Marion Massaro, ARNP
Registered Nurse · Bellingham, WA
Marion Massaro, ARNP is a registered nurse with a practice address in Bellingham, Washington, and NPI 1114974169, issued on May 27, 2006. Check the license with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marion Massaro
- Credential
- ARNP
- Primary taxonomy
- Registered Nurse 163W00000X
- License numbers
- RN581388 CA
NP15700 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1112 11TH Street #301, Bellingham, WA 98225
- Phone
- (760) 471-4073
- Enumerated
- May 27, 2006
- Record last updated
- May 13, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (760) 471-4078
- Entity
- Type 1 · individual
8 nearest registered nurse records → All 5,708 in Washington → Look up another NPI →
Verify Marion Massaro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington 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
82% fewer Medicare Part D claims than the average registered nurse in 2024
120 Medicare Part D claims, against an average of 678 among the 694 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluoxetine Hcl32 claims
- Dextroamphetamine-Amphet Er17 claims
- Clonazepam12 claims
- Divalproex Sodium Er12 claims
- Lithium Carbonate12 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.
Marion Massaro among 5,708 registered nurse records in Washington
Marion Massaro, ARNP is one of 5,708 registered nurse records with a practice address in Washington. under 1% 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 under 1% of them.
- NPI issued2006 · under 1% of these records are older, 97% newer
- In a Medicare fileYes · under 1% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2008 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163W00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
127 registered nurse records list a practice address in Bellingham
They are 127 of the 5,172 NPPES records with a practice address in Bellingham, and 5,708 registered nurse records in Washington.
All 5,708 in Washington → Every provider in Bellingham → Registered Nurse nationwide →
The 8 registered nurse records with the nearest ZIP codes
- Erin Allison, BSN, RN, CENBellingham, WA 982251891255162
- Susanne Branch, RNFABellingham, WA 982251710595947
- Jeannette Evraets, RN LACBellingham, WA 982251740299403
- Christine Gibbs, LM, RNBellingham, WA 982251073657292
- Maryanne Hembree, RNBellingham, WA 982251477701266
- James Martin, RNBellingham, WA 982251629670575
- Katrina Nanio, RNBellingham, WA 982251730665928
- Misti PerryBellingham, WA 982251164990230
Common questions
What is Marion Massaro, ARNP's NPI number?
Marion Massaro, ARNP's National Provider Identifier (NPI) is 1114974169, issued on May 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marion Massaro, ARNP located?
The NPPES record lists a practice address at 1112 11TH Street #301, Bellingham, WA, 98225. Phone: (760) 471-4073. Providers update this record themselves, so call before visiting.
How can I verify Marion Massaro, ARNP's license?
Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Marion Massaro, ARNP prescribe under Medicare Part D?
In 2024, Marion Massaro, ARNP had 120 Medicare Part D claims; the average among registered nurse prescribers was 678. 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.