2026 NPPES data Nephrology Physician NPI 1356326987 MD
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Alfonso Chavez, MD

Nephrology Physician in El Paso, 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 10,534 in Nephrology 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
3K
Medicare Part D claims · 276 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
85%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$223.42
11 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Alfonso Chavez, MD filed 3,183 Medicare Part D claims in 2023 as a Nephrology Physician in El Paso, Texas, prescribing 85% generic.

3K
Part D claims, 2023
85%
generic prescribing
$223.42
industry payments (Sunshine Act)

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 Chavez, MD's Medicare Part D volume vs every U.S. prescriber

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

3,183 Top 11% higher than 89% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2K+: 213,991 prescribers (16%). This entry sits in this band. 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-eligible specialty (heuristic, not verified)

Alfonso Chavez, 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 Alfonso Chavez, MD?

Quality data not reported

NPI registry status

Active

Issued 12/06/2005

NPI 1356326987

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

3,183 119% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in Texas

How Nephrology Physician compares to other specialties among Texas providers

Texas providers

Largest specialties in Texas (% of in-state providers)

Behavior Technician - 5.6%Behavior Technician5.6%Student in an Organized Health Care Education/Training Program - 5.1%Student in an Organized Health Care Education/Training Program5.1%Family Nurse Practitioner - 4.5%Family Nurse Practitioner4.5%Professional Counselor - 4.4%Professional Counselor4.4%Pharmacist - 4.4%Pharmacist4.4%Speech-Language Pathologist - 3.9%Speech-Language Pathologist3.9%Nephrology Physician - 0.2%Nephrology Physician0.2%
Largest specialties in Texas (% 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 Nephrology 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).

Alfonso Chavez, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 1527 BROWN ST STE A, El Paso, TX, 79902, with a listed phone of (915) 532-2693. NPI 1356326987 was issued on 12/06/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Chavez 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 3,183 prescription claims written by this provider, covering 276 Medicare beneficiaries and totaling roughly $282K in drug spend, split 14% brand-name and 85% generic by claim count, with an opioid prescribing rate of 1.6%. 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.

Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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

1527 BROWN ST STE A
El Paso, TX 79902

Provider Details

NPI 1356326987
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 12/06/2005

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 Chavez, MD. Source: openpaymentsdata.cms.gov.

Total received

$223

Largest payer

Otsuka America Pharmaceutical, 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.

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 Alfonso Chavez, MD. To verify Alfonso Chavez, 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.

Brand vs generic prescribing mix · Typical

Alfonso Chavez, MD - brand share 14.0%
Nephrology Physician average

14% brand-name claims vs 85% generic, on 3,183 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.

3,183
Total Claims
$282K
Total Drug Cost
276
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,507
Total Day Supply
187,280
Brand vs Generic
14% brand / 85% generic
Brand Drug Cost
$175K
Generic Drug Cost
$104K
Opioid Claims
52 (1.6% rate)
Antibiotic Claims
145

Patient Demographics

Average Patient Age
74.5 years
Avg HCC Risk Score
3.11
Gender Split
53% female / 47% male
Age Distribution
<65: 37, 65-74: 93, 75-84: 96, 85+: 50

Top Prescribed Drugs (Medicare Part D)

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

What Alfonso Chavez, MD 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
Levothyroxine Sodium
122
Alprazolam
97
Furosemide
94
Losartan Potassium
91
Calcium Acetate
85
Allopurinol
78
Carvedilol
78
Lisinopril
78
Hydralazine Hcl
75
Prednisone
71

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

Nephrology Physician Overview

How Alfonso Chavez, MD fits within the Nephrology Physician landscape nationally.

10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider

Alfonso Chavez, MD's 3,183 claims are above the specialty average of 1,454.

Nearby Nephrology Physician Providers in Texas

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

Compare Nephrology 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 Nephrology 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 Alfonso Chavez, MD's specialty?
Alfonso Chavez, MD specializes in Nephrology Physician and practices in El Paso, Texas. Credentials: MD.
How much does Alfonso Chavez, MD prescribe under Medicare Part D?
In 2023, Alfonso Chavez, MD wrote 3,183 Medicare Part D claims totaling $282K in drug costs for 276 beneficiaries.
Where is Alfonso Chavez, MD located?
Alfonso Chavez, MD is located at 1527 BROWN ST STE A, El Paso, TX, 79902. Phone: (915) 532-2693.
What is Alfonso Chavez, MD's NPI number?
Alfonso Chavez, MD's National Provider Identifier (NPI) is 1356326987, issued on 12/06/2005.
Does Alfonso Chavez, MD prescribe more brand-name or generic drugs?
Alfonso Chavez, MD's prescribing is 14% brand-name and 85% generic drugs by claim count, with $175K in brand drug costs.
Does Alfonso Chavez, MD prescribe opioids?
Yes, Alfonso Chavez, MD had 52 opioid claims in 2023 with an opioid prescribing rate of 1.6%.
How many Nephrology Physician providers are there in the US?
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Alfonso Chavez, MD prescribe most often?
Based on 2023 Medicare Part D data, Alfonso Chavez, MD's most frequently prescribed drugs include Levothyroxine Sodium, Alprazolam, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alfonso Chavez, MD accept Medicare?
Alfonso Chavez, MD appears in CMS Medicare data with 3,183 Part D claims and 276 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alfonso Chavez, MD's credentials?
Alfonso Chavez, MD's NPI is 1356326987 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

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.