Catherine B. Treseler, MD
Infectious Disease Physician · San Rafael, CA
Catherine B. Treseler, MD is an infectious disease physician with a practice address in San Rafael, California, and NPI 1730251562, issued on Nov 15, 2006. Check the license (California A54301, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine B. Treseler
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A54301 CA
Self-reported in NPPES; status is on the state search - Practice location
- 99 Montecillo RD, San Rafael, CA 94903
- Phone
- (415) 444-2000
- Enumerated
- Nov 15, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00A543010 CA
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 99 Montecillo RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Paul Alpert, MDUrology Physician1417031402
Verify Catherine B. Treseler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A54301Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average infectious disease physician in 2024
13 Medicare Part D claims, against an average of 689 among the 7,388 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.
Catherine B. Treseler among 1,119 infectious disease physician records in California
Catherine B. Treseler, MD is one of 1,119 infectious disease physician records with a practice address in California. 79% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2007 · 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 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in San Rafael → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Rehan Syed, MD, MSCSan Rafael, CA 949031134653165
- David Witt, MDSan Rafael, CA 949031710061783
- Anucheat Chea, M.D.Greenbrae, CA 949041952663635
- Lael Duncan, MDKentfield, CA 949041447255740
- Rina Marfatia, M.B.B.S., M.D.Greenbrae, CA 949041508055138
- Gregg Tolliver, M.D.Greenbrae, CA 949041346286465
- Mary Ellen Guroy, MDSan Rafael, CA 949011801971882
- James Heffelfinger, M.D.San Rafael, CA 949011619931698
Common questions
What is Catherine B. Treseler, MD's NPI number?
Catherine B. Treseler, MD's National Provider Identifier (NPI) is 1730251562, issued on Nov 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine B. Treseler, MD located?
The NPPES record lists a practice address at 99 Montecillo RD, San Rafael, CA, 94903. Phone: (415) 444-2000. Providers update this record themselves, so call before visiting.
How can I verify Catherine B. Treseler, MD's license?
NPPES lists California license number A54301, 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 Catherine B. Treseler, MD prescribe under Medicare Part D?
In 2024, Catherine B. Treseler, MD had 13 Medicare Part D claims; the average among infectious disease physician prescribers was 689. 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.