Kirsti Ilona Weng Elder, MD
Internal Medicine Physician · Palo Alto, CA
Kirsti Ilona Weng Elder, MD is an internal medicine physician with a practice address in Palo Alto, California, and NPI 1689769309, issued on Oct 4, 2006. Check the license (California A42867, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kirsti Ilona Weng Elder
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A42867 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Palo Alto, CA 94304
- Phone
- (650) 736-5211
- Enumerated
- Oct 4, 2006
- Record last updated
- Apr 18, 2024
- Medicaid ID
- 00A428670 CA
- Medicare enrollment
- Enrolled (PECOS I20090420000630); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kirsti Ilona Weng Elder in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A42867Check 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 internal medicine physician in 2024
103 Medicare Part D claims for 45 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Atorvastatin Calcium16 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.
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Kirsti Ilona Weng Elder among 17,696 internal medicine physician records in California
Kirsti Ilona Weng Elder, MD 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
- Graduated1985 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 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).
187 internal medicine physician records list a practice address in Palo Alto
They are 187 of the 7,617 NPPES records with a practice address in Palo Alto, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Palo Alto → Internal Medicine Physician nationwide →
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Common questions
What is Kirsti Ilona Weng Elder, MD's NPI number?
Kirsti Ilona Weng Elder, MD's National Provider Identifier (NPI) is 1689769309, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kirsti Ilona Weng Elder, MD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Palo Alto, CA, 94304. Phone: (650) 736-5211. Providers update this record themselves, so call before visiting.
How can I verify Kirsti Ilona Weng Elder, MD's license?
NPPES lists California license number A42867, 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 Kirsti Ilona Weng Elder, MD prescribe under Medicare Part D?
In 2024, Kirsti Ilona Weng Elder, MD had 103 Medicare Part D claims for 45 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.