DR. DIEN MACH M.D.
NPI 1831141571
General Practice in Patton, CA
About Dr. Dien Mach M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DIEN MACH M.D. (NPI 1831141571) is an individual general practice provider in Patton, California, licensed in California (A62737) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Perelman School Of Med At The University Of Pennsylvania (1995).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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. Dien Mach M.d. 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 Dien Mach reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Norwalk, CA 90650
- Reassigned Medicare billing, California enrollment
- 755 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.
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.
PATTON, CA 92369
PATTON, CA 92369
PATTON, CA 92369
PATTON, CA 92369
PATTON, CA 92369
PATTON, CA 92369
PATTON, CA 92369
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 Dien Mach's NPI number?
The NPI number for Dien Mach is 1831141571. It was assigned to this individual provider in the NPPES registry on May 17, 2006.
Where is Dien Mach located?
Dien Mach practices at 3102 E. Highland Avenue Medical Staff Office, Patton, CA 92369. The listed phone number is (909) 425-7679.
What is Dien Mach's specialty?
The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.
Is Dien Mach enrolled in Medicare?
Yes. Dien Mach 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 Dien Mach's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dien Mach reassigns Medicare benefits to Department Of State Hospitals (Norwalk, CA). 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 Dien Mach'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 Dien Mach was last updated on August 13, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. Dien Mach, M.D. · NPI 1831141571
General Practice physician in Patton, California. Individual provider, active in the CMS NPPES registry since May 17, 2006.
## Identity
- **NPI:** 1831141571 (Entity type: Individual)
- **Enumerated:** May 17, 2006
- **Primary specialty:** General Practice · taxonomy 208D00000X
- **State license:** A62737 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3102 E. HIGHLAND AVENUE, MEDICAL STAFF OFFICE, Patton, CA 92369
- **Phone:** (909) 425-7679 · **Fax:** (909) 425-6635
## 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:** Department Of State Hospitals (NPI 1265406565, Norwalk, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 1995
## Record status
- **NPPES last updated:** August 13, 2013
- **Other identifiers:** Medicare ID-Type Unspecified 00A627371; Medicare UPIN H32330
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Source: [NPI Profile](https://npiprofile.com/npi/1831141571) · Data from the CMS NPPES public registry.