Dr Diane H Williams, DO - Medicare Gastroenterology in Portland, OR

Dr Diane H Williams, DO is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Portland, Oregon. She went to College Of Osteo Med Of The Pacific At Pomona and graduated in 1986 and has 38 years of diverse experience with area of expertise as Gastroenterology. She is a member of the group practice Oregon Clinic Pc and her current practice location is 9701 Sw Barnes Rd, Suite 300, Portland, Oregon. You can reach out to her office (for appointments etc.) via phone at (503) 297-8081.

Dr Diane H Williams is licensed to practice in Oregon (license number DO15375) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1619973351.

Contact Information

Dr Diane H Williams, DO
9701 Sw Barnes Rd, Suite 300,
Portland, OR 97225-6772
(503) 297-8081
(503) 292-6601



Physician's Profile

Full NameDr Diane H Williams
GenderFemale
SpecialityGastroenterology
Experience38 Years
Location9701 Sw Barnes Rd, Portland, Oregon
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Diane H Williams attended and graduated from College Of Osteo Med Of The Pacific At Pomona in 1986
  NPI Data:
  • NPI Number: 1619973351
  • Provider Enumeration Date: 06/27/2005
  • Last Update Date: 11/28/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 0648237677
  • Enrollment ID: I20080311000442

Medical Identifiers

Medical identifiers for Dr Diane H Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1619973351NPI-NPPES
196642MedicaidOR
8126294MedicaidWA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology DO15375 (Oregon)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Providence St Vincent Medical CenterPortland, ORHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Oregon Clinic Pc2860390408319

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Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Diane H Williams allows following entities to bill medicare on her behalf.
Entity NameOregon Clinic Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265417174
PECOS PAC ID: 2860390408
Enrollment ID: O20031222000096

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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. Dr Diane H 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
Dr Diane H Williams, DO
541 Ne 20th Ave Ste 225,
Portland, OR 97232-2895

Ph: (503) 963-2801
Dr Diane H Williams, DO
9701 Sw Barnes Rd, Suite 300,
Portland, OR 97225-6772

Ph: (503) 297-8081

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Internal Medicine Doctors in Portland, OR

Salona Shrestha, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 4805 Ne Glisan St, Portland, OR 97213
Phone: 503-215-2392    
Dr. Emmanuel Trungtoan Tavan, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 2800 N Vancouver Ave, Suite 230, Portland, OR 97227
Phone: 503-413-2901    
Ginevra Lois Liptan, M.D.
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 6400 Sw Canyon Ct, Ste 100, Portland, OR 97221
Phone: 503-477-9616    Fax: 503-477-9808
Donald Richard Sullivan, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 3181 Sw Sam Jackson Park Rd, Uhn67, Portland, OR 97239
Phone: 503-494-6949    
Dr. Victor Nguyen Pham, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 9205 Sw Barnes Rd, Portland, OR 97225
Phone: 503-216-2906    
Richa Uppal, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 800 Sw 13th Ave, Portland, OR 97205
Phone: 503-221-0161    Fax: 503-274-1697
Reem Hasan, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 3181 Sw Sam Jackson Park Rd, Ppv 350, Portland, OR 97239
Phone: 503-494-8562    

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