Siera Panhwar, M.D.
Internal Medicine Physician · Brea, CA
Siera Panhwar, M.D. is an internal medicine physician with a practice address in Brea, California, and NPI 1790863306, issued on Nov 1, 2006. Check the license (California A97303, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Siera Panhwar
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A97303 CA
Self-reported in NPPES; status is on the state search - Practice location
- 407 W Imperial Hwy # H171, Brea, CA 92821
- Phone
- (562) 365-3540
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (562) 365-3532
- Medicare enrollment
- Enrolled (PECOS I20070926000690); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Siera Panhwar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A97303Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
371 Medicare Part D claims for 128 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Furosemide25 claims
- Cefpodoxime Proxetil19 claims
- Pradaxa18 claims
- Atorvastatin Calcium15 claims
- Metoprolol Tartrate14 claims
- Ciprofloxacin Hcl12 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
- Southern California Permanente Medical GroupOntario, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Siera Panhwar among 17,696 internal medicine physician records in California
Siera Panhwar, 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
- Graduated2003 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Brea → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Pearl D'Sa, M.D.Brea, CA 928211942233671
- Franklin Dawes, M.D.Brea, CA 928211295760007
- Edward Hutchison, M.D.Brea, CA 928211912982026
- Aeri Kang, M.D.Brea, CA 928211689660755
- Paulynne Liang, MDBrea, CA 928211093700064
- Quoc Nguyen, M.D., M.P.HBrea, CA 928211043240450
- Nadia Tadros, M.D.Brea, CA 928211548467210
- Elizabeth Cheng, MDAnaheim, CA 928171013278449
Common questions
What is Siera Panhwar, M.D.'s NPI number?
Siera Panhwar, M.D.'s National Provider Identifier (NPI) is 1790863306, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Siera Panhwar, M.D. located?
The NPPES record lists a practice address at 407 W Imperial Hwy # H171, Brea, CA, 92821. Phone: (562) 365-3540. Providers update this record themselves, so call before visiting.
How can I verify Siera Panhwar, M.D.'s license?
NPPES lists California license number A97303, 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 Siera Panhwar, M.D. prescribe under Medicare Part D?
In 2024, Siera Panhwar, M.D. had 371 Medicare Part D claims for 128 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.