Michael David Stein, M.D.
Internal Medicine Physician · Campbell, CA
Michael David Stein, M.D. is an internal medicine physician with a practice address in Campbell, California, and NPI 1639157274, issued on Jan 4, 2006. Check the license (California C53525, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael David Stein
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C53525 CA
9884 NV
Self-reported in NPPES; status is on the state search - Practice location
- 220 E Hacienda Ave, Campbell, CA 95008
- Phone
- (408) 871-9440
- Enumerated
- Jan 4, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (408) 871-6302
- Medicaid IDs
- 002018526 NV
100500484 NE - Medicare enrollment
- Enrolled (PECOS I20101213000219); accepts Medicare assignment
- Medical or professional school
- Stanford University School Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 220 E Hacienda Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael David Stein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C53525Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average internal medicine physician in 2024
4,854 Medicare Part D claims for 643 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium547 claims
- Amlodipine Besylate300 claims
- Lisinopril219 claims
- Losartan Potassium211 claims
- Levothyroxine Sodium175 claims
- Atenolol122 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 IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael David Stein among 17,696 internal medicine physician records in California
Michael David Stein, M.D. 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
- Graduated1998 · 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).
25 internal medicine physician records list a practice address in Campbell
They are 25 of the 1,821 NPPES records with a practice address in Campbell, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Campbell → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sameer Awsare, MDCampbell, CA 950081598842437
- Sailaja Bommakanti, M.D.Campbell, CA 950081194828285
- Lily Boris, M.D.Campbell, CA 950081801988977
- Debra Fetters, MDCampbell, CA 950081689751547
- Andrew Hwang, MDCampbell, CA 950081679650535
- Aradhana Kar, MDCampbell, CA 950081447358692
- James Kastelman, MDCampbell, CA 950081730266677
- Rupinder Kaur, MDCampbell, CA 950081386721231
Common questions
What is Michael David Stein, M.D.'s NPI number?
Michael David Stein, M.D.'s National Provider Identifier (NPI) is 1639157274, issued on Jan 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael David Stein, M.D. located?
The NPPES record lists a practice address at 220 E Hacienda Ave, Campbell, CA, 95008. Phone: (408) 871-9440. Providers update this record themselves, so call before visiting.
How can I verify Michael David Stein, M.D.'s license?
NPPES lists California license number C53525, 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 David Stein, M.D. prescribe under Medicare Part D?
In 2024, Michael David Stein, M.D. had 4,854 Medicare Part D claims for 643 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.