DANIEL JEFFREY SLACK MD
NPI 1023512068
Hospitalist in New York, NY
About Daniel Jeffrey Slack Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DANIEL JEFFREY SLACK MD (NPI 1023512068) is an individual hospitalist provider in New York, New York, licensed in New York (309235) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with Mount Sinai Hospital, and is a graduate of University Of Maryland School Of Medicine (2018).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Daniel Jeffrey Slack Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Daniel Slack reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- Also billed through NPI 1235490277 (New York)
- 769 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Sinai Hospital
Acute Care Hospitals · New York, NYMount Sinai St Luke's Roosevelt Hospital
Acute Care Hospitals · New York, NYMount Sinai Beth Israel
Acute Care Hospitals · New York, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10029 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW YORK, NY 10029
NEW YORK, NY 10029
NEW YORK, NY 10029
NEW YORK, NY 10029
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Daniel Slack's NPI number?
The NPI number for Daniel Slack is 1023512068. It was assigned to this individual provider in the NPPES registry on March 23, 2018.
Where is Daniel Slack located?
Daniel Slack practices at 1 Gustave L Levy Pl, New York, NY 10029. The listed phone number is (212) 241-1653.
What is Daniel Slack's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Daniel Slack enrolled in Medicare?
Yes. Daniel Slack is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Daniel Slack's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Daniel Slack reassigns Medicare benefits to Icahn School Of Medicine At Mount Sinai (New York, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Daniel Slack's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Daniel Slack affiliated with any hospitals?
According to CMS data, Daniel Slack is affiliated with Mount Sinai Hospital, Mount Sinai St Luke's Roosevelt Hospital and Mount Sinai Beth Israel.
When was this NPI record last updated?
The NPPES record for Daniel Slack was last updated on May 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Daniel Jeffrey Slack, MD · NPI 1023512068
Hospitalist physician in New York, New York. Individual provider, active in the CMS NPPES registry since March 23, 2018.
## Identity
- **NPI:** 1023512068 (Entity type: Individual)
- **Enumerated:** March 23, 2018
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 309235 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 GUSTAVE L LEVY PL, New York, NY 10029-6504
- **Phone:** (212) 241-1653 · **Fax:** (212) 289-6393
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Icahn School Of Medicine At Mount Sinai (NPI 1659639524, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Maryland School Of Medicine, class of 2018
## Record status
- **NPPES last updated:** May 12, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1023512068) · Data from the CMS NPPES public registry.