NPI registry status
Active
2026 NPPES data Pulmonary Disease Physician NPI 1356337331 MD
Verify on CMS → Phan Nguyen, MD
Pulmonary Disease Physician in Arlington, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,647 in Pulmonary Disease 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
5K
Medicare Part D claims · 882 beneficiaries · Pulmonary Disease Physician avg: 1K
Generic prescribing
48%
generic claims · 52% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
10.8/100
▼ 73 pts below national avg 83.5 · Penalty band
Industry payments
$716.66
36 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Phan Nguyen, MD reported a CMS MIPS final score of 10.8/100 - below the 83.5 national average - and filed 5,323 Medicare Part D claims in 2024.
- 10.8/100
- MIPS score · -73 vs avg
- 5K
- Part D claims, 2024
- 48%
- generic prescribing
- Likely
- board-certified (heuristic)
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 Phan Nguyen, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1356337331), first enumerated 09/23/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 5,323 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 10.8/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- 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
Industry payment transparency
$716.66 in reported industry payments (36 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Texas statewide board action statistics are published annually — these figures describe aggregate state activity, not Phan Nguyen, MD's individual license status. Verify directly with the state medical board.
Source: TMB 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.
Compare Nguyen with other Pulmonary Disease Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Texas
- Dr. Qammar Abbas, M.D. Wylie, TX
- Dr. Mohamed Abdalla, MD San Antonio, TX
- Dr. Emran Abu Atherah, M.D Webster, TX
- Dr. Muhanned Abu-Hijleh, M.D. Texarkana, TX
- Dr. Bruce Ackerman, D.O. Garland, TX
- Dr. Mari Adachi, MD Plano, TX
Other specialties in Arlington: Counselor (261) · Student in an Organized Health Care Education/Training Program (249) · Pharmacist (238) · Behavior Technician (221)
CMS NPPES provider registry desk
NPI 1356337331 · Pulmonary Disease Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-LOW · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1356337331
- ENUM-LEGACY 2005
- TAX-MID 10K Pulmonary Disease
- MIPS-LOW 10.8/100
- RX-MID 5,323
- BOOK-LIGHT 600 in Texas
- PHOTO-FINISH Mitchell Lee, MD · ±0.1
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Mitchell Lee, MD…
Mitchell Lee, MD
10.7 MIPS pts
- Nguyen · this pr…
Nguyen · this provider
10.8 MIPS pts
- Roy Artal, M.D. …
Roy Artal, M.D.
11 MIPS pts
- David Young, DO …
David Young, DO
11.1 MIPS pts
- Grigory Horonenk…
Grigory Horonenko, DO
11.3 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Phan Nguyen, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
11 ≥ 2nd percentile 2% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Phan Nguyen, MD sits
This provider among pulmonary disease physician peers
Across the 2,467 pulmonary disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Phan Nguyen, MD writes more Part D claims than 95% of them and scores higher on MIPS quality than 1% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one pulmonary disease physician peer from a representative sample of 60; the gold marker is Phan Nguyen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Phan Nguyen, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Phan Nguyen, MD?
Below national averagePrimary specialty
Pulmonary Disease Physician
Medicare Part D claims
5,323 255% vs specialty avg
MIPS final score
10.8/100 72.7 pts vs avg
Specialty distribution in Texas
How Pulmonary Disease Physician compares to other specialties among Texas providers
Medicare quality performance, MIPS
Phan Nguyen, MD's 2023 MIPS final score plotted against the Pulmonary Disease Physician national average
- MIPS Final Score
- 10.8/100
- vs 83.5 national avg · 2023 performance year
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 | 1356337331 |
|---|---|
| Specialty | Pulmonary Disease Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/23/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
10.8057
Final Score
Measured-score avg: 83.5
0
Quality
36.019
Cost
Reporting: Individual
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 Phan Nguyen, MD. Source: openpaymentsdata.cms.gov.
Total received
$717
Largest payer
GlaxoSmithKline, LLC.
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.
License & disciplinary context - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Phan Nguyen, MD. To verify Phan Nguyen, MD's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Phan Nguyen, MD - brand share 52.0%
Pulmonary Disease Physician average
52% brand-name claims vs 48% generic, on 5,323 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.
5,323
Total Claims
$1.2M
Total Drug Cost
882
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,596.033
- Total Day Supply
- 184,894
- Brand vs Generic
- 52% brand / 48% generic
- Brand Drug Cost
- $1.1M
- Generic Drug Cost
- $60K
- Antibiotic Claims
- 137
Patient Demographics
- Average Patient Age
- 74.4 years
- Avg HCC Risk Score
- 2.14
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 60, 65-74: 392, 75-84: 339, 85+: 91
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Phan Nguyen, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Albuterol Sulfate …
Albuterol Sulfate Hfa
2,276 claims
- Trelegy Ellipta 671
Trelegy Ellipta
671 claims
- Prednisone 428
Prednisone
428 claims
- Breo Ellipta 231
Breo Ellipta
231 claims
- Breztri Aerosphere 186
Breztri Aerosphere
186 claims
- Fluticasone-Salmet… 170
Fluticasone-Salmeterol
170 claims
- Symbicort 147
Symbicort
147 claims
- Wixela Inhub 127
Wixela Inhub
127 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 2,276 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 671 |
| Prednisone | 428 |
| Breo Ellipta Fluticasone/Vilanterol | 231 |
| Breztri Aerosphere Budesonide/Glycopyr/Formoterol | 186 |
| Fluticasone-Salmeterol Fluticasone Propion/Salmeterol | 170 |
| Symbicort Budesonide/Formoterol Fumarate | 147 |
| Wixela Inhub Fluticasone Propion/Salmeterol | 127 |
| Ventolin Hfa Albuterol Sulfate | 118 |
| Montelukast Sodium | 99 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pulmonary Disease Physician Overview
How Phan Nguyen, MD fits within the Pulmonary Disease Physician landscape nationally.
9,647
Pulmonary Disease Physician Providers in US
53
States with Pulmonary Disease Physician
1,498
Avg Claims per Provider
Phan Nguyen, MD's 5,323 claims are above the specialty average of 1,498.
Nationwide Pulmonary Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Nguyen, both outside Texas so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (10.8 here).
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Pulmonary Disease Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Nguyen.
One of 600 Pulmonary Disease Physician providers enrolled in Texas, 11 are shown on this page.
Dr. Roberto Adachi
M.D.
Houston, TX
Dr. Robin Adams
M.D.
Victoria, TX
Dr. Anurag Agrawal
MD
Houston, TX
Imtiaz Ahmed
MD MCPS FACP FCCP
Webster, TX
Dr. Murtuza Ahmed
MD
Houston, TX
Compare Pulmonary Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Phan Nguyen, MD's specialty? ▼
Phan Nguyen, MD specializes in Pulmonary Disease Physician and practices in Arlington, Texas. Credentials: MD.
How much does Phan Nguyen, MD prescribe under Medicare Part D? ▼
In 2024, Phan Nguyen, MD wrote 5,323 Medicare Part D claims totaling $1.2M in drug costs for 882 beneficiaries.
What is Phan Nguyen, MD's Medicare quality score? ▼
Phan Nguyen, MD has a CMS MIPS Final Score of 10.8/100 (Quality: 0, Cost: 36). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Phan Nguyen, MD located? ▼
Phan Nguyen, MD is located at 601 OMEGA DR STE 208, Arlington, TX, 76014. Phone: (682) 323-7006.
What is Phan Nguyen, MD's NPI number? ▼
Phan Nguyen, MD's National Provider Identifier (NPI) is 1356337331, issued on 09/23/2005.
Does Phan Nguyen, MD prescribe more brand-name or generic drugs? ▼
Phan Nguyen, MD's prescribing is 52% brand-name and 48% generic drugs by claim count, with $1.1M in brand drug costs.
How many Pulmonary Disease Physician providers are there in the US? ▼
There are 9,647 Pulmonary Disease Physician providers across 53 states in the US. The average Pulmonary Disease Physician provider writes 1,498 Medicare Part D claims per year.
What drugs does Phan Nguyen, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Phan Nguyen, MD's most frequently prescribed drugs include Albuterol Sulfate Hfa, Trelegy Ellipta, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Phan Nguyen, MD accept Medicare? ▼
Phan Nguyen, MD appears in CMS Medicare data with 5,323 Part D claims and 882 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Phan Nguyen, MD's credentials? ▼
Phan Nguyen, MD's NPI is 1356337331 with credentials MD. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.