Graycen Duffy, ARNP
Family Nurse Practitioner · Walla Walla, WA
Graycen Duffy, ARNP is a family nurse practitioner with a practice address in Walla Walla, Washington, and NPI 1851839682, issued on Jan 31, 2017. Check the license (Washington AP 60725057, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Graycen Duffy
- Credential
- ARNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- AP 60725057 WA
Self-reported in NPPES; status is on the state search - Practice location
- 380 Chase Ave, Walla Walla, WA 99362
- Phone
- (509) 897-3700
- Enumerated
- Jan 31, 2017
- Record last updated
- May 11, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (509) 897-5575
- Medicare enrollment
- Enrolled (PECOS I20170224001065); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 3,781 in Washington → Look up another NPI →
Also registered at 380 Chase Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Angela Bly, RNHome Health Registered Nurse1801624325
- Abigail BradleyPhysician Assistant1013785955
- Sarah CochellPhysical Therapy Assistant1528809282
Verify Graycen Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license AP 60725057Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average family nurse practitioner in 2024
710 Medicare Part D claims for 299 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Levothyroxine Sodium49 claims
- Amoxicillin-Clavulanate Potass32 claims
- Losartan Potassium23 claims
- Atorvastatin Calcium19 claims
- Fluconazole19 claims
- Doxycycline Hyclate18 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
- Providence Health And Services - WashingtonWalla Walla, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Graycen Duffy among 3,781 family nurse practitioner records in Washington
Graycen Duffy, ARNP is one of 3,781 family nurse practitioner records with a practice address in Washington. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 52% of them.
- NPI issued2017 · 52% of these records are older, 43% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2016 · median 2018 among the 2,116 with a school on file
- Record last updated2021 · 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 Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 family nurse practitioner records list a practice address in Walla Walla
They are 30 of the 1,276 NPPES records with a practice address in Walla Walla, and 3,781 family nurse practitioner records in Washington.
All 3,781 in Washington → Every provider in Walla Walla → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Eileen Bow, ARNP-FPWalla Walla, WA 993621962487132
- Jennifer Christenson, ARNPWalla Walla, WA 993621457336158
- Ellen Collette, A.R.N.P.Walla Walla, WA 993621760685424
- Elizabeth Eaton-Gamsby, R.N., F.N.P.Walla Walla, WA 993621720114366
- Susan Friesen, FNP, ARNPWalla Walla, WA 993621225208333
- Michael Frizelle, FNPWalla Walla, WA 993621699931493
- Paul Holce, ARNP-CWalla Walla, WA 993621225049992
- Laura Hollister-Meadows, FNP-BCWalla Walla, WA 993621477534972
Common questions
What is Graycen Duffy, ARNP's NPI number?
Graycen Duffy, ARNP's National Provider Identifier (NPI) is 1851839682, issued on Jan 31, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Graycen Duffy, ARNP located?
The NPPES record lists a practice address at 380 Chase Ave, Walla Walla, WA, 99362. Phone: (509) 897-3700. Providers update this record themselves, so call before visiting.
How can I verify Graycen Duffy, ARNP's license?
NPPES lists Washington license number AP 60725057, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Graycen Duffy, ARNP prescribe under Medicare Part D?
In 2024, Graycen Duffy, ARNP had 710 Medicare Part D claims for 299 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.