part D claims and 71 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Andrew Nguyen, DO's credentials? ▼
Andrew Nguyen, DO's NPI is 1932519097 with credentials DO. 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
View source datasets and methodology notes
- 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 (2024). 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.