Joseph Morris Isaacson, MD
Rheumatology Physician · San Jose, CA
Joseph Morris Isaacson, MD is a rheumatology physician with a practice address in San Jose, California, and NPI 1356305551, issued on Apr 14, 2006. Check the license (California G40276, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Morris Isaacson
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- G40276 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2516 Samaritan Dr Ste B, San Jose, CA 95124
- Phone
- (408) 370-1100
- Enumerated
- Apr 14, 2006
- Record last updated
- Nov 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (408) 370-1102
- Medicaid ID
- 00G402760 CA
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 2516 Samaritan Dr Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charissa Farris, MDOrthopaedic Surgery Physician1023227733
Verify Joseph Morris Isaacson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G40276Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average rheumatology physician in 2024
17 Medicare Part D claims, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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: $23.17
1 payment: food and beverage; the largest payer was Iti, Inc. (d/b/a Intra-Cellular Therapies, Inc.). The 4,486 providers of this specialty with any payment received $8,538.33 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.
Joseph Morris Isaacson among 926 rheumatology physician records in California
Joseph Morris Isaacson, MD is one of 926 rheumatology physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in San Jose → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Helen Feng, MDSan Jose, CA 951241629174149
- Arina Garg, M.D.San Jose, CA 951241568803815
- Jennifer Burkham, MDSan Jose, CA 951281174670350
- Thomas Bush, MDSan Jose, CA 951281821061334
- Alice ChuangSan Jose, CA 951281316333065
- Henry Co, MDSan Jose, CA 951191699853267
- Jennifer Lee, M.D.San Jose, CA 951191275519092
- Jan Lin, MDSan Jose, CA 951191841326386
Common questions
What is Joseph Morris Isaacson, MD's NPI number?
Joseph Morris Isaacson, MD's National Provider Identifier (NPI) is 1356305551, issued on Apr 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Morris Isaacson, MD located?
The NPPES record lists a practice address at 2516 Samaritan Dr Ste B, San Jose, CA, 95124. Phone: (408) 370-1100. Providers update this record themselves, so call before visiting.
How can I verify Joseph Morris Isaacson, MD's license?
NPPES lists California license number G40276, 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 Joseph Morris Isaacson, MD prescribe under Medicare Part D?
In 2024, Joseph Morris Isaacson, MD had 17 Medicare Part D claims; the average among rheumatology physician prescribers was 1,978. 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.