Sybil Nedumchira Zachariah, M.D.
Emergency Medicine Physician · Stanford, CA
Sybil Nedumchira Zachariah, M.D. is an emergency medicine physician with a practice address in Stanford, California, and NPI 1508202094, issued on May 11, 2013. Check the license (California A131673, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sybil Nedumchira Zachariah
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A131673 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-6269
- Enumerated
- May 11, 2013
- Record last updated
- May 16, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (650) 723-0121
- Medicare enrollment
- Enrolled (PECOS I20160510002338); accepts Medicare assignment
- Medical or professional school
- Un Of California, Irvine, College Of Medicine, 2013
- Entity
- Type 1 · individual
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cooper Aakhus, MDEmergency Medicine Physician1194351007
- Oliver Aalami, M.D.Vascular Surgery Physician1225229024
- Alistair Aaronson, MDInternal Medicine Physician1457628760
- Sumaira Aasi, MDMOHS-Micrographic Surgery Physician1780675181
- Fahim Abbasi, M.D.Internal Medicine Physician1841484037
- Mohamad Abbass, MDNeurological Surgery Physician1679492151
Verify Sybil Nedumchira Zachariah in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A131673Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average emergency medicine physician in 2024
258 Medicare Part D claims for 188 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 28 claims were for opioids.
Most prescribed
- Cephalexin49 claims
- Ondansetron Odt19 claims
- Cefdinir16 claims
- Prednisone16 claims
- Hydrocodone-Acetaminophen15 claims
- Azithromycin13 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Mills-Peninsula Emergency Medical Associates, IncBurlingame, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
163 emergency medicine physician records list a practice address in Stanford
They are 163 of the 5,606 NPPES records with a practice address in Stanford, and 7,751 emergency medicine physician records in California.
All 163 in Stanford → All 7,751 in California → Every provider in Stanford →
Other emergency medicine physician records in California
- Cooper Aakhus, MDStanford, CA1194351007
- Pyra Aarden, MDMartinez, CA1417058199
- Neal Aaron, D.O.Encinitas, CA1114283520
- Eric AaserudeWalnut Creek, CA1811491194
- Nader Abas, MDBarstow, CA1346288305
- Michael Abbo, MDNovato, CA1205819042
- Daniel Abbott, MDFullerton, CA1518907864
- Paul-Andre Abboud, M.D.Oakland, CA1710065503
- Mostafa Abdel-Hamid, MDStanford, CA1457918740
- Ashraf Abdel-KerimChino, CA1396961538
Common questions
What is Sybil Nedumchira Zachariah, M.D.'s NPI number?
Sybil Nedumchira Zachariah, M.D.'s National Provider Identifier (NPI) is 1508202094, issued on May 11, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Sybil Nedumchira Zachariah, M.D. located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-6269. Providers update this record themselves, so call before visiting.
How can I verify Sybil Nedumchira Zachariah, M.D.'s license?
NPPES lists California license number A131673, 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 Sybil Nedumchira Zachariah, M.D. prescribe under Medicare Part D?
In 2024, Sybil Nedumchira Zachariah, M.D. had 258 Medicare Part D claims for 188 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Sybil Nedumchira Zachariah, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.