DR. BARBARA R SOMMER MD
NPI 1881729093
Psychiatry & Neurology - Psychiatry in Palo Alto, CA
About Dr. Barbara R Sommer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BARBARA R SOMMER MD (NPI 1881729093) is an individual psychiatry provider in Palo Alto, California, licensed in California (G54905) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of New York Medical College (1979).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Barbara R Sommer Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Barbara Sommer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94304 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PALO ALTO, CA 94304
PALO ALTO, CA 94304
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Barbara Sommer's NPI number?
The NPI number for Barbara Sommer is 1881729093. It was assigned to this individual provider in the NPPES registry on February 21, 2007.
Where is Barbara Sommer located?
Barbara Sommer practices at 401 Quarry Rd Room 2338, Palo Alto, CA 94304. The listed phone number is (650) 723-8567.
What is Barbara Sommer's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Barbara Sommer enrolled in Medicare?
Yes. Barbara Sommer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Barbara Sommer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Barbara Sommer reassigns Medicare benefits to 2 organizations: Lpch Medical Group Div Of Lucile (Palo Alto, CA) and Stanford Health Care (Stanford, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Barbara Sommer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Barbara Sommer was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Barbara R Sommer, MD · NPI 1881729093
Psychiatry physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since February 21, 2007.
## Identity
- **NPI:** 1881729093 (Entity type: Individual)
- **Enumerated:** February 21, 2007
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** G54905 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 401 QUARRY RD, ROOM 2338, Palo Alto, CA 94304-1419
- **Phone:** (650) 723-8567 · **Fax:** (650) 725-3762
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); Stanford Health Care (NPI 1437292927, Stanford, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 1979
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN A52825 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1881729093) · Data from the CMS NPPES public registry.