NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1699915967 MD
Verify on CMS → Alfonso Ortiz, MD
Internal Medicine Physician in Las Vegas, Nevada.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 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
2K
Medicare Part D claims · 372 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
43%
generic claims · 51% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$120.26
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Alfonso Ortiz, MD filed 1,845 Medicare Part D claims in 2023 as a Internal Medicine Physician in Las Vegas, Nevada, prescribing 43% generic.
- 2K
- Part D claims, 2023
- 43%
- 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.
Alfonso Ortiz, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,845 Top 17% higher than 83% 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 certification likely (heuristic, not verified)
Alfonso Ortiz, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Alfonso Ortiz, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
1,845 32% vs specialty avg
Specialty distribution in Nevada
How Internal Medicine Physician compares to other specialties among Nevada 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:
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).
Alfonso Ortiz, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 540 N NELLIS BLVD, Las Vegas, NV, 89110, with a listed phone of (702) 677-3609. NPI 1699915967 was issued on 02/26/2009.
Medicare Part D records for calendar year 2023 show 1,845 prescription claims written by this provider, covering 372 Medicare beneficiaries and totaling roughly $957K in drug spend, split 51% brand-name and 43% generic by claim count.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 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
Provider Details
| NPI | 1699915967 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 02/26/2009 |
Hospital and facility affiliations
Facilities where Alfonso Ortiz, MD 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.
Essen Medical Associates, PC
Bronx, NY
Shakespeare Operating LLC
Bronx, NY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Alfonso Ortiz, MD. Source: openpaymentsdata.cms.gov.
Total received
$120
Largest payer
Medtronic, 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 · Brand-heavy
Alfonso Ortiz, MD - brand share 51.0%
Internal Medicine Physician average
51% brand-name claims vs 43% generic, on 1,845 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.
1,845
Total Claims
$957K
Total Drug Cost
372
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,053
- Total Day Supply
- 90,494
- Brand vs Generic
- 51% brand / 43% generic
- Brand Drug Cost
- $921K
- Generic Drug Cost
- $31K
Patient Demographics
- Average Patient Age
- 71.0 years
- Avg HCC Risk Score
- 2.05
- Gender Split
- 66% female / 34% male
- Age Distribution
- <65: 94, 65-74: 141, 75-84: 91, 85+: 46
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Alfonso Ortiz, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trulicity
Trulicity
256 claims
- Levothyroxine Sodium
Levothyroxine Sodium
133 claims
- Metformin Hcl
Metformin Hcl
104 claims
- Farxiga 86
Farxiga
86 claims
- Ozempic 86
Ozempic
86 claims
- Pioglitazone Hcl 84
Pioglitazone Hcl
84 claims
- Jardiance 71
Jardiance
71 claims
- Glimepiride 60
Glimepiride
60 claims
| Drug | Claims |
|---|---|
| Trulicity Dulaglutide | 256 |
| Levothyroxine Sodium | 133 |
| Metformin Hcl | 104 |
| Farxiga Dapagliflozin Propanediol | 86 |
| Ozempic Semaglutide | 86 |
| Pioglitazone Hcl | 84 |
| Jardiance Empagliflozin | 71 |
| Glimepiride | 60 |
| Tradjenta Linagliptin | 54 |
| Atorvastatin Calcium | 52 |
* 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 Alfonso Ortiz, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Alfonso Ortiz, MD's 1,845 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 Ortiz.
Dr. Cherylene Abalos
D.O.
Nellis Afb, NV
Dr. Kasey Abanonu
MD
Las Vegas, NV
Dr. Sherif Abdou
M.D.
Las Vegas, NV
Dr. Ijaz Abid
MD
North Las Vegas, NV
Dr. Nael Aboul-Hosn
D.O.
Carson City, NV
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 Nevada 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.
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Frequently Asked Questions
What is Alfonso Ortiz, MD's specialty? ▼
Alfonso Ortiz, MD specializes in Internal Medicine Physician and practices in Las Vegas, Nevada. Credentials: MD.
How much does Alfonso Ortiz, MD prescribe under Medicare Part D? ▼
In 2023, Alfonso Ortiz, MD wrote 1,845 Medicare Part D claims totaling $957K in drug costs for 372 beneficiaries.
Where is Alfonso Ortiz, MD located? ▼
Alfonso Ortiz, MD is located at 540 N NELLIS BLVD, Las Vegas, NV, 89110. Phone: (702) 677-3609.
What is Alfonso Ortiz, MD's NPI number? ▼
Alfonso Ortiz, MD's National Provider Identifier (NPI) is 1699915967, issued on 02/26/2009.
Does Alfonso Ortiz, MD prescribe more brand-name or generic drugs? ▼
Alfonso Ortiz, MD's prescribing is 51% brand-name and 43% generic drugs by claim count, with $921K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 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 Alfonso Ortiz, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Alfonso Ortiz, MD's most frequently prescribed drugs include Trulicity, Levothyroxine Sodium, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alfonso Ortiz, MD accept Medicare? ▼
Alfonso Ortiz, MD appears in CMS Medicare data with 1,845 Part D claims and 372 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alfonso Ortiz, MD's credentials? ▼
Alfonso Ortiz, MD's NPI is 1699915967 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.
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 May 2026.