John Chandler Workinger, NP
Family Nurse Practitioner · Tualatin, OR
John Chandler Workinger, NP is a family nurse practitioner with a practice address in Tualatin, Oregon, and NPI 1851402895, issued on Aug 31, 2006. Check the license with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Chandler Workinger
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- Practice location
- 19185 SW 90TH Ave, Tualatin, OR 97062
- Phone
- (503) 885-7300
- Enumerated
- Aug 31, 2006
- Record last updated
- Jul 11, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050119001119); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,384 in Oregon → Look up another NPI →
Also registered at 19185 SW 90TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Chandler Workinger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family nurse practitioner in 2024
50 Medicare Part D claims for 41 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 29 claims were for opioids.
Most prescribed
- Oxycodone Hcl15 claims
- Hydrocodone-Acetaminophen12 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.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The NorthwestClackamas, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Chandler Workinger among 2,384 family nurse practitioner records in Oregon
John Chandler Workinger, NP is one of 2,384 family nurse practitioner records with a practice address in Oregon. 73% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 80% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2002 · median 2017 among the 1,390 with a school on file
- Record last updated2007 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 family nurse practitioner records list a practice address in Tualatin
They are 18 of the 863 NPPES records with a practice address in Tualatin, and 2,384 family nurse practitioner records in Oregon.
All 2,384 in Oregon → Every provider in Tualatin → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Margaret Baker, FNPTualatin, OR 970621356634661
- Adam Berens, MSN-FNPTualatin, OR 970621386253276
- Debra Clement, RN, FNP, ARNPTualatin, OR 970621689990368
- Melissa Davis, MSN, FNP-CTualatin, OR 970621437636065
- Diane Harper, FNPTualatin, OR 970621154752723
- Nicole Ingram, FNPTualatin, OR 970621154392223
- Karen McClish, MSN, FNPTualatin, OR 970621851364350
- Debora Mitchell, APRN, FNP-CTualatin, OR 970621417510314
Common questions
What is John Chandler Workinger, NP's NPI number?
John Chandler Workinger, NP's National Provider Identifier (NPI) is 1851402895, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Chandler Workinger, NP located?
The NPPES record lists a practice address at 19185 SW 90TH Ave, Tualatin, OR, 97062. Phone: (503) 885-7300. Providers update this record themselves, so call before visiting.
How can I verify John Chandler Workinger, NP's license?
Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does John Chandler Workinger, NP prescribe under Medicare Part D?
In 2024, John Chandler Workinger, NP had 50 Medicare Part D claims for 41 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.