2026 NPPES data Nephrology Physician NPI 1275634248 MD
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JIM-JER HWU, MD

Nephrology Physician in MONTEREY PARK, 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
9K
Medicare Part D claims · 748 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$89.61
4 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: JIM-JER HWU, MD is a Nephrology Physician ([object Object]) practicing in MONTEREY PARK, California with a Medicare Part D prescribing footprint of 9K claims across 748 beneficiaries — 14% brand-name prescribing . Industry payments of $89.61 across 4 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: JIM-JER HWU, MD filed 8,892 Medicare Part D claims in 2023 across MONTEREY PARK, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

JIM-JER HWU, 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).

JIM-JER HWU, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 09/25/2006

NPI 1275634248

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

8,892 512% 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).

JIM-JER HWU, MD is a Nephrology Physician provider practicing in MONTEREY PARK, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1275634248. 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.

JIM-JER HWU, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 120 E EMERSON AVE, MONTEREY PARK, CA, 91755, with a listed phone of (626) 280-0676. NPI 1275634248 was issued on 09/25/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HWU 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 8,892 prescription claims written by this provider, covering 748 Medicare beneficiaries and totaling roughly $1.3 million in drug spend, split 14% brand-name and 86% 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

120 E EMERSON AVE
MONTEREY PARK, CA 91755

Provider Details

NPI 1275634248
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 09/25/2006

Hospital and facility affiliations

Facilities where JIM-JER HWU, 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.

GOLDEN PACIFIC NEPHROLOGY MEDICAL CLINIC INC
MONTEREY PARK, 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 JIM-JER HWU, MD. Source: openpaymentsdata.cms.gov.

Total received

$90

Largest payer

AKEBIA 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 JIM-JER HWU, MD. To verify JIM-JER HWU, 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

JIM-JER HWU, MD — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 8,892 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.

8,892
Total Claims
$1.3M
Total Drug Cost
748
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
14,605
Total Day Supply
428,482
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$903K
Generic Drug Cost
$402K
Antibiotic Claims
139

Patient Demographics

Average Patient Age
75.1 years
Avg HCC Risk Score
3.85
Gender Split
41% female / 59% male
Age Distribution
<65: 100, 65-74: 229, 75-84: 266, 85+: 153

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Amlodipine Besylate
637
Hydralazine Hcl
445
Olmesartan Medoxomil
404
Atorvastatin Calcium
298
Allopurinol
288
Losartan Potassium
255
Metoprolol Succinate
252
Furosemide
230
Carvedilol
219
Calcium Acetate
204

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

Nephrology Physician Overview

How JIM-JER HWU, 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

JIM-JER HWU, MD's 8,892 claims are above 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 HWU.

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

Frequently Asked Questions

What is JIM-JER HWU, MD's specialty?
JIM-JER HWU, MD specializes in Nephrology Physician and practices in MONTEREY PARK, California. Credentials: MD.
How much does JIM-JER HWU, MD prescribe under Medicare Part D?
In 2023, JIM-JER HWU, MD wrote 8,892 Medicare Part D claims totaling $1.3M in drug costs for 748 beneficiaries.
Where is JIM-JER HWU, MD located?
JIM-JER HWU, MD is located at 120 E EMERSON AVE, MONTEREY PARK, CA, 91755. Phone: (626) 280-0676.
What is JIM-JER HWU, MD's NPI number?
JIM-JER HWU, MD's National Provider Identifier (NPI) is 1275634248, issued on 09/25/2006.
Does JIM-JER HWU, MD prescribe more brand-name or generic drugs?
JIM-JER HWU, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $903K 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 JIM-JER HWU, MD prescribe most often?
Based on 2023 Medicare Part D data, JIM-JER HWU, MD's most frequently prescribed drugs include Amlodipine Besylate, Hydralazine Hcl, Olmesartan Medoxomil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JIM-JER HWU, MD accept Medicare?
JIM-JER HWU, MD appears in CMS Medicare data with 8,892 Part D claims and 748 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JIM-JER HWU, MD's credentials?
JIM-JER HWU, MD's NPI is 1275634248 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