2026 NPPES data Rheumatology Physician NPI 1841386174 MD
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CLAUDIA KUZIS, MD

Rheumatology Physician in MOUNTAIN VIEW, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
904
Medicare Part D claims · 130 beneficiaries · Rheumatology Physician avg: 2K
Industry payments
$75.34
4 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

CLAUDIA KUZIS, MD filed 904 Medicare Part D claims in 2023 as a Rheumatology Physician in MOUNTAIN VIEW, California.

904
Part D claims, 2023
$75.34
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.

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

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

904 Top 25% higher than 75% 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%). This entry sits in this band. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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)

CLAUDIA KUZIS, 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 CLAUDIA KUZIS, MD?

Quality data not reported

NPI registry status

Active

Issued 10/05/2006

NPI 1841386174

Primary specialty

Rheumatology Physician

Mid-sized

6,181 US NPIs in this specialty

Medicare Part D claims

904 56% vs specialty avg

2023 prescription claims

Specialty avg: 2,054

Specialty distribution in California

How Rheumatology Physician compares to other specialties among California providers

California providers

Rheumatology Physician share within California

1. Rheumatology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Rheumatology Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Rheumatology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Rheumatology Physician ABMS/AOA estimate

Est. board-certified rate (Rheumatology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Rheumatology Physician) — ABMS / AOA estimate

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 KUZIS, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 701 E EL CAMINO REAL, MOUNTAIN VIEW, CA, 94040, with a listed phone of (650) 934-7808. NPI 1841386174 was issued on 10/05/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KUZIS 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 904 prescription claims written by this provider, covering 130 Medicare beneficiaries and totaling roughly $1.2 million in drug spend. 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.

Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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

701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040

Provider Details

NPI 1841386174
Specialty Rheumatology Physician
Credentials MD
Gender Female
NPI Issued 10/05/2006

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

Total received

$75

Largest payer

Novartis Pharmaceuticals Corporation

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 — California MBC 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 ~150K California medical licensees in 2023 — they are NOT specific to CLAUDIA KUZIS, MD. To verify CLAUDIA KUZIS, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

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

904
Total Claims
$1.2M
Total Drug Cost
130
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,996
Total Day Supply
58,745
Generic Drug Cost
$39K

Patient Demographics

Average Patient Age
75.4 years
Avg HCC Risk Score
1.40
Gender Split
76% female / 24% 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 KUZIS, 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
Prednisone
154
Methotrexate
Methotrexate Sodium
122
Hydroxychloroquine Sulfate
95
Alendronate Sodium
63
Allopurinol
48
Enbrel Sureclick
Etanercept
38
Humira(Cf) Pen
Adalimumab
26
Leflunomide
26
Folic Acid
22
Rinvoq
Upadacitinib
22

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

Rheumatology Physician Overview

How CLAUDIA KUZIS, MD fits within the Rheumatology Physician landscape nationally.

6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider

CLAUDIA KUZIS, MD's 904 claims are below the specialty average of 2,054.

Nearby Rheumatology Physician Providers in California

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

Compare Rheumatology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CLAUDIA KUZIS, MD's specialty?
CLAUDIA KUZIS, MD specializes in Rheumatology Physician and practices in MOUNTAIN VIEW, California. Credentials: MD.
How much does CLAUDIA KUZIS, MD prescribe under Medicare Part D?
In 2023, CLAUDIA KUZIS, MD wrote 904 Medicare Part D claims totaling $1.2M in drug costs for 130 beneficiaries.
Where is CLAUDIA KUZIS, MD located?
CLAUDIA KUZIS, MD is located at 701 E EL CAMINO REAL, MOUNTAIN VIEW, CA, 94040. Phone: (650) 934-7808.
What is CLAUDIA KUZIS, MD's NPI number?
CLAUDIA KUZIS, MD's National Provider Identifier (NPI) is 1841386174, issued on 10/05/2006.
How many Rheumatology Physician providers are there in the US?
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does CLAUDIA KUZIS, MD prescribe most often?
Based on 2023 Medicare Part D data, CLAUDIA KUZIS, MD's most frequently prescribed drugs include Prednisone, Methotrexate, Hydroxychloroquine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CLAUDIA KUZIS, MD accept Medicare?
CLAUDIA KUZIS, MD appears in CMS Medicare data with 904 Part D claims and 130 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CLAUDIA KUZIS, MD's credentials?
CLAUDIA KUZIS, MD's NPI is 1841386174 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