2026 NPPES data Internal Medicine Physician NPI 1821013798 M.D.
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ANTONIO ALAMO, M.D.

Internal Medicine Physician in HENDERSON, 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
217
Medicare Part D claims · 26 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$358.04
2 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: ANTONIO ALAMO, M.D. is a Internal Medicine Physician ([object Object]) practicing in HENDERSON, Nevada with a Medicare Part D prescribing footprint of 217 claims across 26 beneficiaries — 11% brand-name prescribing . Industry payments of $358.04 across 2 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: ANTONIO ALAMO, M.D. filed 217 Medicare Part D claims in 2023 across HENDERSON, Nevada. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

ANTONIO ALAMO, 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).

ANTONIO ALAMO, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 07/13/2006

NPI 1821013798

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

217 92% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Nevada

How Internal Medicine Physician compares to other specialties among Nevada providers

Nevada providers

Internal Medicine Physician share within Nevada

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

Specialty board-certification context

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

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

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

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

ANTONIO ALAMO, M.D. is a Internal Medicine Physician provider practicing in HENDERSON, Nevada, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1821013798. 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.

ANTONIO ALAMO, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 56 N PECOS RD STE A, HENDERSON, NV, 89074, with a listed phone of (702) 456-4011. NPI 1821013798 was issued on 07/13/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ALAMO 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 217 prescription claims written by this provider, covering 26 Medicare beneficiaries and totaling roughly $12K in drug spend, split 11% brand-name and 89% generic by claim count. 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

56 N PECOS RD STE A
HENDERSON, NV 89074

Provider Details

NPI 1821013798
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 07/13/2006

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 ANTONIO ALAMO, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$358

Largest payer

ShockWave Medical, Inc

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

ANTONIO ALAMO, M.D. — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 217 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.

217
Total Claims
$12K
Total Drug Cost
26
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
616
Total Day Supply
18,147
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$7K
Generic Drug Cost
$4K

Patient Demographics

Average Patient Age
77.0 years
Avg HCC Risk Score
0.95
Gender Split
50% female / 50% male
Age Distribution
<65: 0, 65-74: 12, 75-84: N/A, 85+: N/A

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
29
Amlodipine Besylate
23
Levothyroxine Sodium
23
Losartan Potassium
22

* 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 ANTONIO ALAMO, 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

ANTONIO ALAMO, M.D.'s 217 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Nevada

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

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

Frequently Asked Questions

What is ANTONIO ALAMO, M.D.'s specialty?
ANTONIO ALAMO, M.D. specializes in Internal Medicine Physician and practices in HENDERSON, Nevada. Credentials: M.D..
How much does ANTONIO ALAMO, M.D. prescribe under Medicare Part D?
In 2023, ANTONIO ALAMO, M.D. wrote 217 Medicare Part D claims totaling $12K in drug costs for 26 beneficiaries.
Where is ANTONIO ALAMO, M.D. located?
ANTONIO ALAMO, M.D. is located at 56 N PECOS RD STE A, HENDERSON, NV, 89074. Phone: (702) 456-4011.
What is ANTONIO ALAMO, M.D.'s NPI number?
ANTONIO ALAMO, M.D.'s National Provider Identifier (NPI) is 1821013798, issued on 07/13/2006.
Does ANTONIO ALAMO, M.D. prescribe more brand-name or generic drugs?
ANTONIO ALAMO, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $7K in brand drug costs.
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 ANTONIO ALAMO, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ANTONIO ALAMO, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ANTONIO ALAMO, M.D. accept Medicare?
ANTONIO ALAMO, M.D. appears in CMS Medicare data with 217 Part D claims and 26 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ANTONIO ALAMO, M.D.'s credentials?
ANTONIO ALAMO, M.D.'s NPI is 1821013798 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