Jennifer Casey
Endocrinology, Diabetes & Metabolism Physician · Castro Valley, CA
Jennifer Casey is an endocrinology, diabetes & metabolism physician with a practice address in Castro Valley, California, and NPI 1750524575, issued on Apr 8, 2009. Check the license (California 20A11524, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jennifer Casey
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 20A11524 CA
036141322 IL
Self-reported in NPPES; status is on the state search - Practice location
- 20101 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (510) 204-1844
- Enumerated
- Apr 8, 2009
- Entity
- Type 1 · individual
Also registered at 20101 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tania Benjamin, MDPlastic Surgery within the Head & Neck (Otolaryngology) Physician1093276131
- Mandeep Chadha, AUDAudiologist1346078086
- Anthony Chan, M.D.Student in an Organized Health Care Education/Training Program1285070235
- Phassarin Chansakul, MDPediatrics Physician1922413038
- Nalurporn Chokrungvaranon, M.D.Endocrinology, Diabetes & Metabolism Physician1922209436
- Huong Dang, MDFamily Medicine Physician1417390071
Verify Jennifer Casey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A11524Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
73% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
728 Medicare Part D claims for 111 beneficiaries, against an average of 2,739 among the 6,176 providers of this specialty who prescribed in Part D. Brand-name drugs were 56% of claims.
Most prescribed
- Ozempic109 claims
- Levothyroxine Sodium102 claims
- Mounjaro63 claims
- Alendronate Sodium43 claims
- Atorvastatin Calcium38 claims
- Jardiance37 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 or facility affiliation
- Sutter Bay Medical FoundationCastro Valley, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 890 endocrinology, diabetes & metabolism physician records in California.
Other endocrinology, diabetes & metabolism physician records in California
- Anita Abraham, M.D.Stockton, CA1558380337
- Sallie Adams, M.D.Roseville, CA1255342085
- Ananta AddalaPalo Alto, CA1740669563
- Helen Adelberg, M.D.Encino, CA1093935447
- David Aftergood, MDBeverly Hills, CA1639259328
- Bahar Aghighi, MDSanta Cruz, CA1770562134
- Tyler Aguinaldo, MDBurlingame, CA1306811906
- Susan Ahern, D.O.Ventura, CA1508156597
- Scott Ahl, D.O.Huntington Beach, CA1558674523
- Sheila Ahmadi, MDLos Angeles, CA1194800094
Common questions
What is Jennifer Casey's NPI number?
Jennifer Casey's National Provider Identifier (NPI) is 1750524575, issued on Apr 8, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer Casey located?
The NPPES record lists a practice address at 20101 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (510) 204-1844. Providers update this record themselves, so call before visiting.
How can I verify Jennifer Casey's license?
NPPES lists California license number 20A11524, 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 Jennifer Casey prescribe under Medicare Part D?
In 2024, Jennifer Casey had 728 Medicare Part D claims for 111 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,739. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.