John P Williams, DO - Medicare Internal Medicine in Willits, CA

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John P Williams, DO is a medicare enrolled "Internal Medicine" physician in Willits, California. He went to University Of New England, College Of Osteo Medicine and graduated in 1989 and has 35 years of diverse experience with area of expertise as Internal Medicine. His current practice location is 1712 S Main St, Ste C, Willits, California. You can reach out to his office (for appointments etc.) via phone at (707) 459-5585.

John P Williams is licensed to practice in California (license number 20A6027) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1144220369.

Contact Information

John P Williams, DO
1712 S Main St, Ste C,
Willits, CA 95490-4400
(707) 459-5585
(707) 459-3548

Map and Direction




Physician's Profile

Full NameJohn P Williams
GenderMale
SpecialityInternal Medicine
Experience35 Years
Location1712 S Main St, Willits, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • John P Williams attended and graduated from University Of New England, College Of Osteo Medicine in 1989
  NPI Data:
  • NPI Number: 1144220369
  • Provider Enumeration Date: 07/29/2005
  • Last Update Date: 12/19/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 0941237382
  • Enrollment ID: I20050718000819

Medical Identifiers

Medical identifiers for John P Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1144220369NPI-NPPES
00AX60271MedicaidCA
020A60270OtherCABLUE SHIELD PROVIDER #
110228689OtherCARAILROAD MEDICARE
20A6027OtherCABLUE CROSS PROVIDER #

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 20A6027 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Adventist Health Home Care ServicesWillits, CAHome health agency
Adventist Health Howard MemorialWillits, CAHospital
Adventist Health Ukiah ValleyUkiah, CAHospital
St Joseph HospitalEureka, CAHospital
Adventist Health ClearlakeClearlake, CAHospital
Sutter Lakeside HospitalLakeport, CAHospital
Northbrook Healthcare CenterWillits, CANursing home
Granada Rehabilitation & Wellness Center, LpEureka, CANursing home
Fortuna Rehabilitation And Wellness Center, LpFortuna, CANursing home

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. John P Williams is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
John P Williams, DO
1712 S Main St, Ste C,
Willits, CA 95490-4400

Ph: (707) 459-5585		John P Williams, DO
1712 S Main St, Ste C,
Willits, CA 95490-4400

Ph: (707) 459-5585

Reviews and Comments


Internal Medicine Doctors in Willits, CA

Dr. Ronald Tholow Zimmerman, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 45 Hazel St, Willits, CA 95490
Phone: 707-456-9600    Fax: 707-462-9587
Claudia M Petruncio, DO
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3 Marcela Dr, Willits, CA 95490
Phone: 707-459-6115    Fax: 856-429-3794
Dr. Glenn Thomas Rogers, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 1245 S Main St, Willits, CA 95490
Phone: 707-459-6861    Fax: 707-456-3057
Dr. Bruce Robert Andich, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 88 Madrone St, Willits, CA 95490
Phone: 707-459-6115    

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.