Randall S. Williams, MD
General Practice Physician · Chico, CA
Randall S. Williams, MD is a general practice physician with a practice address in Chico, California, and NPI 1245261114, issued on Jul 6, 2006. Check the license (California G068885, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Randall S. Williams
- Credential
- MD
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- G068885 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1040 Mangrove Ave, Chico, CA 95926
- Phone
- (530) 345-0064
- Enumerated
- Jul 6, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (530) 345-0080
- Medicaid ID
- 00G688850 CA
- Medicare enrollment
- Enrolled (PECOS I20080710000694); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 1986
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 1,956 in California → Look up another NPI →
Also registered at 1040 Mangrove Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Avilla, D.O.Family Medicine Physician1346687225
- Miranda Bedene, FNP-CFamily Nurse Practitioner1730033762
- Dewayne Caviness, MDGeneral Practice Physician1912938887
- Gregory Davis, M.D.Gynecology Physician1497752877
- Matthew Haselton, FNP-CPrimary Care Nurse Practitioner1558096453
- Kurt Johnson, M.D., INC.General Practice Physician1407881741
Verify Randall S. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G068885Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6.6 times the Medicare Part D claims of the average general practice physician in 2024
19,906 Medicare Part D claims for 1,449 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 965 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium1,563 claims
- Levothyroxine Sodium756 claims
- Amlodipine Besylate728 claims
- Atorvastatin Calcium689 claims
- Olmesartan Medoxomil634 claims
- Mounjaro585 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.
Industry payments in 2024: $4,049.69
227 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 4,259 providers of this specialty with any payment received $1,273.40 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mangrove Medical GroupChico, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Randall S. Williams among 1,956 general practice physician records in California
Randall S. Williams, MD is one of 1,956 general practice physician records with a practice address in California. 48% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 66% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileYes · 27% of these records are
- Graduated1986 · median 1994 among the 520 with a school on file
- Record last updated2007 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in California
There are 1,956 general practice physician records in California.
All 1,956 in California → Every provider in Chico → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Dewayne Caviness, MDChico, CA 959261912938887
- Randall Caviness, M.D.Chico, CA 959261235140278
- Kurt Johnson, M.D., INC.Chico, CA 959261407881741
- Ronald Johnson, M.D.Chico, CA 959261578603122
- Sergio Riffel, M.D.Chico, CA 959261619018066
- Mark Schwab, MDChico, CA 959261134137722
- Amitabh Singh, D.OChico, CA 959261053843540
- Bradley Smith, M.D.Chico, CA 959261932248036
Common questions
What is Randall S. Williams, MD's NPI number?
Randall S. Williams, MD's National Provider Identifier (NPI) is 1245261114, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Randall S. Williams, MD located?
The NPPES record lists a practice address at 1040 Mangrove Ave, Chico, CA, 95926. Phone: (530) 345-0064. Providers update this record themselves, so call before visiting.
How can I verify Randall S. Williams, MD's license?
NPPES lists California license number G068885, 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 Randall S. Williams, MD prescribe under Medicare Part D?
In 2024, Randall S. Williams, MD had 19,906 Medicare Part D claims for 1,449 beneficiaries; the average among general practice physician prescribers was 3,030. Part D covers Medicare prescriptions only.
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.