2026 NPPES data Emergency Medicine Physician NPI 1225018062 M.D.
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JAMES CHEN, M.D.

Emergency Medicine Physician in DARTMOUTH, Massachusetts. 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
1K
Medicare Part D claims · 776 beneficiaries · Emergency Medicine Physician avg: 352
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$130.17
8 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

JAMES CHEN, M.D. filed 1,473 Medicare Part D claims in 2023 as a Emergency Medicine Physician in DARTMOUTH, Massachusetts, prescribing 98% generic.

1K
Part D claims, 2023
98%
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.

JAMES CHEN, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

1,473 Top 20% higher than 80% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). This entry sits in this band. 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)

JAMES CHEN, M.D. 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 JAMES CHEN, M.D.?

Quality data not reported

NPI registry status

Active

Issued 01/18/2006

NPI 1225018062

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

1,473 318% vs specialty avg

2023 prescription claims

Specialty avg: 352

Specialty distribution in Massachusetts

How Emergency Medicine Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Emergency Medicine Physician share within Massachusetts

1. Emergency Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Emergency Medicine Physician share within Massachusetts

Specialty board-certification context

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

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

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

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

JAMES CHEN, M.D. appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding M.D. credentials at 531 FAUNCE CORNER RD, DARTMOUTH, MA, 02747, with a listed phone of (508) 996-3991. NPI 1225018062 was issued on 01/18/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHEN 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 1,473 prescription claims written by this provider, covering 776 Medicare beneficiaries and totaling roughly $16K in drug spend, split 2% brand-name and 98% generic by claim count, with an opioid prescribing rate of 1.9%. 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.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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

531 FAUNCE CORNER RD
DARTMOUTH, MA 02747

Provider Details

NPI 1225018062
Specialty Emergency Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 01/18/2006

Hospital and facility affiliations

Facilities where JAMES CHEN, M.D. 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.

LIFESPAN PHYSICIAN GROUP OF MASSACHUSETTS INC
DARTMOUTH, MA
STEWARD MEDICAL GROUP INC
NORTH DARTMOUTH, MA

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 JAMES CHEN, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$130

Largest payer

AstraZeneca Pharmaceuticals LP

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 — Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 — they are NOT specific to JAMES CHEN, M.D.. To verify JAMES CHEN, M.D.'s current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

JAMES CHEN, M.D. — brand share 2.0%
Specialty average (est.)

2% brand-name claims vs 98% generic, on 1,473 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.

1,473
Total Claims
$16K
Total Drug Cost
776
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,545
Total Day Supply
18,383
Brand vs Generic
2% brand / 98% generic
Brand Drug Cost
$4K
Generic Drug Cost
$12K
Opioid Claims
28 (1.9% rate)
Antibiotic Claims
536

Patient Demographics

Average Patient Age
72.5 years
Avg HCC Risk Score
1.19
Gender Split
58% female / 42% male
Age Distribution
<65: 118, 65-74: 301, 75-84: 283, 85+: 74

Top Prescribed Drugs (Medicare Part D)

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

What JAMES CHEN, 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
Prednisone
482
Tizanidine Hcl
93
Cefuroxime
Cefuroxime Axetil
88
Amoxicillin
78
Cephalexin
75
Doxycycline Hyclate
74
Azithromycin
65
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
62
Ciprofloxacin Hcl
37
Methylprednisolone
33

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

Emergency Medicine Physician Overview

How JAMES CHEN, M.D. fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

JAMES CHEN, M.D.'s 1,473 claims are above the specialty average of 352.

Nearby Emergency Medicine Physician Providers in Massachusetts

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

Compare Emergency Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JAMES CHEN, M.D.'s specialty?
JAMES CHEN, M.D. specializes in Emergency Medicine Physician and practices in DARTMOUTH, Massachusetts. Credentials: M.D..
How much does JAMES CHEN, M.D. prescribe under Medicare Part D?
In 2023, JAMES CHEN, M.D. wrote 1,473 Medicare Part D claims totaling $16K in drug costs for 776 beneficiaries.
Where is JAMES CHEN, M.D. located?
JAMES CHEN, M.D. is located at 531 FAUNCE CORNER RD, DARTMOUTH, MA, 02747. Phone: (508) 996-3991.
What is JAMES CHEN, M.D.'s NPI number?
JAMES CHEN, M.D.'s National Provider Identifier (NPI) is 1225018062, issued on 01/18/2006.
Does JAMES CHEN, M.D. prescribe more brand-name or generic drugs?
JAMES CHEN, M.D.'s prescribing is 2% brand-name and 98% generic drugs by claim count, with $4K in brand drug costs.
Does JAMES CHEN, M.D. prescribe opioids?
Yes, JAMES CHEN, M.D. had 28 opioid claims in 2023 with an opioid prescribing rate of 1.9%.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does JAMES CHEN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, JAMES CHEN, M.D.'s most frequently prescribed drugs include Prednisone, Tizanidine Hcl, Cefuroxime. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JAMES CHEN, M.D. accept Medicare?
JAMES CHEN, M.D. appears in CMS Medicare data with 1,473 Part D claims and 776 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JAMES CHEN, M.D.'s credentials?
JAMES CHEN, M.D.'s NPI is 1225018062 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

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