Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Clemens Martin Grosskinsky, PHD, MD

Reproductive Endocrinology Physician in Walnut Creek, CA · enumerated 2005 · practices at Kaiser Medical Offices.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1235128315

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Clemens Martin Grosskinsky

Credential PHD, MD

Sex Male

Practice address 320 Lennon Ln, Lassen Building, 2nd Floor, Suite 5b, Walnut Creek, CA, 94598

Phone (925) 906-2329

Fax (925) 906-4870

Enumeration date Oct 20, 2005

Last updated in NPPES Dec 14, 2021

Taxonomy & licenses

207VE0102X Reproductive Endocrinology Physician Allopathic & Osteopathic Physicians · License 35066572G (OH) Secondary

207VE0102X Reproductive Endocrinology Physician Allopathic & Osteopathic Physicians · License G87868 (CA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
0264235	Medicaid	OH	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Clemens Grosskinsky practice?

The practice location on file with NPPES is in Walnut Creek, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Clemens Grosskinsky?

The National Provider Identifier (NPI) for Clemens Grosskinsky is 1235128315, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-14.