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2026 NPPES data Hematology & Oncology Physician NPI 1154422004 M.D.
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James Chang, M.D.

Hematology & Oncology Physician in Bakersfield, California.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,232 in Hematology & Oncology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
368
Medicare Part D claims · 66 beneficiaries · Hematology & Oncology Physician avg: 847
MIPS score
91.6/100
▲ 8 pts above national avg 83.5 · Exceptional
Industry payments
$76.02
3 payments · CMS Open Payments (Sunshine Act)
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

James Chang, M.D. reported a CMS MIPS final score of 91.6/100 - above the 83.5 national average - and filed 368 Medicare Part D claims in 2023.

91.6/100
MIPS score · +8 vs avg
368
Part D claims, 2023
Likely
board-certified (heuristic)
≥61st
pct among measured MIPS (lower-bound band)

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.

CMS NPPES provider registry desk

NPI 1154422004 · Hematology & Oncology Physician

NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-ABOVE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1154422004
  • ENUM-LEGACY 2006
  • TAX-MID 11K Hematology &
  • MIPS-ABOVE 91.6/100
  • RX-LIGHT 368
  • BOOK-LIGHT 1,293 in California
  • PHOTO-FINISH Andrew Schneider · ±0.0

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

James Chang, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

92 ≥ 61st percentile 61% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured providers. 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where James Chang, M.D. sits

This provider among hematology & oncology physician peers

Across the 4,019 hematology & oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, James Chang, M.D. writes more Part D claims than 29% of them and scores higher on MIPS quality than 63% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.148.372.496.6Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 68James Chang, M.D., Part D claim volume, percentile in specialty: 29 · MIPS quality, percentile: 63
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one hematology & oncology physician peer from a representative sample of 60; the gold marker is James Chang, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

James Chang, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 James Chang, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 09/25/2006

NPI 1154422004

Primary specialty

Hematology & Oncology Physician

Mid-sized

11,232 US NPIs in this specialty

Medicare Part D claims

368 57% vs specialty avg

2023 prescription claims

Specialty avg: 847

MIPS final score

91.6/100 8.1 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in California

How Hematology & Oncology Physician compares to other specialties among California providers

California providers
Behavior Technician17.3%Marriage & Family Therapist5.5%Student in an Organized Heal…5%Mental Health Counselor3.9%Pharmacist3.5%Clinical Social Worker3.1%Hematology & Oncology Physic…0.1%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

James Chang, M.D.'s 2023 MIPS final score plotted against the Hematology & Oncology Physician national average

High performer (top quartile)
MIPS Final Score
91.6/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%91.6%
MIPS final score (Hematology & Oncology Physician) - 91.6/100 vs national avg 83.5
How MIPS and board certification work

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).

Practice Address

7879 ROSEDALE HWY
Bakersfield, CA 93308
(661) 316-8888

Provider Details

NPI 1154422004
Specialty Hematology & Oncology Physician
Credentials M.D.
Gender Male
NPI Issued 09/25/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

91.5901
Final Score
Measured-score avg: 83.5
85.0511
Quality
96.8817
Promoting Interoperability

Reporting: Alternative Payment Model

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 James Chang, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$76

Largest payer

E.R. Squibb & Sons, L.L.C.

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 James Chang, M.D.. To verify James Chang, M.D.'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.

368
Total Claims
$1.8M
Total Drug Cost
66
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
518
Total Day Supply
14,129
Generic Drug Cost
$213K

Patient Demographics

Average Patient Age
75.5 years
Avg HCC Risk Score
2.12
Gender Split
58% female / 42% male

Top Prescribed Drugs (Medicare Part D)

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

What James Chang, M.D. 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
Revlimid
Lenalidomide
48
Anastrozole
 28
Dexamethasone
 24
Acyclovir
 22
Hydroxyurea
 21
Jakafi
Ruxolitinib Phosphate
16
Levothyroxine Sodium
 14
Letrozole
 11
Prednisone
 11

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

More Hematology & Oncology Physician in CA → All providers in California → Compare specialties →

Hematology & Oncology Physician Overview

How James Chang, M.D. fits within the Hematology & Oncology Physician landscape nationally.

11,232
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider

James Chang, M.D.'s 368 claims are below the specialty average of 847.

Nationwide Hematology & Oncology Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Chang, both outside California so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (91.6 here).

Chau Dang 91.6 NY Jasmeet Singh 91.6 NY Alice Zervoudakis 91.6 NY Andrew Schneider 91.6 FL

Same NPPES enumeration year (2006)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Gauri Bhide Stoneham, MA Orli Etingin New York, NY Richard Shildt Goodyear, AZ Steven Stein Philadelphia, PA

Nearby Hematology & Oncology Physician Providers in California

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

One of 1,293 Hematology & Oncology Physician providers enrolled in California, 5 are shown here.

Dr. Mark Abate
M.D.
Santa Barbara, CA
Dr. Iman Abdalla
MD
Los Angeles, CA
Dr. Nihal Abdulla
MD
Los Alamitos, CA
Dr. Oyewale Abidoye
M.D.
La Jolla, CA
Dr. Mohamad Adada
M.D., PHD
Roseville, CA

Compare Hematology & Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is James Chang, M.D.'s specialty? ▼
James Chang, M.D. specializes in Hematology & Oncology Physician and practices in Bakersfield, California. Credentials: M.D..
How much does James Chang, M.D. prescribe under Medicare Part D? ▼
In 2023, James Chang, M.D. wrote 368 Medicare Part D claims totaling $1.8M in drug costs for 66 beneficiaries.
What is James Chang, M.D.'s Medicare quality score? ▼
James Chang, M.D. has a CMS MIPS Final Score of 91.6/100 (Quality: 85.1). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is James Chang, M.D. located? ▼
James Chang, M.D. is located at 7879 ROSEDALE HWY, Bakersfield, CA, 93308. Phone: (661) 316-8888.
What is James Chang, M.D.'s NPI number? ▼
James Chang, M.D.'s National Provider Identifier (NPI) is 1154422004, issued on 09/25/2006.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,232 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does James Chang, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, James Chang, M.D.'s most frequently prescribed drugs include Revlimid, Anastrozole, Dexamethasone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Chang, M.D. accept Medicare? ▼
James Chang, M.D. appears in CMS Medicare data with 368 Part D claims and 66 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Chang, M.D.'s credentials? ▼
James Chang, M.D.'s NPI is 1154422004 with credentials M.D.. 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

View source datasets and methodology notes
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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.