2026 NPPES data Specialist NPI 1851360663 M.D.
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Rodolfo Diaz, M.D.

Specialist in Vineland, New Jersey.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,608 in Specialist, 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
663
Medicare Part D claims · 324 beneficiaries · Specialist avg: 1K
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
86.8/100
▲ 4 pts above national avg 83.1 · Above neutral
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Rodolfo Diaz, M.D. reported a CMS MIPS final score of 86.8/100 - above the 83.1 national average - and filed 663 Medicare Part D claims in 2023.

86.8/100
MIPS score · +4 vs avg
663
Part D claims, 2023
97%
generic prescribing

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.

Rodolfo Diaz, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

87 Top 48% higher than 52% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). This entry sits in this band. 90+: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Where Rodolfo Diaz, M.D. sits

This provider among specialist peers

Across the 4,869 specialist providers who report both Medicare Part D prescribing and a MIPS quality score, Rodolfo Diaz, M.D. writes more Part D claims than 44% of them and scores higher on MIPS quality than 62% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.148.372.496.6Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 80Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 72Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 25Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 78Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 22Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 23Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 60Rodolfo Diaz, M.D.-Part D claim volume, percentile in specialty: 44 · MIPS quality, percentile: 62
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one specialist peer from a representative sample of 60; the gold marker is Rodolfo Diaz, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

What does the federal data show about Rodolfo Diaz, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 03/15/2006

NPI 1851360663

Primary specialty

Specialist

High-volume

69,608 US NPIs in this specialty

Medicare Part D claims

663 55% vs specialty avg

2023 prescription claims

Specialty avg: 1,474

MIPS final score

86.8/100 3.7 pts vs avg

Above neutral band

vs 83.1 national avg

Specialty distribution in New Jersey

How Specialist compares to other specialties among New Jersey providers

New Jersey providers
Mental Health Counselor - 6.2%Mental Health Counselor6.2%Physical Therapist - 5.9%Physical Therapist5.9%Clinical Social Worker - 5.5%Clinical Social Worker5.5%Student in an Organized Health Care Education/Training Program - 5.4%Student in an Organized Health Care Education/Training Program5.4%Pharmacist - 5%Pharmacist5%Internal Medicine Physician - 3.1%Internal Medicine Physician3.1%Specialist - 1.2%Specialist1.2%
Largest specialties in New Jersey (% of in-state providers)

Medicare quality performance, MIPS

Rodolfo Diaz, M.D.'s 2023 MIPS final score plotted against the Specialist national average

High performer (top quartile)
MIPS Final Score
86.8/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Specialist) - 86.8/100 vs national avg 83.1

0%100%National avg83%86.8%
MIPS final score (Specialist) - 86.8/100 vs national avg 83.1
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).

Rodolfo Diaz, M.D. appears in the CMS NPPES registry as a Specialist provider holding M.D. credentials at 1206 W SHERMAN AVE STE 2B, Vineland, NJ, 08360, with a listed phone of (856) 696-5510. NPI 1851360663 was issued on 03/15/2006.

Medicare Part D records for calendar year 2023 show 663 prescription claims written by this provider, covering 324 Medicare beneficiaries and totaling roughly $17K in drug spend, split 3% brand-name and 97% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 86.8/100 for the 2023 performance year (Quality 71.7), compared with the national average of 83.1.

Specialist is a high-volume specialty nationwide, with 69,608 enrolled providers across 55 states and an average of 1,474 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

1206 W SHERMAN AVE STE 2B
Vineland, NJ 08360

Provider Details

NPI 1851360663
Specialty Specialist
Credentials M.D.
Gender Male
NPI Issued 03/15/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

86.7779
Final Score
Avg: 83.1
71.7033
Quality
93
Promoting Interoperability

Reporting: Individual

Hospital and facility affiliations

Facilities where Rodolfo Diaz, 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.

Ear,nose And Throat Specialists,pc
Vineland, NJ

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 · Generic-heavy

Rodolfo Diaz, M.D. - brand share 3.0%
Specialist average

3% brand-name claims vs 97% generic, on 663 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.

663
Total Claims
$17K
Total Drug Cost
324
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
689
Total Day Supply
11,137
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$3K
Generic Drug Cost
$14K
Antibiotic Claims
194

Patient Demographics

Average Patient Age
71.0 years
Avg HCC Risk Score
1.47
Gender Split
58% female / 42% male
Age Distribution
<65: 60, 65-74: 132, 75-84: 107, 85+: 25

Top Prescribed Drugs (Medicare Part D)

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

What Rodolfo Diaz, 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
Fluticasone Propionate
125
Prednisone
122
Cefuroxime
Cefuroxime Axetil
86
Neomycin-Polymyxin-Hc
Neomycin/Polymyxin B/Hydrocort
52
Fluocinolone Acetonide Oil
41
Montelukast Sodium
41
Azithromycin
39
Cefdinir
35
Ofloxacin
18
Hydrocortisone-Acetic Acid
Hydrocortisone/Acetic Acid
17

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

Specialist Overview

How Rodolfo Diaz, M.D. fits within the Specialist landscape nationally.

69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider

Rodolfo Diaz, M.D.'s 663 claims are below the specialty average of 1,474.

Nearby Specialist Providers in New Jersey

Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Diaz.

Compare Specialist 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 New Jersey medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Specialist 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 Rodolfo Diaz, M.D.'s specialty?
Rodolfo Diaz, M.D. specializes in Specialist and practices in Vineland, New Jersey. Credentials: M.D..
How much does Rodolfo Diaz, M.D. prescribe under Medicare Part D?
In 2023, Rodolfo Diaz, M.D. wrote 663 Medicare Part D claims totaling $17K in drug costs for 324 beneficiaries.
What is Rodolfo Diaz, M.D.'s Medicare quality score?
Rodolfo Diaz, M.D. has a CMS MIPS Final Score of 86.8/100 (Quality: 71.7). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Rodolfo Diaz, M.D. located?
Rodolfo Diaz, M.D. is located at 1206 W SHERMAN AVE STE 2B, Vineland, NJ, 08360. Phone: (856) 696-5510.
What is Rodolfo Diaz, M.D.'s NPI number?
Rodolfo Diaz, M.D.'s National Provider Identifier (NPI) is 1851360663, issued on 03/15/2006.
Does Rodolfo Diaz, M.D. prescribe more brand-name or generic drugs?
Rodolfo Diaz, M.D.'s prescribing is 3% brand-name and 97% generic drugs by claim count, with $3K in brand drug costs.
How many Specialist providers are there in the US?
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Rodolfo Diaz, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Rodolfo Diaz, M.D.'s most frequently prescribed drugs include Fluticasone Propionate, Prednisone, Cefuroxime. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Rodolfo Diaz, M.D. accept Medicare?
Rodolfo Diaz, M.D. appears in CMS Medicare data with 663 Part D claims and 324 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Rodolfo Diaz, M.D.'s credentials?
Rodolfo Diaz, M.D.'s NPI is 1851360663 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

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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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.