DR. JOHN MICHAEL GUEST MD
NPI 1235796780
Ophthalmology in Saint Clair Shores, MI
About Dr. John Michael Guest Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN MICHAEL GUEST MD (NPI 1235796780) is an individual ophthalmology provider in Saint Clair Shores, Michigan, licensed in Michigan (4351044538) and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Wayne State University School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 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
Dr. John Michael Guest 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
2Medicare enrollment records show John Guest reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Clair Shores, MI 48080
- Reassigned Medicare billing, Michigan enrollment
- 2 clinicians in this Medicare group
St Clair Shores, MI 48080
- Reassigned Medicare billing, Michigan enrollment
- 8 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 14
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48080 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 John Guest's NPI number?
The NPI number for John Guest is 1235796780. It was assigned to this individual provider in the NPPES registry on May 21, 2019.
Where is John Guest located?
John Guest practices at 21931 E 9 Mile Rd, Saint Clair Shores, MI 48080. The listed phone number is (586) 210-2464.
What is John Guest's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is John Guest enrolled in Medicare?
Yes. John Guest 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 John Guest's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Guest reassigns Medicare benefits to 2 organizations: Mg Vision Partners PLLC (Saint Clair Shores, MI) and Richard C Mertz Jr MD PC (St Clair Shores, 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 John Guest's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Guest accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas and 8 other insurers list John Guest 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 John Guest was last updated on July 1, 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.
# Dr. John Michael Guest, MD · NPI 1235796780
Ophthalmology physician in Saint Clair Shores, Michigan. Individual provider, active in the CMS NPPES registry since May 21, 2019.
## Identity
- **NPI:** 1235796780 (Entity type: Individual)
- **Enumerated:** May 21, 2019
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 4351044538 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 21931 E 9 MILE RD, Saint Clair Shores, MI 48080-2906
- **Phone:** (586) 210-2464 · **Fax:** (586) 204-2473
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Mg Vision Partners PLLC (NPI 1164348603, Saint Clair Shores, MI); Richard C Mertz Jr MD PC (NPI 1467408914, St Clair Shores, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** July 1, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1235796780) · Data from the CMS NPPES public registry.