1. Home
  2. Directory
  3. California
  4. Palo Alto
  5. Obstetrics Gynecology
  6. NPI Profile

DENNIS SIEGLER
NPI 1174687743
Obstetrics & Gynecology in Palo Alto, CA

Active since December 20, 2006PECOS Enrolled
80.58/100
CMS Quality Rating
795 EL CAMINO REAL, PALO ALTO, CA 94301(650) 321-4121 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Dennis Siegler NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DENNIS SIEGLER (NPI 1174687743) is an individual obstetrics & gynecology provider in Palo Alto, California, licensed in California (G69589) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1174687743
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDENNIS SIEGLER
Location Address795 EL CAMINO REALPalo Alto, CA 94301-2302
Mailing AddressPo Box 10000Palo Alto, CA 94303-0985
Phone(650) 321-4121
Sole ProprietorNo
Enumeration DateDecember 20, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1174687743 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · G69589
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
795 EL CAMINO REAL, Palo Alto, CA 94301
Open in Google Maps ↗

Other Identifiers 1

Medicare UPINF67531CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dennis Siegler is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Dennis Siegler reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Santa Clara
1.5 mi
Mental Health (Including Community Mental Health Center)
231 GRANT AVENUE
Palo Alto, CA 94306
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1588721500 (California), NPI 1629301346 (California)
  • 2,460 clinicians in this Medicare group
NPI 1144330614 (650) 321-5545

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 94301 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$86.56 typical visit price
range $23.96 – $169.60
Typical copayment $21.64 (range $5.99 – $42.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

80.58/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality67.43
Promoting Interoperability100
Improvement Activities40
Cost46.5

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.

DR. SHIRA BETH LIPTON M.D.
Dermatology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Santa Clara County (650) 853-2982
DR. KATHERINE A KWIATKOWSKI MD
Psychiatry & Neurology (Psychiatry)
795 EL CAMINO REAL
PALO ALTO, CA 94301
Santa Clara County (650) 853-2904
MS. HEATHER HUGHES ROSE PT
Physical Therapist
795 EL CAMINO REAL
PALO ALTO, CA 94301
Santa Clara County (707) 280-2417
CRYSTAL TSAI MS, RD
Dietitian, Registered
795 EL CAMINO REAL
PALO ALTO, CA 94301
Santa Clara County (650) 853-2961
RUTH ROTHMAN MD
Dermatology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Santa Clara County (650) 853-4865
WINONA TAN M.D.
Obstetrics & Gynecology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Santa Clara County (650) 853-2917
SHERRY HUANG MD
Family Medicine
795 EL CAMINO REAL
PALO ALTO, CA 94301
Santa Clara County (650) 853-2984
DR. JULIA MCKENZIE GABHART M.D.
Pediatrics
795 EL CAMINO REAL
PALO ALTO, CA 94301
Santa Clara County (650) 321-4121

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 Dennis Siegler's NPI number?

The NPI number for Dennis Siegler is 1174687743. It was assigned to this individual provider in the NPPES registry on December 20, 2006.

Where is Dennis Siegler located?

Dennis Siegler practices at 795 El Camino Real, Palo Alto, CA 94301. The listed phone number is (650) 321-4121.

What is Dennis Siegler's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Dennis Siegler enrolled in Medicare?

Yes. Dennis Siegler is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Dennis Siegler's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dennis Siegler reassigns Medicare benefits to County Of Santa Clara (Palo Alto, CA). The 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 Dennis Siegler'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 Dennis Siegler 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.