LORI JEAN DAY MD
NPI 1326258740
Obstetrics & Gynecology - Maternal & Fetal Medicine in Grand Rapids, MI
About Lori Jean Day Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LORI JEAN DAY MD (NPI 1326258740) is an individual maternal & fetal medicine provider in Grand Rapids, Michigan, licensed in Michigan (4301095680) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS and is a graduate of Michigan State University College Of Human Medicine (2003).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
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
Lori Jean Day 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 Reassignments
4Medicare enrollment records show Lori Day reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Grand Rapids, MI 49503
- Reassigned Medicare billing, Michigan enrollment
- 2,446 clinicians in this Medicare group
Ludington, MI 49431
- Reassigned Medicare billing, Michigan enrollment
- 168 clinicians in this Medicare group
Brighton, MI 48116
- Reassigned Medicare billing, Michigan enrollment
- 128 clinicians in this Medicare group
Escanaba, MI 49829
- Reassigned Medicare billing, Michigan enrollment
- 440 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49503 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 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRAND RAPIDS, MI 49503
GRAND RAPIDS, MI 49503
GRAND RAPIDS, MI 49503
GRAND RAPIDS, MI 49503
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 Lori Day's NPI number?
The NPI number for Lori Day is 1326258740. It was assigned to this individual provider in the NPPES registry on May 23, 2007.
Where is Lori Day located?
Lori Day practices at 25 Michigan St NE Ste 5200, Grand Rapids, MI 49503. The listed phone number is (616) 391-3681.
What is Lori Day's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.
Is Lori Day enrolled in Medicare?
Yes. Lori Day 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 Lori Day's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lori Day reassigns Medicare benefits to 4 organizations: Spectrum Health Primary Care Partners (Grand Rapids, MI), Memorial Medical Center Of West Michigan (Ludington, MI), Regents Of The University Of Michigan (Brighton, MI) and Dlp Marquette Physician Practices Inc (Escanaba, MI). 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 Lori Day's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lori Day accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 3 other insurers list Lori Day as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Lori Day was last updated on January 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.
# Lori Jean Day, MD · NPI 1326258740
Maternal & Fetal Medicine physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since May 23, 2007.
## Identity
- **NPI:** 1326258740 (Entity type: Individual)
- **Enumerated:** May 23, 2007
- **Primary specialty:** Obstetrics & Gynecology - Maternal & Fetal Medicine · taxonomy 207VM0101X
- **State license:** 4301095680 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 25 MICHIGAN ST NE STE 5200, Grand Rapids, MI 49503-2572
- **Phone:** (616) 391-3681
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Spectrum Health Primary Care Partners (NPI 1326599671, Grand Rapids, MI); Memorial Medical Center Of West Michigan (NPI 1144639360, Ludington, MI); Regents Of The University Of Michigan (NPI 1942235163, Brighton, MI); Dlp Marquette Physician Practices Inc (NPI 1538415021, Escanaba, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Human Medicine, class of 2003
## Record status
- **NPPES last updated:** January 16, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1326258740) · Data from the CMS NPPES public registry.