NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1043730807 DO
Verify on CMS → Muk Chun Yan, DO
Internal Medicine Physician in Aurora, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 174,792 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
508
Medicare Part D claims · 205 beneficiaries · Internal Medicine Physician avg: 3K
What the federal data shows
Muk Chun Yan, DO filed 508 Medicare Part D claims in 2024 as an Internal Medicine Physician in Aurora, Colorado.
- 508
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥65th
- pct by Part D claim volume (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.
Federal trust snapshot
What official records show about Muk Chun Yan, DO
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1043730807), first enumerated 06/22/2017.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 508 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1043730807 · Internal Medicine Physician
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1043730807
- ENUM-RECENT 2017
- TAX-MEGA 175K Internal Medicine
- RX-LIGHT 508
- BOOK-LIGHT 2,683 in Colorado
- PHOTO-ENUM Sanjay Timilsina, MD · 2017
Muk Chun Yan, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
508 ≥ 65th percentile 65% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Muk Chun Yan, DO 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 Muk Chun Yan, DO?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
508 82% vs specialty avg
Specialty distribution in Colorado
How Internal Medicine Physician compares to other specialties among Colorado providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Internal Medicine Physician. Verify directly:
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
Provider Details
| NPI | 1043730807 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 06/22/2017 |
Hospital and facility affiliations
Facilities where Muk Chun Yan, DO 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.
Colorado Permanente Medical Group PC
Aurora, CO
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
508
Total Claims
$24K
Total Drug Cost
205
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 700
- Total Day Supply
- 15,672
- Generic Drug Cost
- $5K
- Opioid Claims
- 22 (4.3% rate)
- Antibiotic Claims
- 88
Patient Demographics
- Average Patient Age
- 76.9 years
- Avg HCC Risk Score
- 1.63
- Gender Split
- 61% female / 39% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Muk Chun Yan, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
27 claims
- Cefuroxime
Cefuroxime
26 claims
- Lidocaine
Lidocaine
24 claims
- Prednisone
Prednisone
24 claims
- Pradaxa
Pradaxa
20 claims
- Azithromycin
Azithromycin
19 claims
- Pantoprazole Sodium
Pantoprazole Sodium
17 claims
- Gabapentin
Gabapentin
16 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 27 |
| Cefuroxime Cefuroxime Axetil | 26 |
| Lidocaine | 24 |
| Prednisone | 24 |
| Pradaxa Dabigatran Etexilate Mesylate | 20 |
| Azithromycin | 19 |
| Pantoprazole Sodium | 17 |
| Gabapentin | 16 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 14 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 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 Muk Chun Yan, DO fits within the Internal Medicine Physician landscape nationally.
174,792
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,785
Avg Claims per Provider
Muk Chun Yan, DO's 508 claims are below the specialty average of 2,785.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Yan, both outside Colorado so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2017)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Yan.
One of 2,683 Internal Medicine Physician providers enrolled in Colorado, 5 are shown here.
Dr. Emily Aaron
MD
Denver, CO
Dr. Cynthia Abacan
MD
Pueblo, CO
David Abbey
MS MD
Fort Collins, CO
Dr. Ahmed Abdulrahman
MD
Pueblo, CO
Dr. Victor Abela
D.O.
Denver, CO
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Muk Chun Yan, DO's specialty? ▼
Muk Chun Yan, DO specializes in Internal Medicine Physician and practices in Aurora, Colorado. Credentials: DO.
How much does Muk Chun Yan, DO prescribe under Medicare Part D? ▼
In 2024, Muk Chun Yan, DO wrote 508 Medicare Part D claims totaling $24K in drug costs for 205 beneficiaries.
Where is Muk Chun Yan, DO located? ▼
Muk Chun Yan, DO is located at 1501 S POTOMAC ST, Aurora, CO, 80012. Phone: (303) 338-4545.
What is Muk Chun Yan, DO's NPI number? ▼
Muk Chun Yan, DO's National Provider Identifier (NPI) is 1043730807, issued on 06/22/2017.
Does Muk Chun Yan, DO prescribe opioids? ▼
Yes, Muk Chun Yan, DO had 22 opioid claims in 2024 with an opioid prescribing rate of 4.3%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 174,792 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,785 Medicare Part D claims per year.
What drugs does Muk Chun Yan, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Muk Chun Yan, DO's most frequently prescribed drugs include Atorvastatin Calcium, Cefuroxime, Lidocaine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Muk Chun Yan, DO accept Medicare? ▼
Muk Chun Yan, DO appears in CMS Medicare data with 508 Part D claims and 205 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Muk Chun Yan, DO's credentials? ▼
Muk Chun Yan, DO's NPI is 1043730807 with credentials DO. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.