2026 NPPES data Case Management Registered Nurse NPI 1831694967 NURSE PRACTITIONER
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INNA LEMESHKO, NURSE PRACTITIONER

Case Management Registered Nurse in TARZANA, 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
56
Medicare Part D claims · 14 beneficiaries · Case Management Registered Nurse avg: 1K
Industry payments
$629.83
19 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

INNA LEMESHKO, NURSE PRACTITIONER filed 56 Medicare Part D claims in 2023 as a Case Management Registered Nurse in TARZANA, California.

56
Part D claims, 2023
$629.83
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.

INNA LEMESHKO, NURSE PRACTITIONER's Medicare Part D volume vs every U.S. prescriber

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

56 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 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

What does the federal data show about INNA LEMESHKO, NURSE PRACTITIONER?

Quality data not reported

NPI registry status

Active

Issued 03/29/2018

NPI 1831694967

Primary specialty

Case Management Registered Nurse

Mid-sized

5,464 US NPIs in this specialty

Medicare Part D claims

56 95% vs specialty avg

2023 prescription claims

Specialty avg: 1,066

Specialty distribution in California

How Case Management Registered Nurse compares to other specialties among California providers

California providers

Case Management Registered Nurse share within California

1. Case Management Registered Nurse42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Case Management Registered Nurse share within California

Specialty board-certification context

Estimated specialty board-certified rate — Case Management Registered Nurse (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Case Management Registered Nurse ABMS/AOA estimate

Est. board-certified rate (Case Management Registered Nurse) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Case Management Registered Nurse) — 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).

INNA LEMESHKO, NURSE PRACTITIONER appears in the CMS NPPES registry as a Case Management Registered Nurse provider holding NURSE PRACTITIONER credentials at 18646 OXNARD ST, TARZANA, CA, 91356, with a listed phone of (818) 996-1051. NPI 1831694967 was issued on 03/29/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LEMESHKO 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 56 prescription claims written by this provider, covering 14 Medicare beneficiaries and totaling roughly $2K 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.

Case Management Registered Nurse is a mid-sized specialty nationwide, with 5,464 enrolled providers across 53 states and an average of 1,066 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

18646 OXNARD ST
TARZANA, CA 91356

Provider Details

NPI 1831694967
Specialty Case Management Registered Nurse
Credentials NURSE PRACTITIONER
Gender Female
NPI Issued 03/29/2018

Hospital and facility affiliations

Facilities where INNA LEMESHKO, NURSE PRACTITIONER 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.

TARZANA TREATMENT CENTERS INC
TARZANA, CA

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 INNA LEMESHKO, NURSE PRACTITIONER. Source: openpaymentsdata.cms.gov.

Total received

$630

Largest payer

ITI, Inc. (d/b/a Intra-Cellular Therapies, 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 — 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 INNA LEMESHKO, NURSE PRACTITIONER. To verify INNA LEMESHKO, NURSE PRACTITIONER'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.

56
Total Claims
$2K
Total Drug Cost
14
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
58
Total Day Supply
1,678
Brand Drug Cost
$0
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
59.4 years
Avg HCC Risk Score
1.50

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Mirtazapine
12

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

Case Management Registered Nurse Overview

How INNA LEMESHKO, NURSE PRACTITIONER fits within the Case Management Registered Nurse landscape nationally.

5,464
Case Management Registered Nurse Providers in US
53
States with Case Management Registered Nurse
1,066
Avg Claims per Provider

INNA LEMESHKO, NURSE PRACTITIONER's 56 claims are below the specialty average of 1,066.

Nearby Case Management Registered Nurse Providers in California

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

Compare Case Management Registered Nurse nationally: see state-by-state distribution →

Frequently Asked Questions

What is INNA LEMESHKO, NURSE PRACTITIONER's specialty?
INNA LEMESHKO, NURSE PRACTITIONER specializes in Case Management Registered Nurse and practices in TARZANA, California. Credentials: NURSE PRACTITIONER.
How much does INNA LEMESHKO, NURSE PRACTITIONER prescribe under Medicare Part D?
In 2023, INNA LEMESHKO, NURSE PRACTITIONER wrote 56 Medicare Part D claims totaling $2K in drug costs for 14 beneficiaries.
Where is INNA LEMESHKO, NURSE PRACTITIONER located?
INNA LEMESHKO, NURSE PRACTITIONER is located at 18646 OXNARD ST, TARZANA, CA, 91356. Phone: (818) 996-1051.
What is INNA LEMESHKO, NURSE PRACTITIONER's NPI number?
INNA LEMESHKO, NURSE PRACTITIONER's National Provider Identifier (NPI) is 1831694967, issued on 03/29/2018.
How many Case Management Registered Nurse providers are there in the US?
There are 5,464 Case Management Registered Nurse providers across 53 states in the US. The average Case Management Registered Nurse provider writes 1,066 Medicare Part D claims per year.
What drugs does INNA LEMESHKO, NURSE PRACTITIONER prescribe most often?
Based on 2023 Medicare Part D data, INNA LEMESHKO, NURSE PRACTITIONER's most frequently prescribed drugs include Mirtazapine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does INNA LEMESHKO, NURSE PRACTITIONER accept Medicare?
INNA LEMESHKO, NURSE PRACTITIONER appears in CMS Medicare data with 56 Part D claims and 14 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify INNA LEMESHKO, NURSE PRACTITIONER's credentials?
INNA LEMESHKO, NURSE PRACTITIONER's NPI is 1831694967 with credentials NURSE PRACTITIONER. 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