Marsha Lee Muir, M.D.
Obstetrics & Gynecology Physician · Santa Cruz, CA
Marsha Lee Muir, M.D. is an obstetrics & gynecology physician with a practice address in Santa Cruz, California, and NPI 1740396365, issued on Aug 23, 2006. Check the license (California G50446, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marsha Lee Muir
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G50446 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1779 Dominican Way, Santa Cruz, CA 95065
- Phone
- (831) 479-4966
- Enumerated
- Aug 23, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (831) 479-4967
- Medicare enrollment
- Enrolled (PECOS I20040930000644); accepts Medicare assignment
- Medical or professional school
- George Washington University School Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 1779 Dominican Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- William Francis, DDSEndodontics1770502171
- Meredith Hammig, CNMAdvanced Practice Midwife1457373219
- Amy Herold, MDObstetrics & Gynecology Physician1871779017
- Tanya Machnick, D.D.S., M.S.Endodontics1467521625
Verify Marsha Lee Muir in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G50446Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Dignity Health Medical FoundationSanta Cruz, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marsha Lee Muir among 5,088 obstetrics & gynecology physician records in California
Marsha Lee Muir, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1982 · median 2004 among the 2,700 with a school on file
- Record last updated2007 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Santa Cruz → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Kristin Ayer, CNMSanta Cruz, CA 950651265402093
- Kelli Beingesser, MDSanta Cruz, CA 950651730144528
- Adwoa Christy, MDSanta Cruz, CA 950651225017379
- Janna Doherty, M.D.Santa Cruz, CA 950651790898823
- Angela Lawson, MDSanta Cruz, CA 950651386624989
- Kimberly Moreland, MDSanta Cruz, CA 950651871572008
- Nilda Moreno-Ruiz, MDSanta Cruz, CA 950651619950953
- Stuart Mumm, MDSanta Cruz, CA 950651033287131
Common questions
What is Marsha Lee Muir, M.D.'s NPI number?
Marsha Lee Muir, M.D.'s National Provider Identifier (NPI) is 1740396365, issued on Aug 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marsha Lee Muir, M.D. located?
The NPPES record lists a practice address at 1779 Dominican Way, Santa Cruz, CA, 95065. Phone: (831) 479-4966. Providers update this record themselves, so call before visiting.
How can I verify Marsha Lee Muir, M.D.'s license?
NPPES lists California license number G50446, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Marsha Lee Muir, M.D.'s MIPS final score?
The 2023 MIPS final score is 96.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.