Marcia Tumy Byrnes, RN, FNP
Family Nurse Practitioner · San Rafael, CA
Marcia Tumy Byrnes, RN, FNP is a family nurse practitioner with a practice address in San Rafael, California, and NPI 1801035043, issued on Feb 11, 2009. Check the license (California 18821, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marcia Tumy Byrnes
- Credential
- RN, FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 18821 CA
19099 CA
236717 CA
Self-reported in NPPES; status is on the state search - Practice location
- 16 Ritter St, San Rafael, CA 94901
- Phone
- (415) 457-8182
- Enumerated
- Feb 11, 2009
- Record last updated
- Feb 11, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (415) 457-3490
- Entity
- Type 1 · individual
Also registered at 16 Ritter St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maryanne BattaglinoCase Manager/Care Coordinator1275713604
- Michael BeyerClinical Social Worker1457601049
- Alec BradburyFamily Nurse Practitioner1902557226
- Katherine Buaron, DNP, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1780547182
- Carmen Carrouche, RN, CNS, PMH-NPPsychiatric/Mental Health Nurse Practitioner1043451198
- Brianna Doyle, RADTAddiction (Substance Use Disorder) Counselor1053194910
Verify Marcia Tumy Byrnes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 18821Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average family nurse practitioner in 2024
73 Medicare Part D claims, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
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.
32 family nurse practitioner records list a practice address in San Rafael
They are 32 of the 3,159 NPPES records with a practice address in San Rafael, and 16,966 family nurse practitioner records in California.
All 32 in San Rafael → All 16,966 in California → Every provider in San Rafael →
Other family nurse practitioner records in California
- Danielle Aaroe, FAMILY NURSE PRACTITOroville, CA1750767083
- Joshua AaronMission Hills, CA1477291805
- Orly Aaron, NPSan Francisco, CA1376912451
- Paris Gilbert Russ AaronSacramento, CA1871079111
- Tiffanne Aaronsen, FNPIndio, CA1568191807
- Alvin Joseph Abad, FNP-CSan Francisco, CA1154919306
- Frances Abad, FNPLos Angeles, CA1053504514
- Nnenna AbaezeLong Beach, CA1457820763
- Raymond Abagat, FNPTorrance, CA1306685821
- Ashley AbalCastaic, CA1740140698
Common questions
What is Marcia Tumy Byrnes, RN, FNP's NPI number?
Marcia Tumy Byrnes, RN, FNP's National Provider Identifier (NPI) is 1801035043, issued on Feb 11, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Marcia Tumy Byrnes, RN, FNP located?
The NPPES record lists a practice address at 16 Ritter St, San Rafael, CA, 94901. Phone: (415) 457-8182. Providers update this record themselves, so call before visiting.
How can I verify Marcia Tumy Byrnes, RN, FNP's license?
NPPES lists California license number 18821, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Marcia Tumy Byrnes, RN, FNP prescribe under Medicare Part D?
In 2024, Marcia Tumy Byrnes, RN, FNP had 73 Medicare Part D claims; 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.