TIMOTHY LANG TAN M.D.
NPI 1023404910
Orthopaedic Surgery in Visalia, CA
About Timothy Lang Tan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIMOTHY LANG TAN M.D. (NPI 1023404910) is an individual orthopaedic surgery provider in Visalia, California, licensed in California (A167215) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (2014).
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
Timothy Lang Tan 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 Reassignments
3Medicare enrollment records show Timothy Tan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Porterville, CA 93257
- Reassigned Medicare billing, California enrollment
- 11 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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 4
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 93277 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
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 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
VISALIA, CA 93277
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 Timothy Tan's NPI number?
The NPI number for Timothy Tan is 1023404910. It was assigned to this individual provider in the NPPES registry on April 8, 2015.
Where is Timothy Tan located?
Timothy Tan practices at 2300 W Sunnyside Ave, Visalia, CA 93277. The listed phone number is (559) 731-2009.
What is Timothy Tan's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Timothy Tan enrolled in Medicare?
Yes. Timothy Tan 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 Timothy Tan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Tan reassigns Medicare benefits to 3 organizations: Porterville Community Physicians Inc (Porterville, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, 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 Timothy Tan'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 Timothy Tan was last updated on August 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Timothy Lang Tan, M.D. · NPI 1023404910
Orthopaedic Surgery physician in Visalia, California. Individual provider, active in the CMS NPPES registry since April 8, 2015.
## Identity
- **NPI:** 1023404910 (Entity type: Individual)
- **Enumerated:** April 8, 2015
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** A167215 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2300 W SUNNYSIDE AVE, Visalia, CA 93277-7287
- **Phone:** (559) 731-2009 · **Fax:** (866) 833-7251
## 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): Porterville Community Physicians Inc (NPI 1538195821, Porterville, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 2014
## Record status
- **NPPES last updated:** August 16, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1023404910) · Data from the CMS NPPES public registry.