DR. DAVID CONG TIAN M.D.
NPI 1427390186
Internal Medicine in Oakland, CA
About Dr. David Cong Tian M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DAVID CONG TIAN M.D. (NPI 1427390186) is an individual internal medicine provider in Oakland, California, licensed in California (A134437) and active in the NPI registry since March 2013. He is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2013).
NPPES Registry Identity
Specialties & Licenses 2
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. David Cong Tian M.d. 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 Reassignment
Medicare enrollment records show David Tian reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94107
- Reassigned Medicare billing, California enrollment
- 1,573 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94602 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.
Referred Medical Equipment & Supplies CMS DME claims 3
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.
OAKLAND, CA 94602
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 David Tian's NPI number?
The NPI number for David Tian is 1427390186. It was assigned to this individual provider in the NPPES registry on March 20, 2013.
Where is David Tian located?
David Tian practices at 1411 E 31st St, Oakland, CA 94602. The listed phone number is (510) 437-5039.
What is David Tian's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is David Tian enrolled in Medicare?
Yes. David Tian 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 organization bills Medicare for David Tian's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Tian reassigns Medicare benefits to City & County Of San Francisco (San Francisco, 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 David Tian'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 David Tian was last updated on October 1, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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. David Cong Tian, M.D. · NPI 1427390186
Internal Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since March 20, 2013.
## Identity
- **NPI:** 1427390186 (Entity type: Individual)
- **Enumerated:** March 20, 2013
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A134437 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1411 E 31ST ST, Oakland, CA 94602-1092
- **Phone:** (510) 437-5039 · **Fax:** (510) 437-5134
## 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:** City & County Of San Francisco (NPI 1568923894, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2013
## Record status
- **NPPES last updated:** October 1, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1427390186) · Data from the CMS NPPES public registry.