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John Chandler Workinger , NP

Nurse Practitioner - Family • Tualatin, OR

Active NPI 1851402895 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

19185 Sw 90th Ave
Tualatin, OR 970627558

Call 5038857300 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

19185 Sw 90th Ave

Tualatin, OR 970627558

Telephone 5038857300
Organization at the Same NPPES Address or Phone
Kaiser Foundation Health Plan Of The Northwest Facility NPI 1699714063

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Kaiser Foundation Health Plan Of The Northwest. See the list

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Graduation Year

2002

30-day fills

27 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$196 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Industry payments (Open Payments)

No Open Payments records are listed for this clinician for 2021–2025.

Guide: How to read an Open Payments record

Years since graduation

24 years (graduated 2002)

CMS Doctors and Clinicians data list 2002 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

NPI first issued

2006

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

John Workinger has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists John Workinger as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Tualatin and Oregon

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

Fewer Part D prescriptions than 90% of clinicians listed under Nurse Practitioner - Family in Tualatin, OR (2024, 12 clinicians with data). Median for this group: 467. Middle half: 170 to 1,058.

Fewer Part D prescriptions than 90% of clinicians listed under Nurse Practitioner - Family in Oregon (2024, 1,300 clinicians with data). Median for this group: 489. Middle half: 117 to 1,747.

Part D drug cost

A lower Part D drug cost than 90% of clinicians listed under Nurse Practitioner - Family in Tualatin, OR (2024, 12 clinicians with data). Median for this group: $22,122. Middle half: $3,252 to $50,868.

A lower Part D drug cost than 90% of clinicians listed under Nurse Practitioner - Family in Oregon (2024, 1,300 clinicians with data). Median for this group: $25,939. Middle half: $1,885 to $146,615.

18 active clinicians are listed under Nurse Practitioner - Family with a practice address in Tualatin, OR (2,424 in Oregon).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Tualatin

44.4% of these 18 clinicians have the CMS telehealth indicator.

77.8% of these 18 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Oxycodone Hcl Oxycodone Hcl 15 112 $106.51 13
Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen 12 76 $89.87 11

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Nurse Practitioner - Family Primary Specialty

NUCC Taxonomy Code: 363LF0000X

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Oregon Medical Board.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - NURSE PRACTITIONER

Medicare Enrollment ID

I20050119001119

Enrollment State Jurisdiction

OR

PECOS Control ID

9335198084

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Kaiser Foundation Health Plan Of The Northwest

10100 Se Sunnyside Rd, Clackamas, OR 970158970

Phone: 8008132000

Kaiser Foundation Health Plan Of The Northwest

10180 Se Sunnyside Rd, Clackamas, OR 970158970

Phone: 8008132000

Kaiser Foundation Health Plan Of The Northwest

3500 N Interstate Ave, Portland, OR 972271196

Phone: 8008132000

Kaiser Foundation Health Plan Of The Northwest

3550 N Interstate Ave, Portland, OR 972271196

Phone: 8008132000

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

6 listed
Dr. Alicia Ahn , MD

Internal Medicine

NPI 1811109283

Doctor of Medicine (M.D.)

NPI 1629414412

Doctor of Osteopathic Medicine (D.O.)

Dr. Louis Liu , MD

Family Medicine

NPI 1336259274

Doctor of Medicine (M.D.)

Dori Macdonald , PA

Physician Assistant - Medical

NPI 1568519684

Physician Assistant

Dr. Laurel Westly , MD

Family Medicine

NPI 1922194430

Doctor of Medicine (M.D.)

Dr. Xianghong Zhu , MD

Family Medicine

NPI 1275546640

Doctor of Medicine (M.D.)

Career & Practice History

NPI enumerated August 31, 2006.

No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to November 2026.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1851402895
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: August 31, 2006
Last Update: July 11, 2007
Sole Proprietor: No

Other Nurse Practitioner - Family Specialists in Tualatin

All Nurse Practitioner - Family Specialists in Tualatin

Mailing Address

19185 Sw 90th Ave

Tualatin, OR 970627558

Phone: 5038857300

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.