FRANK Z DUAN MD
NPI 1679214399
Internal Medicine in New York, NY
About Frank Z Duan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FRANK Z DUAN MD (NPI 1679214399) is an individual internal medicine provider in New York, New York, licensed in New Jersey (25MA13183300) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS and is a graduate of Jefferson Medical College Of Thomas Jefferson University (2022).
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
Frank Z Duan 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 Reassignments
2Medicare enrollment records show Frank Duan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 769 clinicians in this Medicare group
Marlton, NJ 08053
- Reassigned Medicare billing, New Jersey enrollment
- 438 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 10028 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.
NEW YORK, NY 10028
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 Frank Duan's NPI number?
The NPI number for Frank Duan is 1679214399. It was assigned to this individual provider in the NPPES registry on April 5, 2022.
Where is Frank Duan located?
Frank Duan practices at 234 E 85th St, New York, NY 10028. The listed phone number is (212) 241-6585.
What is Frank Duan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Frank Duan enrolled in Medicare?
Yes. Frank Duan 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 Frank Duan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Frank Duan reassigns Medicare benefits to 2 organizations: Icahn School Of Medicine At Mount Sinai (New York, NY) and Kennedy Medical Group Practice, P.C. (Marlton, NJ). 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 Frank Duan'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 Frank Duan was last updated on August 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.
# Frank Z Duan, MD · NPI 1679214399
Internal Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since April 5, 2022.
## Identity
- **NPI:** 1679214399 (Entity type: Individual)
- **Enumerated:** April 5, 2022
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 25MA13183300 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 234 E 85TH ST, New York, NY 10028-3001
- **Phone:** (212) 241-6585 · **Fax:** (212) 824-2335
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Icahn School Of Medicine At Mount Sinai (NPI 1427493113, New York, NY); Kennedy Medical Group Practice, P.C. (NPI 1427350040, Marlton, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Jefferson Medical College Of Thomas Jefferson University, class of 2022
## Record status
- **NPPES last updated:** August 19, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1679214399) · Data from the CMS NPPES public registry.