DORSEY MACHIR BASS MD
NPI 1275624991
Pediatrics - Pediatric Gastroenterology in Palo Alto, CA
About Dorsey Machir Bass Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DORSEY MACHIR BASS MD (NPI 1275624991) is an individual pediatric gastroenterology provider in Palo Alto, California, licensed in California (G62260) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
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 (PECOS)
Dorsey Machir Bass Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Dorsey Bass 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.
Referred Medical Equipment & Supplies CMS DME claims 4
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Dorsey Bass's NPI number?
The NPI number for Dorsey Bass is 1275624991. It was assigned to this individual provider in the NPPES registry on September 27, 2006.
Where is Dorsey Bass located?
Dorsey Bass practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 723-4000.
What is Dorsey Bass's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.
Is Dorsey Bass enrolled in Medicare?
Yes. Dorsey Bass is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Dorsey Bass's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dorsey Bass 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 Dorsey Bass'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 Dorsey Bass was last updated on April 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dorsey Machir Bass, MD · NPI 1275624991
Pediatric Gastroenterology physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since September 27, 2006.
## Identity
- **NPI:** 1275624991 (Entity type: Individual)
- **Enumerated:** September 27, 2006
- **Primary specialty:** Pediatrics - Pediatric Gastroenterology · taxonomy 2080P0206X
- **State license:** G62260 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 723-4000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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
## Record status
- **NPPES last updated:** April 10, 2024
- **Other identifiers:** Medicaid 00G622600 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1275624991) · Data from the CMS NPPES public registry.