2026 NPPES data Nephrology Physician NPI 1740349489 MD
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JOSEPH KAHWAJI, MD

Nephrology Physician in LOS ANGELES, 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
965
Medicare Part D claims · 219 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$29.7
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: JOSEPH KAHWAJI, MD is a Nephrology Physician ([object Object]) practicing in LOS ANGELES, California with a Medicare Part D prescribing footprint of 965 claims across 219 beneficiaries — 13% brand-name prescribing . Industry payments of $29.7 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: JOSEPH KAHWAJI, MD filed 965 Medicare Part D claims in 2023 across LOS ANGELES, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

JOSEPH KAHWAJI, MD 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).

JOSEPH KAHWAJI, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 12/08/2006

NPI 1740349489

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

965 34% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in California

How Nephrology Physician compares to other specialties among California providers

California providers

Nephrology Physician share within California

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Nephrology 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).

JOSEPH KAHWAJI, MD is a Nephrology Physician provider practicing in LOS ANGELES, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1740349489. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

JOSEPH KAHWAJI, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 4760 W SUNSET BLVD, LOS ANGELES, CA, 90027, with a listed phone of (323) 783-4011. NPI 1740349489 was issued on 12/08/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KAHWAJI 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 965 prescription claims written by this provider, covering 219 Medicare beneficiaries and totaling roughly $137K in drug spend, split 13% brand-name and 87% 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.

Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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

4760 W SUNSET BLVD
LOS ANGELES, CA 90027

Provider Details

NPI 1740349489
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 12/08/2006

Hospital and facility affiliations

Facilities where JOSEPH KAHWAJI, 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.

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP
LOS ANGELES, 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 JOSEPH KAHWAJI, MD. Source: openpaymentsdata.cms.gov.

Total received

$30

Largest payer

Travere Therapeutics, 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 JOSEPH KAHWAJI, MD. To verify JOSEPH KAHWAJI, 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 · Typical

JOSEPH KAHWAJI, MD — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 965 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.

965
Total Claims
$137K
Total Drug Cost
219
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,533
Total Day Supply
74,582
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$105K
Generic Drug Cost
$31K
Antibiotic Claims
67

Patient Demographics

Average Patient Age
63.7 years
Avg HCC Risk Score
4.47
Gender Split
38% female / 62% male
Age Distribution
<65: 85, 65-74: 96, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Prednisone
81
Amlodipine Besylate
70
Atorvastatin Calcium
65
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
39
Fluconazole
31
Metoprolol Tartrate
27
Nifedipine Er
Nifedipine
27
Furosemide
25
Rosuvastatin Calcium
25
Losartan Potassium
24

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

Nephrology Physician Overview

How JOSEPH KAHWAJI, MD fits within the Nephrology Physician landscape nationally.

10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider

JOSEPH KAHWAJI, MD's 965 claims are below the specialty average of 1,454.

Nearby Nephrology Physician Providers in California

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

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

Frequently Asked Questions

What is JOSEPH KAHWAJI, MD's specialty?
JOSEPH KAHWAJI, MD specializes in Nephrology Physician and practices in LOS ANGELES, California. Credentials: MD.
How much does JOSEPH KAHWAJI, MD prescribe under Medicare Part D?
In 2023, JOSEPH KAHWAJI, MD wrote 965 Medicare Part D claims totaling $137K in drug costs for 219 beneficiaries.
Where is JOSEPH KAHWAJI, MD located?
JOSEPH KAHWAJI, MD is located at 4760 W SUNSET BLVD, LOS ANGELES, CA, 90027. Phone: (323) 783-4011.
What is JOSEPH KAHWAJI, MD's NPI number?
JOSEPH KAHWAJI, MD's National Provider Identifier (NPI) is 1740349489, issued on 12/08/2006.
Does JOSEPH KAHWAJI, MD prescribe more brand-name or generic drugs?
JOSEPH KAHWAJI, MD's prescribing is 13% brand-name and 87% generic drugs by claim count, with $105K in brand drug costs.
How many Nephrology Physician providers are there in the US?
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does JOSEPH KAHWAJI, MD prescribe most often?
Based on 2023 Medicare Part D data, JOSEPH KAHWAJI, MD's most frequently prescribed drugs include Prednisone, Amlodipine Besylate, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOSEPH KAHWAJI, MD accept Medicare?
JOSEPH KAHWAJI, MD appears in CMS Medicare data with 965 Part D claims and 219 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOSEPH KAHWAJI, MD's credentials?
JOSEPH KAHWAJI, MD's NPI is 1740349489 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