OAK STREET HEALTH PHYSICIANS GROUP OF MISSISSIPPI, LLC
NPI 1235754995
Family Medicine in Raymond, NH
About Oak Street Health Physicians Group Of Mississippi, Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
OAK STREET HEALTH PHYSICIANS GROUP OF MISSISSIPPI, LLC (NPI 1235754995) is a healthcare organization registered as a family medicine in Raymond, New Hampshire and active in the NPI registry since June 2020. The organization maintains a secondary practice location in Nashua and lists Mary E Lyster, Physician, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Oak Street Health Physicians Group Of Mississippi, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
25Medicare enrollment records show 25 clinicians reassign Medicare billing to Oak Street Health Physicians Group Of Mississippi, LLC, which bills Medicare for the services they deliver. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 4
Nearest to this location (20)
See all 25Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Oak Street Health Physicians Group Of Mississippi, LLC's NPI number?
The NPI number for Oak Street Health Physicians Group Of Mississippi, LLC is 1235754995. It was assigned to this organization in the NPPES registry on June 9, 2020.
Where is Oak Street Health Physicians Group Of Mississippi, LLC located?
Oak Street Health Physicians Group Of Mississippi, LLC is located at 128 Route 27, Raymond, NH 03077. The listed phone number is (603) 895-3351.
What is Oak Street Health Physicians Group Of Mississippi, LLC's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Oak Street Health Physicians Group Of Mississippi, LLC enrolled in Medicare?
Yes. Oak Street Health Physicians Group Of Mississippi, LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Oak Street Health Physicians Group Of Mississippi, LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 25 clinicians in 4 Medicare specialties reassign their Medicare billing to Oak Street Health Physicians Group Of Mississippi, LLC. A 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 the clinician's services. The largest specialties are Nurse Practitioner (12), Family Practice (7) and Internal Medicine (4). Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Oak Street Health Physicians Group Of Mississippi, LLC was last updated on July 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Oak Street Health Physicians Group Of Mississippi, Llc · NPI 1235754995
Family Medicine organization in Raymond, New Hampshire. Organization record, active in the CMS NPPES registry since June 9, 2020.
## Identity
- **NPI:** 1235754995 (Entity type: Organization)
- **Enumerated:** June 9, 2020
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **Organization subpart:** No
- **Authorized official:** Mary Lyster, PHYSICIAN
## Practice location
- **Address:** 128 ROUTE 27, Raymond, NH 03077-1230
- **Phone:** (603) 895-3351 · **Fax:** (312) 929-0373
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 25 clinicians in 4 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (12), Family Practice (7), Internal Medicine (4); [full list](https://npiprofile.com/npi/1235754995/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 30, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1235754995) · Data from the CMS NPPES public registry.