Shannan Theresa O'Brien, PA-C
Surgical Physician Assistant · Mount Vernon, WA
Shannan Theresa O'Brien, PA-C is a surgical physician assistant with a practice address in Mount Vernon, Washington, and NPI 1700326824, issued on Mar 8, 2017. Check the license (Washington PA60740417, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Shannan Theresa O'Brien
- Credential
- PA-C
- Primary taxonomy
- Surgical Physician Assistant 363AS0400X
- License number
- PA60740417 WA
Self-reported in NPPES; status is on the state search - Practice location
- 2320 Freeway Dr, Mount Vernon, WA 98273
- Phone
- (360) 814-6880
- Enumerated
- Mar 8, 2017
- Record last updated
- Aug 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (360) 814-6953
- Medicare enrollment
- Enrolled (PECOS I20170509002364); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgical physician assistant records → All 609 in Washington → Look up another NPI →
Also registered at 2320 Freeway Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Barton, MDDermatology Physician1598119737
- Mariel Castillo, MDPediatrics Physician1326139700
- Ruthie May Chua, M.D.Rheumatology Physician1215208970
- Ashton De Cardenas, PA-CSurgical Physician Assistant1033688981
- Jennifer Elliott, ARNPFamily Nurse Practitioner1396071601
- Laura Grantham, PACMedical Physician Assistant1609171347
Verify Shannan Theresa O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license PA60740417Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average surgical physician assistant in 2024
85 Medicare Part D claims for 54 beneficiaries, against an average of 304 among the 10,174 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Oxycodone Hcl15 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.
Industry payments in 2024: $338.06
4 payments; by number, the most common kind was food and beverage; the largest payer was Solventum Corporation. The 7,578 providers of this specialty with any payment received $703.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Public Hospital Dist NO 1 SkagitMount Vernon, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Shannan Theresa O'Brien among 609 surgical physician assistant records in Washington
Shannan Theresa O'Brien, PA-C is one of 609 surgical physician assistant records with a practice address in Washington. 85% 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 65% of them.
- NPI issued2017 · 65% of these records are older, 33% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2016 · median 2015 among the 479 with a school on file
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 surgical physician assistant records list a practice address in Mount Vernon
They are 33 of the 1,500 NPPES records with a practice address in Mount Vernon, and 609 surgical physician assistant records in Washington.
All 609 in Washington → Every provider in Mount Vernon → Surgical Physician Assistant nationwide →
The 8 surgical physician assistant records with the nearest ZIP codes
- Ciera Cline, PA-CMount Vernon, WA 982731639950397
- Caryn Clippert, PA-CMount Vernon, WA 982731528484490
- Ashton De Cardenas, PA-CMount Vernon, WA 982731033688981
- Scott Ely, PA-CMount Vernon, WA 982731437448958
- Kent Fry, PA-CMount Vernon, WA 982731013217751
- Brittany Grytdahl, PA-CMount Vernon, WA 982731487063442
- Kristina Mullen, PACMount Vernon, WA 982731588757306
- Kristen Roberts, PA-CMount Vernon, WA 982731235694936
Common questions
What is Shannan Theresa O'Brien, PA-C's NPI number?
Shannan Theresa O'Brien, PA-C's National Provider Identifier (NPI) is 1700326824, issued on Mar 8, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Shannan Theresa O'Brien, PA-C located?
The NPPES record lists a practice address at 2320 Freeway Dr, Mount Vernon, WA, 98273. Phone: (360) 814-6880. Providers update this record themselves, so call before visiting.
How can I verify Shannan Theresa O'Brien, PA-C's license?
NPPES lists Washington license number PA60740417, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Shannan Theresa O'Brien, PA-C prescribe under Medicare Part D?
In 2024, Shannan Theresa O'Brien, PA-C had 85 Medicare Part D claims for 54 beneficiaries; the average among surgical physician assistant prescribers was 304. 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.