2026 NPPES data Hospitalist Physician NPI 1578880845 MD, PHD
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JEFFREY CHEN, MD, PHD

Hospitalist Physician in BEND, Oregon. 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
2K
Medicare Part D claims · 203 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JEFFREY CHEN, MD, PHD filed 2,115 Medicare Part D claims in 2023 as a Hospitalist Physician in BEND, Oregon, prescribing 89% generic.

2K
Part D claims, 2023
89%
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.

JEFFREY CHEN, MD, PHD's Medicare Part D volume vs every U.S. prescriber

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

2,115 Top 15% higher than 85% 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%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

JEFFREY CHEN, MD, PHD 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).

What does the federal data show about JEFFREY CHEN, MD, PHD?

Quality data not reported

NPI registry status

Active

Issued 04/27/2010

NPI 1578880845

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

2,115 138% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in Oregon

How Hospitalist Physician compares to other specialties among Oregon providers

Oregon providers

Hospitalist Physician share within Oregon

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

Specialty board-certification context

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

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

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

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

JEFFREY CHEN, MD, PHD is a Hospitalist Physician provider practicing in BEND, Oregon, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD, PHD. NPI: 1578880845. 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.

JEFFREY CHEN, MD, PHD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD, PHD credentials at 2500 NE NEFF RD, BEND, OR, 97701, with a listed phone of (541) 706-5811. NPI 1578880845 was issued on 04/27/2010. 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 2,115 prescription claims written by this provider, covering 203 Medicare beneficiaries and totaling roughly $168K in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 5.3%. 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.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

2500 NE NEFF RD
BEND, OR 97701

Provider Details

NPI 1578880845
Specialty Hospitalist Physician
Credentials MD, PHD
Gender Male
NPI Issued 04/27/2010

Hospital and facility affiliations

Facilities where JEFFREY CHEN, MD, PHD 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.

ST CHARLES HEALTH SYSTEM INC
REDMOND, OR

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

JEFFREY CHEN, MD, PHD — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 2,115 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.

2,115
Total Claims
$168K
Total Drug Cost
203
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,731
Total Day Supply
106,886
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$136K
Generic Drug Cost
$32K
Opioid Claims
112 (5.3% rate)
Antibiotic Claims
62

Patient Demographics

Average Patient Age
72.8 years
Avg HCC Risk Score
1.77
Gender Split
49% female / 51% male
Age Distribution
<65: 30, 65-74: 85, 75-84: 62, 85+: 26

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
101
Levothyroxine Sodium
99
Losartan Potassium
73
Gabapentin
71
Metoprolol Succinate
67
Tamsulosin Hcl
59
Omeprazole
54
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
53
Lisinopril
52
Amlodipine Besylate
50

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

Hospitalist Physician Overview

How JEFFREY CHEN, MD, PHD fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

JEFFREY CHEN, MD, PHD's 2,115 claims are above the specialty average of 888.

Nearby Hospitalist Physician Providers in Oregon

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

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

Frequently Asked Questions

What is JEFFREY CHEN, MD, PHD's specialty?
JEFFREY CHEN, MD, PHD specializes in Hospitalist Physician and practices in BEND, Oregon. Credentials: MD, PHD.
How much does JEFFREY CHEN, MD, PHD prescribe under Medicare Part D?
In 2023, JEFFREY CHEN, MD, PHD wrote 2,115 Medicare Part D claims totaling $168K in drug costs for 203 beneficiaries.
Where is JEFFREY CHEN, MD, PHD located?
JEFFREY CHEN, MD, PHD is located at 2500 NE NEFF RD, BEND, OR, 97701. Phone: (541) 706-5811.
What is JEFFREY CHEN, MD, PHD's NPI number?
JEFFREY CHEN, MD, PHD's National Provider Identifier (NPI) is 1578880845, issued on 04/27/2010.
Does JEFFREY CHEN, MD, PHD prescribe more brand-name or generic drugs?
JEFFREY CHEN, MD, PHD's prescribing is 11% brand-name and 89% generic drugs by claim count, with $136K in brand drug costs.
Does JEFFREY CHEN, MD, PHD prescribe opioids?
Yes, JEFFREY CHEN, MD, PHD had 112 opioid claims in 2023 with an opioid prescribing rate of 5.3%.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does JEFFREY CHEN, MD, PHD prescribe most often?
Based on 2023 Medicare Part D data, JEFFREY CHEN, MD, PHD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JEFFREY CHEN, MD, PHD accept Medicare?
JEFFREY CHEN, MD, PHD appears in CMS Medicare data with 2,115 Part D claims and 203 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JEFFREY CHEN, MD, PHD's credentials?
JEFFREY CHEN, MD, PHD's NPI is 1578880845 with credentials MD, PHD. 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