GREGORY MING TIAO MD
NPI 1083794036
Surgery in Palo Alto, CA

Q: 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.

Q: What is Gregory Tiao's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: 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 7 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.

Active since October 16, 2006PECOS EnrolledAccepts Medicare Assignment

725 WELCH RD, PALO ALTO, CA 94304(650) 497-8000 Get Directions Write a Review

NPPES record last updated: December 15, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 15, 2025, Mar 4, 2019, Jan 11, 2019 and 1 more (4 updates tracked since 2018).

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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

NPI1083794036

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameGREGORY MING TIAOCredential: MD

Location Address725 WELCH RDPalo Alto, CA 94304-1601

Mailing Address725 Welch RdPalo Alto, CA 94304-1601 · (650) 497-8000

Phone(650) 497-8000

Sole ProprietorNo

Medical School CMSUniversity Of Illinois College Of Med (chi/peor/rock/chm-urb)Graduated 1990

Enumeration DateOctober 16, 2006

Last NPPES UpdateDecember 15, 20254 updates tracked since enumeration

NPPES CertifiedDecember 15, 2025

✔ NPI 1083794036 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in CA · G84888

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Also ListedTransplant SurgeryTaxonomy 204F00000X · License G84888 (CA)

Also ListedSurgery · Pediatric SurgeryTaxonomy 2086S0120X · License 52167 (KY), 01081810A (IN), G84888 (CA), 35.065006 (OH)

725 WELCH RD, Palo Alto, CA 94304

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Secondary Practice Location 1

Location 13333 Burnet Ave, ML 2023Cincinnati, OH 45229-3039 · Phone (513) 636-4371 · Fax (513) 636-7657

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource, MedMutual.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

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.

PECOS PAC ID840464640

PECOS Enrollment IDI20111112000072, I20200102000420

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.

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.

New Patient

$106.47 typical visit price

range $70.37 – $206.04

Typical copayment $26.61 (range $17.59 – $51.51)

Most-billed visit code 99203

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.

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.

EIRI INENAGA MS, OTR/L

Occupational Therapist (Pediatrics)