Marcus Lien, MD
NPI 1063439941 · Critical Care Medicine (Internal Medicine) Physician · Yorktown Heights, NY
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcus Lien, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Yorktown Heights, NY (NPI 1063439941).
Provider details
- NPI number
- 1063439941
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 306373 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-16
- Last updated
- 2020-09-16
- Certified
- 2020-09-16
Frequently asked questions
- What is Marcus Lien's NPI number?
- Marcus Lien's National Provider Identifier (NPI) is 1063439941, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Lien's specialty?
- Marcus Lien is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Marcus Lien located?
- Marcus Lien's practice location on file with NPPES is 2649 Strang Blvd Ste 304, Yorktown Heights, NY 10598-2938.
- What is Marcus Lien's phone number?
- The practice phone number listed in the NPPES registry for Marcus Lien is (914) 739-0087.
- Does Marcus Lien accept Medicare?
- Marcus Lien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcus Lien's NPI active?
- Yes — Marcus Lien's NPI (1063439941) is active in the NPPES registry as of the last update on 2020-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.