DR. TIFFANY SIN DO
NPI 1982196184
Emergency Medicine in Montclair, CA
About Dr. Tiffany Sin Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TIFFANY SIN DO (NPI 1982196184) is an individual emergency medicine provider in Montclair, California, licensed in California (20A19117) and active in the NPI registry since June 2018. She is enrolled in Medicare PECOS and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses
Group Practice 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
Dr. Tiffany Sin Do 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
4Medicare enrollment records show Tiffany Sin reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Montclair, CA 91763
- Reassigned Medicare billing, California enrollment
- 98 clinicians in this Medicare group
Chino, CA 91710
- Reassigned Medicare billing, California enrollment
- 99 clinicians in this Medicare group
Chino Hills, CA 91709
- Reassigned Medicare billing, California enrollment
- 5,228 clinicians in this Medicare group
San Dimas, CA 91773
- Reassigned Medicare billing, California enrollment
- 75 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 91763 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 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MONTCLAIR, CA 91763
MONTCLAIR, CA 91763
MONTCLAIR, CA 91763
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 Tiffany Sin's NPI number?
The NPI number for Tiffany Sin is 1982196184. It was assigned to this individual provider in the NPPES registry on June 4, 2018.
Where is Tiffany Sin located?
Tiffany Sin practices at 5000 San Bernardino St, Montclair, CA 91763. The listed phone number is (909) 625-5411.
What is Tiffany Sin's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Tiffany Sin enrolled in Medicare?
Yes. Tiffany Sin 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 Tiffany Sin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tiffany Sin reassigns Medicare benefits to 4 organizations: Montclair Emergency Medical Associates (Montclair, CA), Chino Emergency Medical Associates, Inc. (Chino, CA), Southern California Permanente Medical Group (Chino Hills, CA) and San Dimas Emergency Medical Associates Inc. (San Dimas, 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 Tiffany Sin'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 Tiffany Sin was last updated on October 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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. Tiffany Sin, DO · NPI 1982196184
Emergency Medicine physician in Montclair, California. Individual provider, active in the CMS NPPES registry since June 4, 2018.
## Identity
- **NPI:** 1982196184 (Entity type: Individual)
- **Enumerated:** June 4, 2018
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 20A19117 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 5000 SAN BERNARDINO ST, Montclair, CA 91763-2326
- **Phone:** (909) 625-5411
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Montclair Emergency Medical Associates (NPI 1316044696, Montclair, CA); Chino Emergency Medical Associates, Inc. (NPI 1013282029, Chino, CA); Southern California Permanente Medical Group (NPI 1396287082, Chino Hills, CA); San Dimas Emergency Medical Associates Inc. (NPI 1720239460, San Dimas, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** October 27, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1982196184) · Data from the CMS NPPES public registry.