DR. DANH THANH DAN M.D.
NPI 1790917631
Internal Medicine in Garden Grove, CA
About Dr. Danh Thanh Dan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DANH THANH DAN M.D. (NPI 1790917631) is an individual internal medicine provider in Garden Grove, California, licensed in California (A112628) and active in the NPI registry since August 2009. He is enrolled in Medicare PECOS and is a graduate of Medical College Of Wisconsin (2008).
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
Dr. Danh Thanh Dan 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 Danh Dan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fullerton, CA 92833
- 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 92840 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Danh Dan's NPI number?
The NPI number for Danh Dan is 1790917631. It was assigned to this individual provider in the NPPES registry on August 11, 2009.
Where is Danh Dan located?
Danh Dan practices at 12688 Chapman Ave Suite 3116, Garden Grove, CA 92840. The listed phone number is (714) 697-9347.
What is Danh Dan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Danh Dan enrolled in Medicare?
Yes. Danh Dan 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 Danh Dan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Danh Dan reassigns Medicare benefits to Southern California Permanente Medical Group (Fullerton, 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 Danh Dan'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 Danh Dan was last updated on November 18, 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.
# Dr. Danh Thanh Dan, M.D. · NPI 1790917631
Internal Medicine physician in Garden Grove, California. Individual provider, active in the CMS NPPES registry since August 11, 2009.
## Identity
- **NPI:** 1790917631 (Entity type: Individual)
- **Enumerated:** August 11, 2009
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A112628 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 12688 CHAPMAN AVE, SUITE 3116, Garden Grove, CA 92840-4041
- **Phone:** (714) 697-9347 · **Fax:** (714) 829-1388
## 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 1336556059, Fullerton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Wisconsin, class of 2008
## Record status
- **NPPES last updated:** November 18, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1790917631) · Data from the CMS NPPES public registry.