GREGORY MING TIAO MD
NPI 1083794036
Surgery in Palo Alto, CA
About Gregory Ming Tiao Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY MING TIAO MD (NPI 1083794036) is an individual surgery provider in Palo Alto, California, licensed in California (G84888) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Cincinnati, and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (1990).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 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
Gregory Ming Tiao 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
3Medicare enrollment records show Gregory Tiao reassigns Medicare billing to 3 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
Cincinnati, OH 45229
- Reassigned Medicare billing, Ohio enrollment
- 2,080 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.
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 Gregory Tiao's NPI number?
The NPI number for Gregory Tiao is 1083794036. It was assigned to this individual provider in the NPPES registry on October 16, 2006.
Where is Gregory Tiao located?
Gregory Tiao practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Gregory Tiao's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Gregory Tiao enrolled in Medicare?
Yes. Gregory Tiao 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 Gregory Tiao's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Tiao reassigns Medicare benefits to 3 organizations: Lpch Medical Group Div Of Lucile (Palo Alto, CA), Stanford Health Care (Stanford, CA) and Children's Hospital Medical Center (Cincinnati, OH). 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 Gregory Tiao'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 Gregory Tiao was last updated on December 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.
# Gregory Ming Tiao, MD · NPI 1083794036
Surgery physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since October 16, 2006.
## Identity
- **NPI:** 1083794036 (Entity type: Individual)
- **Enumerated:** October 16, 2006
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** G84888 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## 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:** 3 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); Children's Hospital Medical Center (NPI 1609915784, Cincinnati, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Illinois College Of Med, class of 1990
## Record status
- **NPPES last updated:** December 15, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1083794036) · Data from the CMS NPPES public registry.