Rehan Ryan Mir Syed, MD, MSC
Infectious Disease Physician · San Rafael, CA
Rehan Ryan Mir Syed, MD, MSC is an infectious disease physician with a practice address in San Rafael, California, and NPI 1134653165, issued on Apr 17, 2017. Check the license (California A159280, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rehan Ryan Mir Syed
- Credential
- MD, MSC
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A159280 CA
Self-reported in NPPES; status is on the state search - Practice location
- 99 Montecillo RD, San Rafael, CA 94903
- Phone
- (415) 444-2619
- Enumerated
- Apr 17, 2017
- Record last updated
- May 5, 2025
- Medicare enrollment
- Enrolled (PECOS I20230622003273); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 99 Montecillo RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mary Air, M.D.Physical Medicine & Rehabilitation Physician1376772913
- Tarik Alagha, MDInternal Medicine Physician1740869676
- Paul Alpert, MDUrology Physician1417031402
Verify Rehan Ryan Mir Syed in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A159280Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average infectious disease physician in 2024
252 Medicare Part D claims for 37 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Biktarvy27 claims
- Atorvastatin Calcium15 claims
- Azithromycin11 claims
- Lisinopril-Hydrochlorothiazide11 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 IncNovato, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rehan Ryan Mir Syed among 1,119 infectious disease physician records in California
Rehan Ryan Mir Syed, MD, MSC is one of 1,119 infectious disease 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 2017, is newer than 88% of them.
- NPI issued2017 · 88% of these records are older, 10% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2017 · median 2003 among the 735 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in San Rafael → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Catherine Treseler, MDSan Rafael, CA 949031730251562
- David Witt, MDSan Rafael, CA 949031710061783
- Anucheat Chea, M.D.Greenbrae, CA 949041952663635
- Lael Duncan, MDKentfield, CA 949041447255740
- Rina Marfatia, M.B.B.S., M.D.Greenbrae, CA 949041508055138
- Gregg Tolliver, M.D.Greenbrae, CA 949041346286465
- Mary Ellen Guroy, MDSan Rafael, CA 949011801971882
- James Heffelfinger, M.D.San Rafael, CA 949011619931698
Common questions
What is Rehan Ryan Mir Syed, MD, MSC's NPI number?
Rehan Ryan Mir Syed, MD, MSC's National Provider Identifier (NPI) is 1134653165, issued on Apr 17, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Rehan Ryan Mir Syed, MD, MSC located?
The NPPES record lists a practice address at 99 Montecillo RD, San Rafael, CA, 94903. Phone: (415) 444-2619. Providers update this record themselves, so call before visiting.
How can I verify Rehan Ryan Mir Syed, MD, MSC's license?
NPPES lists California license number A159280, 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 Rehan Ryan Mir Syed, MD, MSC prescribe under Medicare Part D?
In 2024, Rehan Ryan Mir Syed, MD, MSC had 252 Medicare Part D claims for 37 beneficiaries; the average among infectious disease physician prescribers was 689. 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.