2026 NPPES data Internal Medicine Physician NPI 1184135949 MD
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Claudia Istrate, MD

Internal Medicine Physician in Wausau, Wisconsin. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 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 · 125 beneficiaries · Internal Medicine Physician avg: 3K
MIPS score
78.9/100
▼ 4 pts below national avg 83.1 · Above neutral
Industry payments
$101.76
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Claudia Istrate, MD reported a CMS MIPS final score of 78.9/100 - below the 83.1 national average - and filed 2,165 Medicare Part D claims in 2023.

78.9/100
MIPS score · -4 vs avg
2K
Part D claims, 2023
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.

Claudia Istrate, MD's MIPS score vs every scored U.S. clinician

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

79 27th percentile higher than 27% 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%). This entry sits in this band. 80–90: 129,887 scored providers (27%). Above this entry. 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 Claudia Istrate, MD sits

This provider among internal medicine physician peers

Across the 36,260 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Claudia Istrate, MD writes more Part D claims than 66% of them and scores higher on MIPS quality than 28% - placing this provider in the high-volume, lower-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 quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 25Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 33Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 2Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 32Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 35Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 72Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 95Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 37Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 80Claudia Istrate, MD-Part D claim volume, percentile in specialty: 66 · MIPS quality, percentile: 28
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Claudia Istrate, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

Board certification likely (heuristic, not verified)

Claudia Istrate, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Claudia Istrate, MD?

Near national average

NPI registry status

Active

Issued 10/19/2017

NPI 1184135949

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

2,165 20% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

MIPS final score

78.9/100 4.2 pts vs avg

Above neutral band

vs 83.1 national avg

Specialty distribution in Wisconsin

How Internal Medicine Physician compares to other specialties among Wisconsin providers

Wisconsin providers

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

Physical Therapist - 5.6%Physical Therapist5.6%Pharmacist - 4.8%Pharmacist4.8%Registered Nurse - 4.5%Registered Nurse4.5%Professional Counselor - 3.3%Professional Counselor3.3%Student in an Organized Health Care Education/Training Program - 3.3%Student in an Organized Health Care Education/Training Program3.3%Family Medicine Physician - 3.2%Family Medicine Physician3.2%Internal Medicine Physician - 2.5%Internal Medicine Physician2.5%
Largest specialties in Wisconsin (% of in-state providers)

Medicare quality performance, MIPS

Claudia Istrate, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average

Near national average
MIPS Final Score
78.9/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Internal Medicine Physician) - 78.9/100 vs national avg 83.1

0%100%National avg83%78.9%
MIPS final score (Internal Medicine Physician) - 78.9/100 vs national avg 83.1

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).

Claudia Istrate, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 2727 PLAZA DR, Wausau, WI, 54401, with a listed phone of (715) 847-3000. NPI 1184135949 was issued on 10/19/2017. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Istrate 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 2,165 prescription claims written by this provider, covering 125 Medicare beneficiaries and totaling roughly $129K in drug spend, with an opioid prescribing rate of 3.6%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 78.9/100 for the 2023 performance year (Quality 66.7, Cost 54.9), compared with the national average of 83.1.

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

2727 PLAZA DR
Wausau, WI 54401

Provider Details

NPI 1184135949
Specialty Internal Medicine Physician
Credentials MD
Gender Female
NPI Issued 10/19/2017

CMS Quality Score (MIPS)

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

78.8552
Final Score
Avg: 83.1
66.6851
Quality
54.8733
Cost
99
Promoting Interoperability

Reporting: Group practice

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 Claudia Istrate, MD. Source: openpaymentsdata.cms.gov.

Total received

$102

Largest payer

Inari 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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

2,165
Total Claims
$129K
Total Drug Cost
125
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,186
Total Day Supply
41,986
Generic Drug Cost
$36K
Opioid Claims
79 (3.6% rate)
Antibiotic Claims
52

Patient Demographics

Average Patient Age
83.0 years
Avg HCC Risk Score
2.04
Gender Split
70% female / 30% male

Top Prescribed Drugs (Medicare Part D)

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

What Claudia Istrate, 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
Furosemide
136
Amlodipine Besylate
127
Lisinopril
92
Atorvastatin Calcium
91
Metoprolol Tartrate
68
Metoprolol Succinate
56
Metformin Hcl
52
Potassium Chloride
51
Duloxetine Hcl
50
Tramadol Hcl
50

* 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 Claudia Istrate, MD 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

Claudia Istrate, MD's 2,165 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Wisconsin

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

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 Wisconsin 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.

Frequently Asked Questions

What is Claudia Istrate, MD's specialty?
Claudia Istrate, MD specializes in Internal Medicine Physician and practices in Wausau, Wisconsin. Credentials: MD.
How much does Claudia Istrate, MD prescribe under Medicare Part D?
In 2023, Claudia Istrate, MD wrote 2,165 Medicare Part D claims totaling $129K in drug costs for 125 beneficiaries.
What is Claudia Istrate, MD's Medicare quality score?
Claudia Istrate, MD has a CMS MIPS Final Score of 78.9/100 (Quality: 66.7, Cost: 54.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Claudia Istrate, MD located?
Claudia Istrate, MD is located at 2727 PLAZA DR, Wausau, WI, 54401. Phone: (715) 847-3000.
What is Claudia Istrate, MD's NPI number?
Claudia Istrate, MD's National Provider Identifier (NPI) is 1184135949, issued on 10/19/2017.
Does Claudia Istrate, MD prescribe opioids?
Yes, Claudia Istrate, MD had 79 opioid claims in 2023 with an opioid prescribing rate of 3.6%.
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 Claudia Istrate, MD prescribe most often?
Based on 2023 Medicare Part D data, Claudia Istrate, MD's most frequently prescribed drugs include Furosemide, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Claudia Istrate, MD accept Medicare?
Claudia Istrate, MD appears in CMS Medicare data with 2,165 Part D claims and 125 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Claudia Istrate, MD's credentials?
Claudia Istrate, MD's NPI is 1184135949 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.
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.