Sari Jane Kasper, D.O.
Obstetrics & Gynecology Physician · Walnut Creek, CA
Sari Jane Kasper, D.O. is an obstetrics & gynecology physician with a practice address in Walnut Creek, California, and NPI 1194739110, issued on Jul 27, 2006. Check the license (California 20A9289, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sari Jane Kasper
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 20A9289 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2637 Shadelands Dr, Walnut Creek, CA 94598
- Phone
- (925) 945-6600
- Enumerated
- Jul 27, 2006
- Record last updated
- Feb 11, 2025
- Fax
- (925) 945-7842
- Medicare enrollment
- Enrolled (PECOS I20070226000707); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 2637 Shadelands Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anita Anand, NPFamily Nurse Practitioner1023993102
- Stacyann Andaya, NPFamily Nurse Practitioner1649893660
- Audrey Arzamendi, M.D.Endocrinology, Diabetes & Metabolism Physician1508159567
- Anthony Bernens, MDInternal Medicine Physician1215983440
- Jennifer Chan, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1265634687
- Heidi Chang, MDObstetrics & Gynecology Physician1649681982
Verify Sari Jane Kasper in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9289Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
167 Medicare Part D claims for 75 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Estradiol44 claims
- Progesterone19 claims
- Estradiol (Twice Weekly)18 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.
Industry payments in 2024: $94.30
5 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Bass Medical GroupAlamo, CA
- Epic CareWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sari Jane Kasper among 5,088 obstetrics & gynecology physician records in California
Sari Jane Kasper, D.O. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2002 · median 2004 among the 2,700 with a school on file
- Record last updated2025 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
56 obstetrics & gynecology physician records list a practice address in Walnut Creek
They are 56 of the 6,170 NPPES records with a practice address in Walnut Creek, and 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Walnut Creek → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Rosemary DelgadoWalnut Creek, CA 945981235140500
- Anh Do, MDWalnut Creek, CA 945981548362122
- Tanees Edraki, MDWalnut Creek, CA 945981881644482
- Yaron Friedman, M.D.Walnut Creek, CA 945981730104704
- Nadine Hanna, M.D.Walnut Creek, CA 945981043244007
- Luman Hughes, M.D.Walnut Creek, CA 945981124040274
- Gerald Katz, M.D.Walnut Creek, CA 945981306868450
- Mindy Plotkin, MDWalnut Creek, CA 945981588742050
Common questions
What is Sari Jane Kasper, D.O.'s NPI number?
Sari Jane Kasper, D.O.'s National Provider Identifier (NPI) is 1194739110, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sari Jane Kasper, D.O. located?
The NPPES record lists a practice address at 2637 Shadelands Dr, Walnut Creek, CA, 94598. Phone: (925) 945-6600. Providers update this record themselves, so call before visiting.
How can I verify Sari Jane Kasper, D.O.'s license?
NPPES lists California license number 20A9289, 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 Sari Jane Kasper, D.O. prescribe under Medicare Part D?
In 2024, Sari Jane Kasper, D.O. had 167 Medicare Part D claims for 75 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.