DR. JOHN MORITZ WIEMANN IV MD
NPI 1730228768
Orthopaedic Surgery in Hollister, CA
About Dr. John Moritz Wiemann Iv Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN MORITZ WIEMANN IV MD (NPI 1730228768) is an individual orthopaedic surgery provider in Hollister, California, licensed in California (A140151) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (2006).
NPPES Registry Identity
Specialties & Licenses 2
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 Moritz Wiemann Iv 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 Wiemann reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hollister, CA 95023
- Reassigned Medicare billing, California enrollment
- 73 clinicians in this Medicare group
Fresno, CA 93711
- Reassigned Medicare billing, California enrollment
- 508 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 95023 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Wiemann's NPI number?
The NPI number for John Wiemann is 1730228768. It was assigned to this individual provider in the NPPES registry on February 6, 2007.
Where is John Wiemann located?
John Wiemann practices at 930 Sunnyslope Rd Ste C4, Hollister, CA 95023. The listed phone number is (831) 636-7950.
What is John Wiemann's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is John Wiemann enrolled in Medicare?
Yes. John Wiemann 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 Wiemann's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Wiemann reassigns Medicare benefits to 2 organizations: Hazel Hawkins Memorial Hospital (Hollister, CA) and Community Foundation Medical Group (Fresno, CA). 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 Wiemann's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Wiemann was last updated on April 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 Moritz Wiemann IV, MD · NPI 1730228768
Orthopaedic Surgery physician in Hollister, California. Individual provider, active in the CMS NPPES registry since February 6, 2007.
## Identity
- **NPI:** 1730228768 (Entity type: Individual)
- **Enumerated:** February 6, 2007
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** A140151 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 930 SUNNYSLOPE RD STE C4, Hollister, CA 95023-5617
- **Phone:** (831) 636-7950
## 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): Hazel Hawkins Memorial Hospital (NPI 1275578817, Hollister, CA); Community Foundation Medical Group (NPI 1003329491, Fresno, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 2006
## Record status
- **NPPES last updated:** April 30, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1730228768) · Data from the CMS NPPES public registry.