2026 NPPES data Obstetrics & Gynecology Physician NPI 1558604678 MD
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NKIRUKA CHUBA, MD

Obstetrics & Gynecology Physician in NEWPORT BEACH, 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
85
Medicare Part D claims · 26 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$785.75
8 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

NKIRUKA CHUBA, MD filed 85 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in NEWPORT BEACH, California, prescribing 74% generic.

85
Part D claims, 2023
74%
generic prescribing
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.

NKIRUKA CHUBA, MD's Medicare Part D volume vs every U.S. prescriber

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

85 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

Board certification likely (heuristic — not verified)

NKIRUKA CHUBA, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — 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 NKIRUKA CHUBA, MD?

Quality data not reported

NPI registry status

Active

Issued 03/27/2013

NPI 1558604678

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

85 53% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in California

How Obstetrics & Gynecology Physician compares to other specialties among California providers

California providers

Obstetrics & Gynecology Physician share within California

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

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology 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).

NKIRUKA CHUBA, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 4000 MACARTHUR BLVD STE 110, NEWPORT BEACH, CA, 92660, with a listed phone of (949) 445-8768. NPI 1558604678 was issued on 03/27/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHUBA 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 85 prescription claims written by this provider, covering 26 Medicare beneficiaries and totaling roughly $15K in drug spend, split 26% brand-name and 74% generic by claim count. 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.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 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

4000 MACARTHUR BLVD STE 110
NEWPORT BEACH, CA 92660

Provider Details

NPI 1558604678
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Female
NPI Issued 03/27/2013

Hospital and facility affiliations

Facilities where NKIRUKA CHUBA, MD 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.

REGENTS OF THE UNIVERSITY OF CALIFORNIA
ORANGE, CA
UNIVERSITY OF CALIFORNIA IRVINE
SANTA ANA, 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 NKIRUKA CHUBA, MD. Source: openpaymentsdata.cms.gov.

Total received

$786

Largest payer

INTUITIVE SURGICAL, 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 NKIRUKA CHUBA, MD. To verify NKIRUKA CHUBA, 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.

Brand vs generic prescribing mix · Above average

NKIRUKA CHUBA, MD — brand share 26.0%
Specialty average (est.)

26% brand-name claims vs 74% generic, on 85 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.

85
Total Claims
$15K
Total Drug Cost
26
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
142
Total Day Supply
3,970
Brand vs Generic
26% brand / 74% generic
Brand Drug Cost
$10K
Generic Drug Cost
$5K
Antibiotic Claims
11

Patient Demographics

Average Patient Age
62.2 years
Avg HCC Risk Score
1.10
Gender Split
100% female / 0% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Estradiol
25

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

Obstetrics & Gynecology Physician Overview

How NKIRUKA CHUBA, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

NKIRUKA CHUBA, MD's 85 claims are below the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in California

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

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is NKIRUKA CHUBA, MD's specialty?
NKIRUKA CHUBA, MD specializes in Obstetrics & Gynecology Physician and practices in NEWPORT BEACH, California. Credentials: MD.
How much does NKIRUKA CHUBA, MD prescribe under Medicare Part D?
In 2023, NKIRUKA CHUBA, MD wrote 85 Medicare Part D claims totaling $15K in drug costs for 26 beneficiaries.
Where is NKIRUKA CHUBA, MD located?
NKIRUKA CHUBA, MD is located at 4000 MACARTHUR BLVD STE 110, NEWPORT BEACH, CA, 92660. Phone: (949) 445-8768.
What is NKIRUKA CHUBA, MD's NPI number?
NKIRUKA CHUBA, MD's National Provider Identifier (NPI) is 1558604678, issued on 03/27/2013.
Does NKIRUKA CHUBA, MD prescribe more brand-name or generic drugs?
NKIRUKA CHUBA, MD's prescribing is 26% brand-name and 74% generic drugs by claim count, with $10K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does NKIRUKA CHUBA, MD prescribe most often?
Based on 2023 Medicare Part D data, NKIRUKA CHUBA, MD's most frequently prescribed drugs include Estradiol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NKIRUKA CHUBA, MD accept Medicare?
NKIRUKA CHUBA, MD appears in CMS Medicare data with 85 Part D claims and 26 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NKIRUKA CHUBA, MD's credentials?
NKIRUKA CHUBA, MD's NPI is 1558604678 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