Roberto Z. Gonzalez, MD
Internal Medicine Physician · Petaluma, CA
Roberto Z. Gonzalez, MD is an internal medicine physician with a practice address in Petaluma, California, and NPI 1801970892, issued on Oct 25, 2006. Check the license (California A55065, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roberto Z. Gonzalez
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A55065 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3900 Lakeville Hwy, Petaluma, CA 94954
- Phone
- (707) 765-3900
- Enumerated
- Oct 25, 2006
- Record last updated
- Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A550650 CA
- Medicare enrollment
- Enrolled (PECOS I20101119001188); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3900 Lakeville Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alexis Becker, CNMMidwife1225112584
- Sharina Belani, MDInternal Medicine Physician1700958550
Verify Roberto Z. Gonzalez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A55065Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average internal medicine physician in 2024
9,522 Medicare Part D claims for 875 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 701 claims were for opioids.
Most prescribed
- Atorvastatin Calcium563 claims
- Levothyroxine Sodium460 claims
- Hydrocodone-Acetaminophen432 claims
- Lisinopril365 claims
- Amlodipine Besylate346 claims
- Albuterol Sulfate Hfa217 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
- Permanente Medical Group IncStockton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Roberto Z. Gonzalez among 17,696 internal medicine physician records in California
Roberto Z. Gonzalez, MD is one of 17,696 internal medicine 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1994 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
24 internal medicine physician records list a practice address in Petaluma
They are 24 of the 1,856 NPPES records with a practice address in Petaluma, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Petaluma → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sharina Belani, MDPetaluma, CA 949541700958550
- Karen Bloom, MDPetaluma, CA 949541932283009
- Philippe Edouard, MDPetaluma, CA 949541124029491
- Susan Gross, MDPetaluma, CA 949541588714380
- Thomas Maloney, MDPetaluma, CA 949541275533887
- Charles Metzger, MDPetaluma, CA 949541881778959
- Nina Molin, MDPetaluma, CA 949541114059979
- Robert Ostroff, M.D.Petaluma, CA 949541912109240
Common questions
What is Roberto Z. Gonzalez, MD's NPI number?
Roberto Z. Gonzalez, MD's National Provider Identifier (NPI) is 1801970892, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Roberto Z. Gonzalez, MD located?
The NPPES record lists a practice address at 3900 Lakeville Hwy, Petaluma, CA, 94954. Phone: (707) 765-3900. Providers update this record themselves, so call before visiting.
How can I verify Roberto Z. Gonzalez, MD's license?
NPPES lists California license number A55065, 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 Roberto Z. Gonzalez, MD prescribe under Medicare Part D?
In 2024, Roberto Z. Gonzalez, MD had 9,522 Medicare Part D claims for 875 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.