2026 NPPES data Internal Medicine Physician NPI 1124067103 M.D.
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Lam Nguyen, M.D.

Internal Medicine Physician in Honolulu, Hawaii. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 in Internal Medicine 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
318
Medicare Part D claims · 92 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Lam Nguyen, M.D. filed 318 Medicare Part D claims in 2023 as a Internal Medicine Physician in Honolulu, Hawaii, prescribing 89% generic.

318
Part D claims, 2023
89%
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.

Lam Nguyen, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

318 Top 43% higher than 57% 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. 2K+: 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

Board certification likely (heuristic, not verified)

Lam Nguyen, M.D. 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 Lam Nguyen, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/06/2006

NPI 1124067103

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

318 88% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Hawaii

How Internal Medicine Physician compares to other specialties among Hawaii providers

Hawaii providers
Behavior Technician - 16.4%Behavior Technician16.4%Massage Therapist - 4.3%Massage Therapist4.3%Physical Therapist - 3.7%Physical Therapist3.7%Pharmacist - 3.7%Pharmacist3.7%Mental Health Counselor - 3.1%Mental Health Counselor3.1%Internal Medicine Physician - 3.1%Internal Medicine Physician3.1%
Largest specialties in Hawaii (% of in-state 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 Internal Medicine Physician. Verify directly:

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).

Lam Nguyen, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 1301 PUNCHBOWL ST, Honolulu, HI, 96813, with a listed phone of (808) 538-9011. NPI 1124067103 was issued on 06/06/2006. 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 318 prescription claims written by this provider, covering 92 Medicare beneficiaries and totaling roughly $20K in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 14.5%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

1301 PUNCHBOWL ST
Honolulu, HI 96813

Provider Details

NPI 1124067103
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 06/06/2006

Hospital and facility affiliations

Facilities where Lam Nguyen, M.D. 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.

Queens University Medical Group
Honolulu, HI

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 · Typical

Lam Nguyen, M.D. - brand share 11.0%
Internal Medicine Physician average

11% brand-name claims vs 89% generic, on 318 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.

318
Total Claims
$20K
Total Drug Cost
92
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
424
Total Day Supply
10,569
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$12K
Generic Drug Cost
$7K
Opioid Claims
46 (14.5% rate)
Antibiotic Claims
16

Patient Demographics

Average Patient Age
81.1 years
Avg HCC Risk Score
3.13
Gender Split
62% female / 38% male

Top Prescribed Drugs (Medicare Part D)

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

What Lam Nguyen, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Fentanyl
24
Prednisone
20
Gabapentin
15
Atorvastatin Calcium
14
Oxycodone Hcl
13
Pregabalin
13
Aripiprazole
12

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

Internal Medicine Physician Overview

How Lam Nguyen, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

Lam Nguyen, M.D.'s 318 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Hawaii

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

Compare Internal Medicine 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 Hawaii medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Internal Medicine 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.

Frequently Asked Questions

What is Lam Nguyen, M.D.'s specialty?
Lam Nguyen, M.D. specializes in Internal Medicine Physician and practices in Honolulu, Hawaii. Credentials: M.D..
How much does Lam Nguyen, M.D. prescribe under Medicare Part D?
In 2023, Lam Nguyen, M.D. wrote 318 Medicare Part D claims totaling $20K in drug costs for 92 beneficiaries.
Where is Lam Nguyen, M.D. located?
Lam Nguyen, M.D. is located at 1301 PUNCHBOWL ST, Honolulu, HI, 96813. Phone: (808) 538-9011.
What is Lam Nguyen, M.D.'s NPI number?
Lam Nguyen, M.D.'s National Provider Identifier (NPI) is 1124067103, issued on 06/06/2006.
Does Lam Nguyen, M.D. prescribe more brand-name or generic drugs?
Lam Nguyen, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $12K in brand drug costs.
Does Lam Nguyen, M.D. prescribe opioids?
Yes, Lam Nguyen, M.D. had 46 opioid claims in 2023 with an opioid prescribing rate of 14.5%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Lam Nguyen, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Lam Nguyen, M.D.'s most frequently prescribed drugs include Fentanyl, Prednisone, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Lam Nguyen, M.D. accept Medicare?
Lam Nguyen, M.D. appears in CMS Medicare data with 318 Part D claims and 92 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Lam Nguyen, M.D.'s credentials?
Lam Nguyen, M.D.'s NPI is 1124067103 with credentials M.D.. 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

Compiled from official public sources by the PlainDoctor editorial team.