MICHAEL GRINN M.D
NPI 1376905935
Anesthesiology in Brooklyn, NY
About Michael Grinn M.d NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL GRINN M.D (NPI 1376905935) is an individual anesthesiology provider in Brooklyn, New York, licensed in Florida (ME157628) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS, is affiliated with Mount Sinai Medical Center Of Florida, Inc, and maintains a secondary practice location in Plantation.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Michael Grinn M.d 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 Reassignments
6Medicare enrollment records show Michael Grinn reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hackensack, NJ 07601
- Reassigned Medicare billing, New Jersey enrollment
- 781 clinicians in this Medicare group
Pleasant Prairie, WI 53158
- Reassigned Medicare billing, Wisconsin enrollment
- 210 clinicians in this Medicare group
Palm Coast, FL 32164
- Reassigned Medicare billing, Florida enrollment
- 1,973 clinicians in this Medicare group
Port St Lucie, FL 34952
- Reassigned Medicare billing, Florida enrollment
- 562 clinicians in this Medicare group
Bradenton, FL 34208
- Reassigned Medicare billing, Florida enrollment
- 1,887 clinicians in this Medicare group
Aventura, FL 33180
- Reassigned Medicare billing, Florida enrollment
- 435 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
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Sinai Medical Center Of Florida, Inc
Acute Care Hospitals · Miami Beach, FLHackensack University Medical Center
Acute Care Hospitals · Hackensack, NJOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BROOKLYN, NY 11219
BROOKLYN, NY 11219
BROOKLYN, NY 11219
BROOKLYN, NY 11219
BROOKLYN, NY 11219
BROOKLYN, NY 11219
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 Michael Grinn's NPI number?
The NPI number for Michael Grinn is 1376905935. It was assigned to this individual provider in the NPPES registry on March 23, 2016.
Where is Michael Grinn located?
Michael Grinn practices at 4802 10th Ave Maimonides Medical Center, Brooklyn, NY 11219. The listed phone number is (718) 283-8000.
What is Michael Grinn's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Michael Grinn enrolled in Medicare?
Yes. Michael Grinn 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 organizations bill Medicare for Michael Grinn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Grinn reassigns Medicare benefits to 6 organizations: New Jersey Healthcare Specialists PC (Hackensack, NJ), Vituity-Wisconsin Anesthesia Sc (Pleasant Prairie, WI), Sheridan Healthcorp Inc (Palm Coast, FL), Anesthesia Physician Solutions Of South Florida, LLC (Port St Lucie, FL), Anesthesia Dynamics LLC (Bradenton, FL) and 1 more organization, listed in the Medicare section above. Each 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 Michael Grinn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Michael Grinn affiliated with any hospitals?
According to CMS data, Michael Grinn is affiliated with Mount Sinai Medical Center Of Florida, Inc and Hackensack University Medical Center.
When was this NPI record last updated?
The NPPES record for Michael Grinn was last updated on May 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.
# Michael Grinn, M.D · NPI 1376905935
Anesthesiology physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since March 23, 2016.
## Identity
- **NPI:** 1376905935 (Entity type: Individual)
- **Enumerated:** March 23, 2016
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** ME157628 (Florida)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4802 10TH AVE, MAIMONIDES MEDICAL CENTER, Brooklyn, NY 11219-2916
- **Phone:** (718) 283-8000
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): New Jersey Healthcare Specialists PC (NPI 1174585780, Hackensack, NJ); Vituity-Wisconsin Anesthesia Sc (NPI 1821831975, Pleasant Prairie, WI); Sheridan Healthcorp Inc (NPI 1316519903, Palm Coast, FL); Anesthesia Physician Solutions Of South Florida, LLC (NPI 1437823507, Port St Lucie, FL); Anesthesia Dynamics LLC (NPI 1073001012, Bradenton, FL); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** May 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1376905935) · Data from the CMS NPPES public registry.