Michael Chen-Illamos, MD
NPI 1205274727 · Family Medicine Physician · Ossining, NY
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Chen-Illamos, MD is a Family Medicine Physician provider in Ossining, NY (NPI 1205274727).
Provider details
- NPI number
- 1205274727
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- LP02873 (RI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
13 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 132 | 49 |
| Amlodipine Besylate | 123 | 40 |
| Rosuvastatin Calcium | 70 | 23 |
| Losartan Potassium | 65 | 23 |
| Metformin Hclbrand: Metformin Hcl Er | 52 | 16 |
| Famotidine | 49 | 22 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$173 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-06-06
- Last updated
- 2017-01-30
Frequently asked questions
- What is Michael Chen-Illamos's NPI number?
- Michael Chen-Illamos's National Provider Identifier (NPI) is 1205274727, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Chen-Illamos's specialty?
- Michael Chen-Illamos is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Chen-Illamos located?
- Michael Chen-Illamos's practice location on file with NPPES is 165 Main St, Ossining, NY 10562-4702.
- What is Michael Chen-Illamos's phone number?
- The practice phone number listed in the NPPES registry for Michael Chen-Illamos is (914) 941-1263.
- Does Michael Chen-Illamos accept Medicare?
- Michael Chen-Illamos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Chen-Illamos's NPI active?
- Yes — Michael Chen-Illamos's NPI (1205274727) is active in the NPPES registry as of the last update on 2017-01-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.