Marc K Siegel M D LLC
NPI 1609126408 · Internal Medicine Physician · New York, NY
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc K Siegel M D LLC is a Internal Medicine Physician organization in New York, NY (NPI 1609126408).
Provider details
- NPI number
- 1609126408
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Marc Siegel, Owner(212) 532-1214
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
13 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
- 2012-09-19
- Last updated
- 2024-12-16
- Certified
- 2024-12-16
Frequently asked questions
- What is Marc K Siegel M D LLC's NPI number?
- Marc K Siegel M D LLC's National Provider Identifier (NPI) is 1609126408, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Marc K Siegel M D LLC?
- Marc K Siegel M D LLC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marc K Siegel M D LLC located?
- Marc K Siegel M D LLC's practice location on file with NPPES is 251 E 33rd St Fl 3, New York, NY 10016-4804.
- What is Marc K Siegel M D LLC's phone number?
- The practice phone number listed in the NPPES registry for Marc K Siegel M D LLC is (212) 532-1214.
- Does Marc K Siegel M D LLC accept Medicare?
- Marc K Siegel M D LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Marc K Siegel M D LLC?
- The authorized official listed on Marc K Siegel M D LLC's NPPES record is Marc Siegel, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Marc K Siegel M D LLC's NPI active?
- Yes — Marc K Siegel M D LLC's NPI (1609126408) is active in the NPPES registry as of the last update on 2024-12-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.