DR. JOHN ALDEN WEEKS M.D.
NPI 1962473074
Family Medicine in Clearlake, CA
About Dr. John Alden Weeks M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN ALDEN WEEKS M.D. (NPI 1962473074) is an individual family medicine provider in Clearlake, California, licensed in California (G38230) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.
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 (PECOS)
Dr. John Alden Weeks M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Weeks reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Clearlake, CA 95422
- Reassigned Medicare billing, California enrollment
- 678 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 95422 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 13
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Weeks's NPI number?
The NPI number for John Weeks is 1962473074. It was assigned to this individual provider in the NPPES registry on January 27, 2006.
Where is John Weeks located?
John Weeks practices at 15230 Lakeshore Dr Suite 101, Clearlake, CA 95422. The listed phone number is (707) 994-7377.
What is John Weeks's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is John Weeks enrolled in Medicare?
Yes. John Weeks is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Weeks's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Weeks reassigns Medicare benefits to Adventist Health Physicians Network (Clearlake, 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 John Weeks'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 Weeks was last updated on March 18, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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. John Alden Weeks, M.D. · NPI 1962473074
Family Medicine physician in Clearlake, California. Individual provider, active in the CMS NPPES registry since January 27, 2006.
## Identity
- **NPI:** 1962473074 (Entity type: Individual)
- **Enumerated:** January 27, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** G38230 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 15230 LAKESHORE DR, SUITE 101, Clearlake, CA 95422-8107
- **Phone:** (707) 994-7377 · **Fax:** (707) 994-9456
## 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:** Adventist Health Physicians Network (NPI 1992242614, Clearlake, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 18, 2015
- **Other identifiers:** Medicare PIN G382030 (CA); Medicare UPIN A47397
---
Source: [NPI Profile](https://npiprofile.com/npi/1962473074) · Data from the CMS NPPES public registry.