AILIE CHUA TAN MD
NPI 1699395053
Internal Medicine in Worcester, MA
About Ailie Chua Tan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AILIE CHUA TAN MD (NPI 1699395053) is an individual internal medicine provider in Worcester, Massachusetts, licensed in Massachusetts (1018883) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS, is affiliated with Umass Memorial Medical Center/university Campus, and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
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
Ailie Chua Tan 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 Ailie Tan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Worcester, MA 01655
- Reassigned Medicare billing, Massachusetts enrollment
- 2,902 clinicians in this Medicare group
Marlborough, MA 01752
- Reassigned Medicare billing, Massachusetts enrollment
- 88 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 3
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Umass Memorial Medical Center/University Campus
Acute Care Hospitals · Worcester, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01605 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.
WORCESTER, MA 01605
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 Ailie Tan's NPI number?
The NPI number for Ailie Tan is 1699395053. It was assigned to this individual provider in the NPPES registry on April 25, 2020.
Where is Ailie Tan located?
Ailie Tan practices at 119 Belmont St, Worcester, MA 01605. The listed phone number is (508) 334-8942.
What is Ailie Tan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ailie Tan enrolled in Medicare?
Yes. Ailie Tan 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 Ailie Tan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ailie Tan reassigns Medicare benefits to 2 organizations: Umass Memorial Medical Group Inc (Worcester, MA) and Marlborough Hospitalist Group, PLLC (Marlborough, MA). 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 Ailie Tan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ailie Tan accept?
Health plans from Taro Health list Ailie Tan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Ailie Tan affiliated with any hospitals?
According to CMS data, Ailie Tan is affiliated with Umass Memorial Medical Center/University Campus.
When was this NPI record last updated?
The NPPES record for Ailie Tan was last updated on May 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Ailie Chua Tan, MD · NPI 1699395053
Internal Medicine physician in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since April 25, 2020.
## Identity
- **NPI:** 1699395053 (Entity type: Individual)
- **Enumerated:** April 25, 2020
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 1018883 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 119 BELMONT ST, Worcester, MA 01605-2903
- **Phone:** (508) 334-8942 · **Fax:** (508) 334-6490
## 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): Umass Memorial Medical Group Inc (NPI 1760445373, Worcester, MA); Marlborough Hospitalist Group, PLLC (NPI 1316639321, Marlborough, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** May 21, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1699395053) · Data from the CMS NPPES public registry.