WALTER M. MAIER M.D.
NPI 1376781765
Preventive Medicine - Preventive Medicine/Occupational Environmental Medicine in Lake Arrowhead, CA
About Walter M. Maier M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WALTER M. MAIER M.D. (NPI 1376781765) is a healthcare organization registered as a preventive medicine/occupational environmental medicine in Lake Arrowhead, California and active in the NPI registry since January 2009. The organization holds a CLIA Waiver certificate valid through May 9, 2027 and lists Walter Markus Maier, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 4
Other Names 1
Other Identifiers 2
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Walter M. Maier M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by January 31, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Walter M. Maier M.D., which bills Medicare for the services this clinician delivers.
Clinician (1)
Lake Arrowhead, CA 92352
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 05D0986240
W Maier Inc · Lake Arrowhead, CAFrequently 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 W Maier Inc's NPI number?
The NPI number for W Maier Inc is 1376781765. It was assigned to this organization in the NPPES registry on January 23, 2009. The provider is also known as Walter M. Maier M.D..
Where is W Maier Inc located?
W Maier Inc is located at 29099 Hospital Road Suite 112, Lake Arrowhead, CA 92352. The listed phone number is (909) 337-3661.
What is W Maier Inc's specialty?
The primary specialty registered for this NPI is Preventive Medicine, specializing in Preventive Medicine/Occupational Environmental Medicine, with taxonomy code 2083P0500X.
Is W Maier Inc enrolled in Medicare?
Yes. W Maier Inc is registered in the Medicare PECOS enrollment system.
When is W Maier Inc's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through W Maier Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Preventive Medicine) reassigns their Medicare billing to W Maier Inc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does W Maier Inc hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 05D0986240) is associated with this NPI, valid through May 9, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for W Maier Inc was last updated on June 26, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Walter M. Maier M.d. · NPI 1376781765
Preventive Medicine/Occupational Environmental Medicine organization in Lake Arrowhead, California. Organization record, active in the CMS NPPES registry since January 23, 2009.
## Identity
- **NPI:** 1376781765 (Entity type: Organization)
- **Enumerated:** January 23, 2009
- **Primary specialty:** Preventive Medicine - Preventive Medicine/Occupational Environmental Medicine · taxonomy 2083P0500X
- **Legal business name:** W Maier Inc
- **Organization subpart:** No
- **Authorized official:** Walter Maier, PRESIDENT
## Practice location
- **Address:** 29099 HOSPITAL ROAD, SUITE 112, Lake Arrowhead, CA 92352
- **Phone:** (909) 337-3661 · **Fax:** (909) 337-3570
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** January 31, 2027 (Non-DME Part B, California, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 1 clinician (Preventive Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 26, 2009
- **Other identifiers:** Medicare PIN BG519 (CA); Medicare UPIN G04002 (CA)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1376781765) · Data from the CMS NPPES public registry.