NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1174964159 M.D.
Verify on CMS → Ngaruiya Kariuki, M.D.
Endocrinology, Diabetes & Metabolism Physician in Sheboygan, 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 7,871 in Endocrinology, Diabetes & Metabolism 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 · 491 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
32%
generic claims · 58% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$203.21
12 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Ngaruiya Kariuki, M.D. filed 2,312 Medicare Part D claims in 2023 as an Endocrinology, Diabetes & Metabolism Physician in Sheboygan, Wisconsin, prescribing 32% generic.
- 2K
- Part D claims, 2023
- 32%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥86th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1174964159 · Endocrinology, Diabetes & Metabolism Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1174964159
- ENUM-MID 2013
- TAX-MID 8K Endocrinology, Diabetes
- RX-MID 2,312
- BOOK-THIN 139 in Wisconsin
- PHOTO-ENUM Sarang Patel · 2013
Ngaruiya Kariuki, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,312 ≥ 86th percentile 86% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Ngaruiya Kariuki, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Ngaruiya Kariuki, M.D.?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
2,312 12% vs specialty avg
Specialty distribution in Wisconsin
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Wisconsin 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 Endocrinology, Diabetes & Metabolism 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).
Practice Address
Provider Details
| NPI | 1174964159 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/08/2013 |
Hospital and facility affiliations
Facilities where Ngaruiya Kariuki, 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.
Healthtexas Provider Network
Frisco, TX
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 Ngaruiya Kariuki, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$203
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
Ngaruiya Kariuki, M.D. - brand share 58.0%
Endocrinology, Diabetes & Metabolism Physician average
58% brand-name claims vs 32% generic, on 2,312 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.
2,312
Total Claims
$1.5M
Total Drug Cost
491
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,111
- Total Day Supply
- 150,500
- Brand vs Generic
- 58% brand / 32% generic
- Brand Drug Cost
- $1.4M
- Generic Drug Cost
- $32K
Patient Demographics
- Average Patient Age
- 70.0 years
- Avg HCC Risk Score
- 1.70
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 83, 65-74: 247, 75-84: 140, 85+: 21
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ngaruiya Kariuki, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
319 claims
- Trulicity
Trulicity
154 claims
- Ozempic
Ozempic
142 claims
- Jardiance 119
Jardiance
119 claims
- Metformin Hcl 97
Metformin Hcl
97 claims
- Metformin Hcl Er 97
Metformin Hcl Er
97 claims
- Synthroid 85
Synthroid
85 claims
- Atorvastatin Calcium 72
Atorvastatin Calcium
72 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 319 |
| Trulicity Dulaglutide | 154 |
| Ozempic Semaglutide | 142 |
| Jardiance Empagliflozin | 119 |
| Metformin Hcl | 97 |
| Metformin Hcl Er Metformin Hcl | 97 |
| Synthroid Levothyroxine Sodium | 85 |
| Atorvastatin Calcium | 72 |
| Novolog Flexpen Insulin Aspart | 69 |
| Methimazole | 63 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in WI →
All providers in Wisconsin →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Ngaruiya Kariuki, M.D. fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,871
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Ngaruiya Kariuki, M.D.'s 2,312 claims are below the specialty average of 2,639.
Nationwide Endocrinology, Diabetes & Metabolism Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Kariuki, both outside Wisconsin so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Kariuki.
One of 139 Endocrinology, Diabetes & Metabolism Physician providers enrolled in Wisconsin, 5 are shown here.
Dr. Laura Andrews
MD
Menasha, WI
Dr. Arnold Asp
MD
La Crosse, WI
Dr. Pamela Baeten
M.D.
Green Bay, WI
Dr. Adrienne Barnosky
D.O.
Wauwatosa, WI
Dr. Jaspreet Batth
MD
Sheboygan, WI
Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Ngaruiya Kariuki, M.D.'s specialty? ▼
Ngaruiya Kariuki, M.D. specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Sheboygan, Wisconsin. Credentials: M.D..
How much does Ngaruiya Kariuki, M.D. prescribe under Medicare Part D? ▼
In 2023, Ngaruiya Kariuki, M.D. wrote 2,312 Medicare Part D claims totaling $1.5M in drug costs for 491 beneficiaries.
Where is Ngaruiya Kariuki, M.D. located? ▼
Ngaruiya Kariuki, M.D. is located at 2414 KOHLER MEMORIAL DR, Sheboygan, WI, 53081. Phone: (192) 045-7446.
What is Ngaruiya Kariuki, M.D.'s NPI number? ▼
Ngaruiya Kariuki, M.D.'s National Provider Identifier (NPI) is 1174964159, issued on 07/08/2013.
Does Ngaruiya Kariuki, M.D. prescribe more brand-name or generic drugs? ▼
Ngaruiya Kariuki, M.D.'s prescribing is 58% brand-name and 32% generic drugs by claim count, with $1.4M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,871 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Ngaruiya Kariuki, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ngaruiya Kariuki, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Trulicity, Ozempic. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ngaruiya Kariuki, M.D. accept Medicare? ▼
Ngaruiya Kariuki, M.D. appears in CMS Medicare data with 2,312 Part D claims and 491 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ngaruiya Kariuki, M.D.'s credentials? ▼
Ngaruiya Kariuki, M.D.'s NPI is 1174964159 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.
- 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
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.