NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1033292966 MD
Verify on CMS → Chung Owyang, MD
Internal Medicine Physician in Ann Arbor, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 in Internal Medicine 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
146
Medicare Part D claims · 35 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
77%
generic claims · 23% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
79.3/100
▼ 4 pts below national avg 83.1 · Above neutral
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
Chung Owyang, MD reported a CMS MIPS final score of 79.3/100 - below the 83.1 national average - and filed 146 Medicare Part D claims in 2023.
- 79.3/100
- MIPS score · -4 vs avg
- 146
- Part D claims, 2023
- 77%
- 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.
Chung Owyang, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
79 30th percentile higher than 30% 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 Chung Owyang, MD sits
This provider among internal medicine physician peers
Across the 36,260 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Chung Owyang, MD writes more Part D claims than 18% of them and scores higher on MIPS quality than 30% - placing this provider in the lower-volume, lower-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 internal medicine physician peer from a representative sample of 60; the gold marker is Chung Owyang, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Chung Owyang, MD 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 Chung Owyang, MD?
Near national averagePrimary specialty
Internal Medicine Physician
Medicare Part D claims
146 95% vs specialty avg
MIPS final score
79.3/100 3.8 pts vs avg
Specialty distribution in Michigan
How Internal Medicine Physician compares to other specialties among Michigan providers
Medicare quality performance, MIPS
Chung Owyang, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 79.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 79.3/100 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).
Chung Owyang, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 1500 EAST MEDICAL CENTER DR, Ann Arbor, MI, 48109, with a listed phone of (734) 647-5944. NPI 1033292966 was issued on 10/23/2006.
Medicare Part D records for calendar year 2023 show 146 prescription claims written by this provider, covering 35 Medicare beneficiaries and totaling roughly $59K in drug spend, split 23% brand-name and 77% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 79.3/100 for the 2023 performance year (Quality 68.4, Cost 62.7), compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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 | 1033292966 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/23/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
79.31
Final Score
Avg: 83.1
68.3808
Quality
62.6526
Cost
100
Promoting Interoperability
Reporting: Group practice
License & disciplinary context - Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 - they are NOT specific to Chung Owyang, MD. To verify Chung Owyang, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Chung Owyang, MD - brand share 23.0%
Internal Medicine Physician average
23% brand-name claims vs 77% generic, on 146 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.
146
Total Claims
$59K
Total Drug Cost
35
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 311
- Total Day Supply
- 9,008
- Brand vs Generic
- 23% brand / 77% generic
- Brand Drug Cost
- $43K
- Generic Drug Cost
- $16K
Patient Demographics
- Average Patient Age
- 65.3 years
- Avg HCC Risk Score
- 1.88
- Age Distribution
- <65: 13, 65-74: 14, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Chung Owyang, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Omeprazole
Omeprazole
16 claims
- Pyridostigmine Bro…
Pyridostigmine Bromide
15 claims
- Creon
Creon
14 claims
- Pantoprazole Sodium
Pantoprazole Sodium
12 claims
| Drug | Claims |
|---|---|
| Omeprazole | 16 |
| Pyridostigmine Bromide | 15 |
| Creon Lipase/Protease/Amylase | 14 |
| Pantoprazole Sodium | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Chung Owyang, MD fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Chung Owyang, MD's 146 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Owyang.
Dr. Keith Aaronson
MD
Ann Arbor, MI
Dr. Tomas Abalo
M.D.
Iron Mountain, MI
Dr. Ali Abbas
M.D.
Pontiac, MI
Dr. Hawazin Abbas
MD
Auburn Hills, MI
Dr. Imran Abbasi
D.O.
Warren, MI
Compare Internal Medicine 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 Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Michigan
Frequently Asked Questions
What is Chung Owyang, MD's specialty? ▼
Chung Owyang, MD specializes in Internal Medicine Physician and practices in Ann Arbor, Michigan. Credentials: MD.
How much does Chung Owyang, MD prescribe under Medicare Part D? ▼
In 2023, Chung Owyang, MD wrote 146 Medicare Part D claims totaling $59K in drug costs for 35 beneficiaries.
What is Chung Owyang, MD's Medicare quality score? ▼
Chung Owyang, MD has a CMS MIPS Final Score of 79.3/100 (Quality: 68.4, Cost: 62.7). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Chung Owyang, MD located? ▼
Chung Owyang, MD is located at 1500 EAST MEDICAL CENTER DR, Ann Arbor, MI, 48109. Phone: (734) 647-5944.
What is Chung Owyang, MD's NPI number? ▼
Chung Owyang, MD's National Provider Identifier (NPI) is 1033292966, issued on 10/23/2006.
Does Chung Owyang, MD prescribe more brand-name or generic drugs? ▼
Chung Owyang, MD's prescribing is 23% brand-name and 77% generic drugs by claim count, with $43K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Chung Owyang, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Chung Owyang, MD's most frequently prescribed drugs include Omeprazole, Pyridostigmine Bromide, Creon. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Chung Owyang, MD accept Medicare? ▼
Chung Owyang, MD appears in CMS Medicare data with 146 Part D claims and 35 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chung Owyang, MD's credentials? ▼
Chung Owyang, MD's NPI is 1033292966 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.