Michael C. Chase, MD
Internal Medicine Physician · Sausalito, CA
Michael C. Chase, MD is an internal medicine physician with a practice address in Sausalito, California, and NPI 1457423105, issued on Nov 15, 2006. Check the license (California G25829, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael C. Chase
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G25829 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3 Harbor Dr Ste 111, Sausalito, CA 94965
- Phone
- (415) 683-2988
- Enumerated
- Nov 15, 2006
- Record last updated
- Oct 27, 2025
- Fax
- (415) 683-2980
- Medicare enrollment
- Enrolled (PECOS I20091116000505); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1972
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 3 Harbor Dr Ste 111
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael C. Chase in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G25829Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,066 Medicare Part D claims for 630 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 33 claims were for opioids.
Most prescribed
- Atorvastatin Calcium220 claims
- Levothyroxine Sodium119 claims
- Amlodipine Besylate82 claims
- Lisinopril74 claims
- Losartan Potassium55 claims
- Alendronate Sodium54 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.
7 internal medicine physician records list a practice address in Sausalito
They are 7 of the 200 NPPES records with a practice address in Sausalito, and 17,696 internal medicine physician records in California.
All 7 in Sausalito → All 17,696 in California → Every provider in Sausalito →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Michael C. Chase, MD's NPI number?
Michael C. Chase, MD's National Provider Identifier (NPI) is 1457423105, issued on Nov 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael C. Chase, MD located?
The NPPES record lists a practice address at 3 Harbor Dr Ste 111, Sausalito, CA, 94965. Phone: (415) 683-2988. Providers update this record themselves, so call before visiting.
How can I verify Michael C. Chase, MD's license?
NPPES lists California license number G25829, 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 Michael C. Chase, MD prescribe under Medicare Part D?
In 2024, Michael C. Chase, MD had 2,066 Medicare Part D claims for 630 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.