Justine Shum, M.D.
Rheumatology Physician · Novato, CA
Justine Shum, M.D. is a rheumatology physician with a practice address in Novato, California, and NPI 1730592437, issued on Jun 10, 2014. Check the license (California A163211, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Justine Shum
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A163211 CA
Self-reported in NPPES; status is on the state search - Practice location
- 75 Rowland Way Ste 101, Novato, CA 94945
- Phone
- (415) 464-9604
- Enumerated
- Jun 10, 2014
- Record last updated
- Jan 29, 2022
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Verify Justine Shum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A163211Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average rheumatology physician in 2024
62 Medicare Part D claims for 33 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Hydroxychloroquine Sulfate19 claims
- Methotrexate11 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.
Justine Shum among 926 rheumatology physician records in California
Justine Shum, M.D. 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 2014, is newer than 79% of them.
- NPI issued2014 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2022 · 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 Novato → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Donald Pierce, MDNovato, CA 949451043394018
- Arundathi Malladi, M.D.Larkspur, CA 949391073709416
- Gregory Bell, MDTiburon, CA 949201053425116
- Elizabeth Smith, MDGreenbrae, CA 949041235230525
- Peter Stein, M.D.Greenbrae, CA 949041730295643
- Izza Bazigh, M.DSan Rafael, CA 949031679196836
- Neal Birnbaum, M.D.San Rafael, CA 949031437142882
- Maurice Kinsolving, MDSan Rafael, CA 949031033293006
Common questions
What is Justine Shum, M.D.'s NPI number?
Justine Shum, M.D.'s National Provider Identifier (NPI) is 1730592437, issued on Jun 10, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Justine Shum, M.D. located?
The NPPES record lists a practice address at 75 Rowland Way Ste 101, Novato, CA, 94945. Phone: (415) 464-9604. Providers update this record themselves, so call before visiting.
How can I verify Justine Shum, M.D.'s license?
NPPES lists California license number A163211, 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 Justine Shum, M.D. prescribe under Medicare Part D?
In 2024, Justine Shum, M.D. had 62 Medicare Part D claims for 33 beneficiaries; 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.