John Alden Weeks, M.D.
Family Medicine Physician · Clearlake, CA
John Alden Weeks, M.D. is a family medicine physician with a practice address in Clearlake, California, and NPI 1962473074, issued on Jan 27, 2006. Check the license (California G38230, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Alden Weeks
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G38230 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15230 Lakeshore Dr, Clearlake, CA 95422
- Phone
- (707) 994-7377
- Enumerated
- Jan 27, 2006
- Record last updated
- Mar 18, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (707) 994-9456
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 15230 Lakeshore Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marisol AguilarCommunity Health Worker1699411603
- Veronica ArroyoCommunity Health Worker1730710617
- Pari Azari, M.D.Interventional Pain Medicine Physician1942442132
- Arthur Bikangaga, MDSurgery Physician1952319030
- Jerylyn Bohlender, LCSWClinical Social Worker1750782488
- Daniel Boucher, MDFamily Medicine Physician1164115549
Verify John Alden Weeks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G38230Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% more Medicare Part D claims than the average family medicine physician in 2024
4,924 Medicare Part D claims for 218 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 197 claims were for opioids.
Most prescribed
- Atorvastatin Calcium360 claims
- Levothyroxine Sodium246 claims
- Losartan Potassium227 claims
- Amlodipine Besylate188 claims
- Metoprolol Succinate174 claims
- Metformin Hcl169 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 78.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
John Alden Weeks among 17,133 family medicine physician records in California
John Alden Weeks, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2015 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 family medicine physician records list a practice address in Clearlake
They are 9 of the 321 NPPES records with a practice address in Clearlake, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Clearlake → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Daniel Boucher, MDClearlake, CA 954221164115549
- Sonja Derose, MDClearlake, CA 954221558849661
- Jerry Douglas, MDClearlake, CA 954221285603621
- Mark Freeman, MDClearlake, CA 954221801898929
- Siqi Ma, DOClearlake, CA 954221659991933
- Gail Marquette, FNPClearlake, CA 954221205851656
- Susan Salmina, FNP-CClearlake, CA 954221700322690
- Wolfgang Schug, MDClearlake, CA 954221598798233
Common questions
What is John Alden Weeks, M.D.'s NPI number?
John Alden Weeks, M.D.'s National Provider Identifier (NPI) is 1962473074, issued on Jan 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Alden Weeks, M.D. located?
The NPPES record lists a practice address at 15230 Lakeshore Dr, Clearlake, CA, 95422. Phone: (707) 994-7377. Providers update this record themselves, so call before visiting.
How can I verify John Alden Weeks, M.D.'s license?
NPPES lists California license number G38230, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Alden Weeks, M.D. prescribe under Medicare Part D?
In 2024, John Alden Weeks, M.D. had 4,924 Medicare Part D claims for 218 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is John Alden Weeks, M.D.'s MIPS final score?
The 2023 MIPS final score is 78.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.