JOHN P. FREY MD
NPI 1851312540
Pediatrics in Monroe, WI
About John P. Frey Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN P. FREY MD (NPI 1851312540) is an individual pediatrics provider in Monroe, Wisconsin, licensed in Wisconsin (31048) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 12
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
John P. Frey Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Frey reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Monroe, WI 53566
- Reassigned Medicare billing, Wisconsin enrollment
- 376 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 53566 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 20
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 Frey's NPI number?
The NPI number for John Frey is 1851312540. It was assigned to this individual provider in the NPPES registry on July 21, 2006.
Where is John Frey located?
John Frey practices at 515 22nd Ave, Monroe, WI 53566. The listed phone number is (608) 324-2000.
What is John Frey's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is John Frey enrolled in Medicare?
Yes. John Frey is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Frey's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Frey reassigns Medicare benefits to The Monroe Clinic, Inc. (Monroe, WI). 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 John Frey's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Frey accept?
Health plans from Dean Health Plan and Quartz list John Frey 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 Frey was last updated on December 18, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# John P. Frey, MD · NPI 1851312540
Pediatrics physician in Monroe, Wisconsin. Individual provider, active in the CMS NPPES registry since July 21, 2006.
## Identity
- **NPI:** 1851312540 (Entity type: Individual)
- **Enumerated:** July 21, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 31048 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 515 22ND AVE, Monroe, WI 53566-1569
- **Phone:** (608) 324-2000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** The Monroe Clinic, Inc. (NPI 1386720548, Monroe, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 18, 2020
- **Other identifiers:** Other 1000256; Other 390004890; Other 390808509; and 9 more
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Source: [NPI Profile](https://npiprofile.com/npi/1851312540) · Data from the CMS NPPES public registry.