NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1205274727 MD
Verify on CMS → Michael Chen-Illamos, MD
Family Medicine Physician in Ossining, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family 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
1K
Medicare Part D claims · 136 beneficiaries · Family Medicine Physician avg: 3K
Industry payments
$172.74
4 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Michael Chen-Illamos, MD filed 1,148 Medicare Part D claims in 2023 as a Family Medicine Physician in Ossining, New York.
- 1K
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥77th
- 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 Michael Chen-Illamos, MD
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 1205274727), first enumerated 06/06/2013.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,148 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
- Reported
Industry payment transparency
$172.74 in reported industry payments (4 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
New York statewide board action statistics are published annually — these figures describe aggregate state activity, not Michael Chen-Illamos, MD's individual license status. Verify directly with the state medical board.
Source: NYSBPMC annual report 2023
- 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 1205274727 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1205274727
- ENUM-MID 2013
- TAX-MEGA 148K Family Medicine
- RX-MID 1,148
- BOOK-MID 5,914 in New York
- PHOTO-ENUM Ryan Connor · 2013
Michael Chen-Illamos, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,148 ≥ 77th percentile 77% of 1,370,886 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 · 2023
✓
Board certification likely (heuristic, not verified)
Michael Chen-Illamos, MD 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 Michael Chen-Illamos, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
1,148 66% vs specialty avg
Specialty distribution in New York
How Family Medicine Physician compares to other specialties among New York 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 Family 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 | 1205274727 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/06/2013 |
Hospital and facility affiliations
Facilities where Michael Chen-Illamos, 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.
Open Door Family Medical Center Inc
Ossining, NY
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 Michael Chen-Illamos, MD. Source: openpaymentsdata.cms.gov.
Total received
$173
Largest payer
ViiV Healthcare Company
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 - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Michael Chen-Illamos, MD. To verify Michael Chen-Illamos, MD's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,148
Total Claims
$192K
Total Drug Cost
136
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,376
- Total Day Supply
- 68,782
- Generic Drug Cost
- $26K
- Antibiotic Claims
- 26
Patient Demographics
- Average Patient Age
- 68.4 years
- Avg HCC Risk Score
- 1.23
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 36, 65-74: 69, 75-84: 16, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Chen-Illamos, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
87 claims
- Omeprazole
Omeprazole
55 claims
- Amlodipine Besylate
Amlodipine Besylate
53 claims
- Losartan Potassium
Losartan Potassium
37 claims
- Diclofenac Sodium 33
Diclofenac Sodium
33 claims
- Lisinopril 33
Lisinopril
33 claims
- Alendronate Sodium 32
Alendronate Sodium
32 claims
- Hydrochlorothiazide 32
Hydrochlorothiazide
32 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 87 |
| Omeprazole | 55 |
| Amlodipine Besylate | 53 |
| Losartan Potassium | 37 |
| Diclofenac Sodium | 33 |
| Lisinopril | 33 |
| Alendronate Sodium | 32 |
| Hydrochlorothiazide | 32 |
| Metoprolol Succinate | 31 |
| Metformin Hcl | 29 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Michael Chen-Illamos, MD fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Michael Chen-Illamos, MD's 1,148 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Chen-Illamos, both outside New York so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Chen-Illamos.
One of 5,914 Family Medicine Physician providers enrolled in New York, 5 are shown here.
Dr. Stuart Aaronson
M.D.
New York, NY
Dr. Amarachi Abara
MD
Bronx, NY
Dr. Sharon Abara-Palaganas
MD
Brooklyn, NY
Dr. Mary Claire Abbot
MD
New York, NY
Dr. Heather Abdalla
FNP-C
Horseheads, NY
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Michael Chen-Illamos, MD's specialty? ▼
Michael Chen-Illamos, MD specializes in Family Medicine Physician and practices in Ossining, New York. Credentials: MD.
How much does Michael Chen-Illamos, MD prescribe under Medicare Part D? ▼
In 2023, Michael Chen-Illamos, MD wrote 1,148 Medicare Part D claims totaling $192K in drug costs for 136 beneficiaries.
Where is Michael Chen-Illamos, MD located? ▼
Michael Chen-Illamos, MD is located at 165 MAIN ST, Ossining, NY, 10562. Phone: (914) 941-1263.
What is Michael Chen-Illamos, MD's NPI number? ▼
Michael Chen-Illamos, MD's National Provider Identifier (NPI) is 1205274727, issued on 06/06/2013.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Michael Chen-Illamos, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Chen-Illamos, MD's most frequently prescribed drugs include Atorvastatin Calcium, Omeprazole, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Chen-Illamos, MD accept Medicare? ▼
Michael Chen-Illamos, MD appears in CMS Medicare data with 1,148 Part D claims and 136 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Chen-Illamos, MD's credentials? ▼
Michael Chen-Illamos, MD's NPI is 1205274727 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.
- 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
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 May 2026.