NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1346256377 MD
Verify on CMS → Henry Chang, MD
Hospitalist Physician in Harrisonburg, Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,825 in Hospitalist 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
173
Medicare Part D claims · 81 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
95.1/100
▲ 12 pts above national avg 83.1 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Henry Chang, MD reported a CMS MIPS final score of 95.1/100 - above the 83.1 national average - and filed 173 Medicare Part D claims in 2023.
- 95.1/100
- MIPS score · +12 vs avg
- 173
- Part D claims, 2023
- 87%
- 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.
Henry Chang, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
95 Top 21% higher than 79% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Henry Chang, MD sits
This provider among hospitalist physician peers
Across the 4,437 hospitalist physician providers who report both Medicare Part D prescribing and a MIPS quality score, Henry Chang, MD writes more Part D claims than 36% of them and scores higher on MIPS quality than 74% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one hospitalist physician peer from a representative sample of 60; the gold marker is Henry Chang, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Henry Chang, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Henry Chang, MD?
High performer (top quartile)Primary specialty
Hospitalist Physician
Medicare Part D claims
173 81% vs specialty avg
MIPS final score
95.1/100 12 pts vs avg
Specialty distribution in Virginia
How Hospitalist Physician compares to other specialties among Virginia providers
Medicare quality performance, MIPS
Henry Chang, MD's 2023 MIPS final score plotted against the Hospitalist Physician national average
- MIPS Final Score
- 95.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Hospitalist Physician) - 95.1/100 vs national avg 83.1
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).
Henry Chang, MD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD credentials at 2010 HEALTH CAMPUS DR, Harrisonburg, VA, 22801, with a listed phone of (540) 689-1110. NPI 1346256377 was issued on 07/31/2006.
Medicare Part D records for calendar year 2023 show 173 prescription claims written by this provider, covering 81 Medicare beneficiaries and totaling roughly $9K in drug spend, split 13% brand-name and 87% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 95.1/100 for the 2023 performance year (Quality 86.3), compared with the national average of 83.1.
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
Provider Details
| NPI | 1346256377 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/31/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
95.1126
Final Score
Avg: 83.1
86.3184
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Henry Chang, 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.
Rmh Medical Group LLC
Harrisonburg, VA
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
Henry Chang, MD - brand share 13.0%
Hospitalist Physician average
13% brand-name claims vs 87% generic, on 173 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.
173
Total Claims
$9K
Total Drug Cost
81
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 179
- Total Day Supply
- 3,391
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 50
Patient Demographics
- Average Patient Age
- 74.7 years
- Avg HCC Risk Score
- 2.69
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 13, 65-74: 24, 75-84: 27, 85+: 17
Hospitalist Physician Overview
How Henry Chang, MD fits within the Hospitalist Physician landscape nationally.
16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Henry Chang, MD's 173 claims are below the specialty average of 888.
Nearby Hospitalist Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Chang.
Dr. Ramy Abdelfattah
M.D.
Fredericksburg, VA
Dr. Abdallah Abdelrazeq
M.D
Charlottesville, VA
Dr. Mohammed Abdulghani
MD
Tappahannock, VA
Dr. Mohammad Abolhassani
M.D.
Norfolk, VA
Dr. Christopher Achilli
MD
Richmond, VA
Compare Hospitalist Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hospitalist Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Henry Chang, MD's specialty? ▼
Henry Chang, MD specializes in Hospitalist Physician and practices in Harrisonburg, Virginia. Credentials: MD.
How much does Henry Chang, MD prescribe under Medicare Part D? ▼
In 2023, Henry Chang, MD wrote 173 Medicare Part D claims totaling $9K in drug costs for 81 beneficiaries.
What is Henry Chang, MD's Medicare quality score? ▼
Henry Chang, MD has a CMS MIPS Final Score of 95.1/100 (Quality: 86.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Henry Chang, MD located? ▼
Henry Chang, MD is located at 2010 HEALTH CAMPUS DR, Harrisonburg, VA, 22801. Phone: (540) 689-1110.
What is Henry Chang, MD's NPI number? ▼
Henry Chang, MD's National Provider Identifier (NPI) is 1346256377, issued on 07/31/2006.
Does Henry Chang, MD prescribe more brand-name or generic drugs? ▼
Henry Chang, MD's prescribing is 13% brand-name and 87% generic drugs by claim count, with $7K in brand drug costs.
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.
Does Henry Chang, MD accept Medicare? ▼
Henry Chang, MD appears in CMS Medicare data with 173 Part D claims and 81 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Henry Chang, MD's credentials? ▼
Henry Chang, MD's NPI is 1346256377 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
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 PlainDoctor editorial team.