HANNAH SUNG HEE SIM MD
NPI 1811036510
Internal Medicine in Baldwin Park, CA
About Hannah Sung Hee Sim Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HANNAH SUNG HEE SIM MD (NPI 1811036510) is an individual internal medicine provider in Baldwin Park, California, licensed in California (A73398) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Other (1999).
NPPES Registry Identity
Specialties & Licenses
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
Hannah Sung Hee Sim 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 Reassignment
Medicare enrollment records show Hannah Sim reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Baldwin Park, CA 91706
- Reassigned Medicare billing, California enrollment
- 13,921 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 91706 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.
BALDWIN PARK, CA 91706
BALDWIN PARK, CA 91706
BALDWIN PARK, CA 91706
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 Hannah Sim's NPI number?
The NPI number for Hannah Sim is 1811036510. It was assigned to this individual provider in the NPPES registry on February 6, 2007.
Where is Hannah Sim located?
Hannah Sim practices at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706. The listed phone number is (626) 851-1011.
What is Hannah Sim's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Hannah Sim enrolled in Medicare?
Yes. Hannah Sim 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 Hannah Sim's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hannah Sim reassigns Medicare benefits to Southern California Permanente Medical Group (Baldwin Park, 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 Hannah Sim'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 Hannah Sim was last updated on December 2, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Hannah Sung Hee Sim, MD · NPI 1811036510
Internal Medicine physician in Baldwin Park, California. Individual provider, active in the CMS NPPES registry since February 6, 2007.
## Identity
- **NPI:** 1811036510 (Entity type: Individual)
- **Enumerated:** February 6, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A73398 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1011 BALDWIN PARK BLVD, Baldwin Park, CA 91706-5806
- **Phone:** (626) 851-1011
## 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:** Southern California Permanente Medical Group (NPI 1770515280, Baldwin Park, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1999
## Record status
- **NPPES last updated:** December 2, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1811036510) · Data from the CMS NPPES public registry.