Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Barbara Cunningham Buettner, RN

Obstetrics & Gynecology Nurse Practitioner in San Ramon, CA · enumerated 2011.

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

National Provider Identifier

1689963001

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Registry record

Entity type Individual (Type 1)

Name Barbara Cunningham Buettner

Credential RN

Sex Female

Practice address San Ramon, CA, 94583

Phone (925) 327-1500

Fax (925) 327-1900

Enumeration date Apr 6, 2011

Last updated in NPPES Apr 12, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363LX0001X Obstetrics & Gynecology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 492292 (CA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

Other identifiers

Identifier	Type	State	Issuer
10991	Other	CA	NURSE PRACTITIONER LICENSE#
492292	Other	CA	REGISTERED NURSE LICENSE

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

Is NPI 1689963001 active?

Yes, as of the latest NPPES snapshot, NPI 1689963001 is active (record last updated 2011-04-12).

How do I verify Barbara Buettner's NPI record?

Cross-check NPI 1689963001 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Mark Lollar, M.D. Inc Specialist · San Ramon, CA NPI 1558676569 Patrick A Dawkins, M.D., Inc. Specialist · San Ramon, CA NPI 1003106428

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-12.