John Frey, MD
NPI 1851312540 · Pediatrics Physician · Monroe, WI
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Frey, MD is a Pediatrics Physician provider in Monroe, WI (NPI 1851312540).
Provider details
- NPI number
- 1851312540
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 31048 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-21
- Last updated
- 2020-12-18
- Certified
- 2020-12-18
Frequently asked questions
- What is John Frey's NPI number?
- John Frey's National Provider Identifier (NPI) is 1851312540, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Frey's specialty?
- John Frey is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is John Frey located?
- John Frey's practice location on file with NPPES is 515 22nd Ave, Monroe, WI 53566-1569.
- What is John Frey's phone number?
- The practice phone number listed in the NPPES registry for John Frey is (608) 324-2000.
- Does John Frey accept Medicare?
- John Frey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Frey's NPI active?
- Yes — John Frey's NPI (1851312540) is active in the NPPES registry as of the last update on 2020-12-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.