JANNA LYNN WILLIAMS MD
NPI 1033552740
Internal Medicine - Infectious Disease in Grand Rapids, MI
About Janna Lynn Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JANNA LYNN WILLIAMS MD (NPI 1033552740) is an individual infectious disease provider in Grand Rapids, Michigan, licensed in Michigan (4301509242) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses
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
Janna Lynn Williams 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 Janna Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Grand Rapids, MI 49503
- Reassigned Medicare billing, Michigan enrollment
- 2,446 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 6
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.
Spectrum Health
Acute Care Hospitals · Grand Rapids, MICorewell Health Gerber Hospital
Critical Access Hospitals · Fremont, MICorewell Health Pennock Hospital
Critical Access Hospitals · Hastings, MIPhysician 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 16
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 Janna Williams's NPI number?
The NPI number for Janna Williams is 1033552740. It was assigned to this individual provider in the NPPES registry on April 11, 2013.
Where is Janna Williams located?
Janna Williams practices at 230 Michigan St NE Ste 230, Grand Rapids, MI 49503. The listed phone number is (616) 774-2822.
What is Janna Williams's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Janna Williams enrolled in Medicare?
Yes. Janna Williams 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 Janna Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Janna Williams reassigns Medicare benefits to Spectrum Health Primary Care Partners (Grand Rapids, MI). 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 Janna Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Janna Williams 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 1 other insurer list Janna Williams 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.
Is Janna Williams affiliated with any hospitals?
According to CMS data, Janna Williams is affiliated with Spectrum Health, Corewell Health Gerber Hospital and Corewell Health Pennock Hospital.
When was this NPI record last updated?
The NPPES record for Janna Williams was last updated on September 6, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Janna Lynn Williams, MD · NPI 1033552740
Infectious Disease physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since April 11, 2013.
## Identity
- **NPI:** 1033552740 (Entity type: Individual)
- **Enumerated:** April 11, 2013
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 4301509242 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 230 MICHIGAN ST NE STE 230, Grand Rapids, MI 49503-2550
- **Phone:** (616) 774-2822
## 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:** Spectrum Health Primary Care Partners (NPI 1689499667, Grand Rapids, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** September 6, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1033552740) · Data from the CMS NPPES public registry.