Gregg Tolliver, M.D.
Infectious Disease Physician · Greenbrae, CA
Gregg Tolliver, M.D. is an infectious disease physician with a practice address in Greenbrae, California, and NPI 1346286465, issued on Jun 20, 2006. Check the license (California A88295, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregg Tolliver
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A88295 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100A Drake's Landing Road, Greenbrae, CA 94904
- Phone
- (415) 924-1214
- Enumerated
- Jun 20, 2006
- Record last updated
- Aug 18, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (415) 924-1375
- Medicaid ID
- 00A882950 CA
- Medicare enrollment
- Enrolled (PECOS I20041023000118); may accept Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 100A Drake's Landing Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janet Bodle, MDGeneral Practice Physician1013031913
- Guy Livnat, MDPulmonary Disease Physician1881682656
Verify Gregg Tolliver in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A88295Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average infectious disease physician in 2024
92 Medicare Part D claims for 37 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
Most prescribed
- Ampicillin Sodium19 claims
- Cephalexin14 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.
Bills Medicare through one group practice
- Regents Univ OF California UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregg Tolliver among 1,119 infectious disease physician records in California
Gregg Tolliver, M.D. 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 fileYes · 66% of these records are
- Graduated1997 · median 2003 among the 735 with a school on file
- Record last updated2011 · 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 Greenbrae → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Anucheat Chea, M.D.Greenbrae, CA 949041952663635
- Lael Duncan, MDKentfield, CA 949041447255740
- Rina Marfatia, M.B.B.S., M.D.Greenbrae, CA 949041508055138
- Rehan Syed, MD, MSCSan Rafael, CA 949031134653165
- Catherine Treseler, MDSan Rafael, CA 949031730251562
- David Witt, MDSan Rafael, CA 949031710061783
- Mary Ellen Guroy, MDSan Rafael, CA 949011801971882
- James Heffelfinger, M.D.San Rafael, CA 949011619931698
Common questions
What is Gregg Tolliver, M.D.'s NPI number?
Gregg Tolliver, M.D.'s National Provider Identifier (NPI) is 1346286465, issued on Jun 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregg Tolliver, M.D. located?
The NPPES record lists a practice address at 100A Drake's Landing Road, Greenbrae, CA, 94904. Phone: (415) 924-1214. Providers update this record themselves, so call before visiting.
How can I verify Gregg Tolliver, M.D.'s license?
NPPES lists California license number A88295, 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 Gregg Tolliver, M.D. prescribe under Medicare Part D?
In 2024, Gregg Tolliver, M.D. had 92 Medicare Part D claims for 37 beneficiaries; 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.