MARY LINPEI GUAN
NPI 1346703089
Internal Medicine - Rheumatology in New York, NY
About Mary Linpei Guan NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY LINPEI GUAN (NPI 1346703089) is an individual rheumatology provider in New York, New York, licensed in New York (316220) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, is affiliated with Nyu Langone Hospitals, and is a graduate of University Of Michigan Medical School (2019).
NPPES Registry Identity
Specialties & Licenses 3
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
Mary Linpei Guan 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 Mary Guan 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 10016
- Reassigned Medicare billing, New York enrollment
- 616 clinicians in this Medicare group
Boynton Beach, FL 33426
- Reassigned Medicare billing, New York enrollment
- 7,712 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Nyu Langone Hospitals
Acute Care Hospitals · New York, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10016 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.
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 10016
NEW YORK, NY 10016
NEW YORK, NY 10016
NEW YORK, NY 10016
NEW YORK, NY 10016
NEW YORK, NY 10016
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 Mary Guan's NPI number?
The NPI number for Mary Guan is 1346703089. It was assigned to this individual provider in the NPPES registry on April 10, 2019.
Where is Mary Guan located?
Mary Guan practices at 550 1st Ave, New York, NY 10016. The listed phone number is (212) 263-5506.
What is Mary Guan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Mary Guan enrolled in Medicare?
Yes. Mary Guan 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 Mary Guan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Guan reassigns Medicare benefits to 2 organizations: Nyu Langone Hospitals (New York, NY) and New York University (Boynton Beach, FL). 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 Mary Guan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mary Guan affiliated with any hospitals?
According to CMS data, Mary Guan is affiliated with Nyu Langone Hospitals.
When was this NPI record last updated?
The NPPES record for Mary Guan was last updated on May 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Mary Linpei Guan · NPI 1346703089
Rheumatology physician in New York, New York. Individual provider, active in the CMS NPPES registry since April 10, 2019.
## Identity
- **NPI:** 1346703089 (Entity type: Individual)
- **Enumerated:** April 10, 2019
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** 316220 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 550 1ST AVE, New York, NY 10016-6402
- **Phone:** (212) 263-5506
## 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): Nyu Langone Hospitals (NPI 1790975944, New York, NY); New York University (NPI 1285826438, Boynton Beach, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2019
## Record status
- **NPPES last updated:** May 15, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1346703089) · Data from the CMS NPPES public registry.