Marsha Guisard, MD
Physical Medicine & Rehabilitation Physician · Mill Valley, CA
Marsha Guisard, MD is a physical medicine & rehabilitation physician with a practice address in Mill Valley, California, and NPI 1629194121, issued on Mar 22, 2007. Check the license (California A106091, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marsha Guisard
- Credential
- MD
- Primary taxonomy
- Physical Medicine & Rehabilitation Physician 208100000X
- License number
- A106091 CA
Self-reported in NPPES; status is on the state search - Practice location
- 591 Redwood Hwy, Mill Valley, CA 94941
- Phone
- (415) 380-1840
- Enumerated
- Mar 22, 2007
- Record last updated
- Jul 19, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physical medicine & rehabilitation physician records → All 1,549 in California → Look up another NPI →
Also registered at 591 Redwood Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marsha Guisard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A106091Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average physical medicine & rehabilitation physician in 2024
115 Medicare Part D claims, against an average of 727 among the 7,448 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 49 claims were for opioids.
Most prescribed
- Oxycodone Hcl22 claims
- Hydrocodone-Acetaminophen16 claims
- Lubiprostone13 claims
- Gabapentin12 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.
Marsha Guisard among 1,549 physical medicine & rehabilitation physician records in California
Marsha Guisard, MD is one of 1,549 physical medicine & rehabilitation physician records with a practice address in California. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 30% of them.
- NPI issued2007 · 30% of these records are older, 59% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileNo · 51% of these records are
- Record last updated2019 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208100000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Medicine & Rehabilitation Physician providers in California
There are 1,549 physical medicine & rehabilitation physician records in California.
All 1,549 in California → Every provider in Mill Valley → Physical Medicine & Rehabilitation Physician nationwide →
The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes
- Brooke Bennis, D.O.Mill Valley, CA 949411811169683
- Ernest Sponzilli, M.D.Larkspur, CA 949391497709984
- Cristie Bennett, P.T.Novato, CA 949451104153360
- Holly Kelly, MDNovato, CA 949451619076528
- Madeleine Alfiero, DPTFairfax, CA 949301710503024
- Shannon Chain, MDPetaluma, CA 949541447575428
- Diane Murray, MDPetaluma, CA 949541174607154
- Alex Barchuk, M.D.Kentfield, CA 949041851315774
Common questions
What is Marsha Guisard, MD's NPI number?
Marsha Guisard, MD's National Provider Identifier (NPI) is 1629194121, issued on Mar 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marsha Guisard, MD located?
The NPPES record lists a practice address at 591 Redwood Hwy, Mill Valley, CA, 94941. Phone: (415) 380-1840. Providers update this record themselves, so call before visiting.
How can I verify Marsha Guisard, MD's license?
NPPES lists California license number A106091, 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.
How much does Marsha Guisard, MD prescribe under Medicare Part D?
In 2024, Marsha Guisard, MD had 115 Medicare Part D claims; the average among physical medicine & rehabilitation physician prescribers was 727. 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.