Stacy Jean Zambrano
Internal Medicine Physician · Concord, CA
Stacy Jean Zambrano is an internal medicine physician with a practice address in Concord, California, and NPI 1992094171, issued on Mar 29, 2011. Check the license (California A125232, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stacy Jean Zambrano
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A125232 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2000 Sierra Road, Concord, CA 94518
- Phone
- (925) 363-2000
- Enumerated
- Mar 29, 2011
- Record last updated
- Jan 4, 2023
- Medicare enrollment
- Enrolled (PECOS I20150227002053); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2000 Sierra Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rosario AcevesClinical Social Worker1639504301
- Luciana Cisneros, RDRegistered Dietitian1669195293
- Emily Corrigan, MDHospitalist Physician1316081722
- Grace Huang Tarnow, NPNurse Practitioner1932829587
- German Huerta Castro, NPFamily Nurse Practitioner1669921631
- Karla Mansilla, MA, MPA, ASWSocial Worker1477064079
Verify Stacy Jean Zambrano in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A125232Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,077 Medicare Part D claims for 171 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 50 claims were for opioids.
Most prescribed
- Atorvastatin Calcium118 claims
- Metformin Hcl78 claims
- Amlodipine Besylate76 claims
- Losartan Potassium49 claims
- Lisinopril48 claims
- Hydrocodone-Acetaminophen47 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.
Industry payments in 2024: $20.79
1 payment: food and beverage; the largest payer was Hologic Sales and Service, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- LA Clinica DE LA Raza IncConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stacy Jean Zambrano among 17,696 internal medicine physician records in California
Stacy Jean Zambrano 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 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2011 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Concord → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Huaming Chou, MDConcord, CA 945181902868672
- Syed Naqvi, MDConcord, CA 945181073692117
- Alireza Rezapour, M.DConcord, CA 945181043370224
- William Morfeld, M.D.Clayton, CA 945171306145107
- Johnson Adeyanju, M.D.Concord, CA 945201467403147
- Mike Bannout, M.D.Concord, CA 945201598784662
- David Bressler, M.D.Concord, CA 945201962456210
- Anna Chang, M.D.Concord, CA 945201568402931
Common questions
What is Stacy Jean Zambrano's NPI number?
Stacy Jean Zambrano's National Provider Identifier (NPI) is 1992094171, issued on Mar 29, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Stacy Jean Zambrano located?
The NPPES record lists a practice address at 2000 Sierra Road, Concord, CA, 94518. Phone: (925) 363-2000. Providers update this record themselves, so call before visiting.
How can I verify Stacy Jean Zambrano's license?
NPPES lists California license number A125232, 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 Stacy Jean Zambrano prescribe under Medicare Part D?
In 2024, Stacy Jean Zambrano had 1,077 Medicare Part D claims for 171 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.