2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1134180839 M.D.
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LEONARDO GAN-LIM, M.D.

Geriatric Medicine (Internal Medicine) Physician in LAS VEGAS, Nevada. 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
6K
Medicare Part D claims · 570 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.4K
40 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: LEONARDO GAN-LIM, M.D. is a Geriatric Medicine (Internal Medicine) Physician ([object Object]) practicing in LAS VEGAS, Nevada with a Medicare Part D prescribing footprint of 6K claims across 570 beneficiaries — 15% brand-name prescribing . Industry payments of $1.4K across 40 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: LEONARDO GAN-LIM, M.D. filed 6,198 Medicare Part D claims in 2023 across LAS VEGAS, Nevada. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

LEONARDO GAN-LIM, M.D. 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).

LEONARDO GAN-LIM, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 03/31/2006

NPI 1134180839

Primary specialty

Geriatric Medicine (Internal Medicine) Physician

Niche

4,161 US NPIs in this specialty

Medicare Part D claims

6,198 39% vs specialty avg

2023 prescription claims

Specialty avg: 4,450

Specialty distribution in Nevada

How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Nevada providers

Nevada providers

Geriatric Medicine (Internal Medicine) Physician share within Nevada

1. Geriatric Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Internal Medicine) Physician share within Nevada

Specialty board-certification context

Estimated specialty board-certified rate — Geriatric Medicine (Internal Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Geriatric Medicine (Internal Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Geriatric Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Geriatric Medicine (Internal Medicine) 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).

LEONARDO GAN-LIM, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider practicing in LAS VEGAS, Nevada, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1134180839. 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.

LEONARDO GAN-LIM, M.D. appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding M.D. credentials at 653 N TOWN CENTER DR STE 101, LAS VEGAS, NV, 89144, with a listed phone of (702) 805-2435. NPI 1134180839 was issued on 03/31/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GAN-LIM 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 6,198 prescription claims written by this provider, covering 570 Medicare beneficiaries and totaling roughly $999K in drug spend, split 15% brand-name and 85% generic by claim count, with an opioid prescribing rate of 1.2%. 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.

Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 enrolled providers across 52 states and an average of 4,450 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

653 N TOWN CENTER DR STE 101
LAS VEGAS, NV 89144

Provider Details

NPI 1134180839
Specialty Geriatric Medicine (Internal Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 03/31/2006

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 LEONARDO GAN-LIM, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.4K

Largest payer

Lilly USA, 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.

Brand vs generic prescribing mix · Typical

LEONARDO GAN-LIM, M.D. — brand share 15.0%
Specialty average (est.)

15% brand-name claims vs 85% generic, on 6,198 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.

6,198
Total Claims
$999K
Total Drug Cost
570
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
14,466
Total Day Supply
425,724
Brand vs Generic
15% brand / 85% generic
Brand Drug Cost
$876K
Generic Drug Cost
$121K
Opioid Claims
77 (1.2% rate)
Antibiotic Claims
152

Patient Demographics

Average Patient Age
77.2 years
Avg HCC Risk Score
1.46
Gender Split
58% female / 42% male
Age Distribution
<65: 16, 65-74: 214, 75-84: 224, 85+: 116

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
392
Levothyroxine Sodium
300
Amlodipine Besylate
273
Metformin Hcl
262
Allopurinol
209
Losartan Potassium
186
Lisinopril
149
Montelukast Sodium
141
Jardiance
Empagliflozin
124
Pravastatin Sodium
105

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

Geriatric Medicine (Internal Medicine) Physician Overview

How LEONARDO GAN-LIM, M.D. fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.

4,161
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider

LEONARDO GAN-LIM, M.D.'s 6,198 claims are above the specialty average of 4,450.

Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Nevada

Other clinicians with the same primary specialty enrolled in Nevada, drawn from the same CMS NPPES roster as GAN-LIM.

Compare Geriatric Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is LEONARDO GAN-LIM, M.D.'s specialty?
LEONARDO GAN-LIM, M.D. specializes in Geriatric Medicine (Internal Medicine) Physician and practices in LAS VEGAS, Nevada. Credentials: M.D..
How much does LEONARDO GAN-LIM, M.D. prescribe under Medicare Part D?
In 2023, LEONARDO GAN-LIM, M.D. wrote 6,198 Medicare Part D claims totaling $999K in drug costs for 570 beneficiaries.
Where is LEONARDO GAN-LIM, M.D. located?
LEONARDO GAN-LIM, M.D. is located at 653 N TOWN CENTER DR STE 101, LAS VEGAS, NV, 89144. Phone: (702) 805-2435.
What is LEONARDO GAN-LIM, M.D.'s NPI number?
LEONARDO GAN-LIM, M.D.'s National Provider Identifier (NPI) is 1134180839, issued on 03/31/2006.
Does LEONARDO GAN-LIM, M.D. prescribe more brand-name or generic drugs?
LEONARDO GAN-LIM, M.D.'s prescribing is 15% brand-name and 85% generic drugs by claim count, with $876K in brand drug costs.
Does LEONARDO GAN-LIM, M.D. prescribe opioids?
Yes, LEONARDO GAN-LIM, M.D. had 77 opioid claims in 2023 with an opioid prescribing rate of 1.2%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US?
There are 4,161 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does LEONARDO GAN-LIM, M.D. prescribe most often?
Based on 2023 Medicare Part D data, LEONARDO GAN-LIM, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LEONARDO GAN-LIM, M.D. accept Medicare?
LEONARDO GAN-LIM, M.D. appears in CMS Medicare data with 6,198 Part D claims and 570 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LEONARDO GAN-LIM, M.D.'s credentials?
LEONARDO GAN-LIM, M.D.'s NPI is 1134180839 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