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About this NPIWhat this record shows.
NPI 1881640423 is registered to Ruth Ann Crystal, MD, A Professional Corporation, a healthcare organisation classified as "Obstetrics & Gynecology" and located at 3200 Middlefield Rd, Suite C in Palo Alto, California. The organisation's authorised official is Ruth Crystal. The organisation has been enumerated in the NPI registry since 2006.
Provider type
Organisation (Type 2)
Status
Active
Enumerated
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The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Ruth Ann Crystal, MD, A Professional Corporation accepts. To confirm in-network status with your specific health plan, contact Ruth Ann Crystal, MD, A Professional Corporation directly at (650) 858-6800.
Frequently asked
Yes. NPI 1881640423 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Obstetricians and Gynecologists (OB/GYNs) provide medical and surgical care for the female reproductive system, including pregnancy, childbirth, and gynecologic conditions.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (650) 858-6800.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Ruth Ann Crystal, MD, A Professional Corporation is a Type-2 organisational NPI.
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