NPI registry status
Active
2026 NPPES data Allergy Physician NPI 1326196734 MD
Verify on CMS → Phung Nguyen, MD
Allergy Physician in Houston, 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 1,019 in Allergy 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
337
Medicare Part D claims · 46 beneficiaries · Allergy Physician avg: 755
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Phung Nguyen, MD filed 337 Medicare Part D claims in 2023 as a Allergy Physician in Houston, Texas.
- 337
- 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.
Phung Nguyen, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
337 Top 43% higher than 57% of 1,370,886 prescribers
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
◑
Board-eligible specialty (heuristic, not verified)
Phung Nguyen, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Phung Nguyen, MD?
Quality data not reportedPrimary specialty
Allergy Physician
Medicare Part D claims
337 55% vs specialty avg
Specialty distribution in Texas
How Allergy Physician compares to other specialties among Texas 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 Allergy 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).
Phung Nguyen, MD appears in the CMS NPPES registry as a Allergy Physician provider holding MD credentials at 2905 MILAM ST, Houston, TX, 77006, with a listed phone of (713) 529-5659. NPI 1326196734 was issued on 01/08/2007.
Medicare Part D records for calendar year 2023 show 337 prescription claims written by this provider, covering 46 Medicare beneficiaries and totaling roughly $10K in drug spend.
Allergy Physician is a narrow specialty nationwide, with 1,019 enrolled providers across 49 states and an average of 755 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
Provider Details
| NPI | 1326196734 |
|---|---|
| Specialty | Allergy Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 01/08/2007 |
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 Phung Nguyen, MD. To verify Phung 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
337
Total Claims
$10K
Total Drug Cost
46
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 474
- Total Day Supply
- 12,475
- Generic Drug Cost
- $8K
- Antibiotic Claims
- 66
Patient Demographics
- Average Patient Age
- 75.6 years
- Avg HCC Risk Score
- 0.91
- Gender Split
- 57% female / 43% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Phung Nguyen, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Celecoxib
Celecoxib
36 claims
- Amlodipine Besylate
Amlodipine Besylate
27 claims
- Azithromycin
Azithromycin
25 claims
- Clobetasol Propion…
Clobetasol Propionate
15 claims
- Hydroxyzine Hcl 14
Hydroxyzine Hcl
14 claims
- Amoxicillin-Clavul… 13
Amoxicillin-Clavulanate Potass
13 claims
- Montelukast Sodium 13
Montelukast Sodium
13 claims
- Levofloxacin 12
Levofloxacin
12 claims
| Drug | Claims |
|---|---|
| Celecoxib | 36 |
| Amlodipine Besylate | 27 |
| Azithromycin | 25 |
| Clobetasol Propionate | 15 |
| Hydroxyzine Hcl | 14 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 13 |
| Montelukast Sodium | 13 |
| Levofloxacin | 12 |
| Alendronate Sodium | 11 |
| Carvedilol | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy Physician Overview
How Phung Nguyen, MD fits within the Allergy Physician landscape nationally.
1,019
Allergy Physician Providers in US
49
States with Allergy Physician
755
Avg Claims per Provider
Phung Nguyen, MD's 337 claims are below the specialty average of 755.
Nearby Allergy Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Nguyen.
Dr. Stuart Abramson
M.D.
San Angelo, TX
Dr. Sasha Alvarado
D.O.
Murphy, TX
Dr. Sheila Amar
M.D.
Georgetown, TX
Dr. Aneesh Angirekula
MD
Houston, TX
Dr. Pedro Avila
MD
Spring, TX
Compare Allergy Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Texas
Frequently Asked Questions
What is Phung Nguyen, MD's specialty? ▼
Phung Nguyen, MD specializes in Allergy Physician and practices in Houston, Texas. Credentials: MD.
How much does Phung Nguyen, MD prescribe under Medicare Part D? ▼
In 2023, Phung Nguyen, MD wrote 337 Medicare Part D claims totaling $10K in drug costs for 46 beneficiaries.
Where is Phung Nguyen, MD located? ▼
Phung Nguyen, MD is located at 2905 MILAM ST, Houston, TX, 77006. Phone: (713) 529-5659.
What is Phung Nguyen, MD's NPI number? ▼
Phung Nguyen, MD's National Provider Identifier (NPI) is 1326196734, issued on 01/08/2007.
How many Allergy Physician providers are there in the US? ▼
There are 1,019 Allergy Physician providers across 49 states in the US. The average Allergy Physician provider writes 755 Medicare Part D claims per year.
What drugs does Phung Nguyen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Phung Nguyen, MD's most frequently prescribed drugs include Celecoxib, Amlodipine Besylate, Azithromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Phung Nguyen, MD accept Medicare? ▼
Phung Nguyen, MD appears in CMS Medicare data with 337 Part D claims and 46 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Phung Nguyen, MD's credentials? ▼
Phung Nguyen, MD's NPI is 1326196734 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 (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
Compiled from official public sources by the PlainDoctor editorial team.