KATHERINE CHAKRABARTI MD
NPI 1801245543
Internal Medicine - Rheumatology in Ann Arbor, MI
About Katherine Chakrabarti Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE CHAKRABARTI MD (NPI 1801245543) is an individual rheumatology provider in Ann Arbor, Michigan, licensed in Michigan (4351027915) and active in the NPI registry since June 2016. She is enrolled in Medicare PECOS, is affiliated with Spectrum Health United Hospital, and is a graduate of Beaumont Hospital Medial College - Nlg (2016).
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
Katherine Chakrabarti 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 Katherine Chakrabarti reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ann Arbor, MI 48108
- Reassigned Medicare billing, Michigan enrollment
- 2,377 clinicians in this Medicare group
Byron Center, MI 49315
- Reassigned Medicare billing, Michigan enrollment
- 737 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 2
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spectrum Health United Hospital
Acute Care Hospitals · Greenville, MISpectrum Health
Acute Care Hospitals · Grand Rapids, MIMercy Health Saint Mary's
Acute Care Hospitals · Grand Rapids, MITrinity Health Muskegon Hospital
Acute Care Hospitals · Muskegon, MIUniversity Of Michigan Health - West
Acute Care Hospitals · Wyoming, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48108 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 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ANN ARBOR, MI 48108
ANN ARBOR, MI 48108
ANN ARBOR, MI 48108
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 Katherine Chakrabarti's NPI number?
The NPI number for Katherine Chakrabarti is 1801245543. It was assigned to this individual provider in the NPPES registry on June 3, 2016.
Where is Katherine Chakrabarti located?
Katherine Chakrabarti practices at 3621 S State St, Ann Arbor, MI 48108. The listed phone number is (734) 647-5299.
What is Katherine Chakrabarti's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Katherine Chakrabarti enrolled in Medicare?
Yes. Katherine Chakrabarti 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 Katherine Chakrabarti's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Chakrabarti reassigns Medicare benefits to 2 organizations: Regents Of The University Of Michigan (Ann Arbor, MI) and Advantage Health Saint Mary's Medical Group (Byron Center, MI). 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 Katherine Chakrabarti's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Katherine Chakrabarti accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list Katherine Chakrabarti 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 Katherine Chakrabarti affiliated with any hospitals?
According to CMS data, Katherine Chakrabarti is affiliated with Spectrum Health United Hospital, Spectrum Health, Mercy Health Saint Mary's, Trinity Health Muskegon Hospital and University Of Michigan Health - West.
When was this NPI record last updated?
The NPPES record for Katherine Chakrabarti was last updated on August 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Katherine Chakrabarti, MD · NPI 1801245543
Rheumatology physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since June 3, 2016.
## Identity
- **NPI:** 1801245543 (Entity type: Individual)
- **Enumerated:** June 3, 2016
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** 4351027915 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 3621 S STATE ST, Ann Arbor, MI 48108-1633
- **Phone:** (734) 647-5299
## 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): Regents Of The University Of Michigan (NPI 1770508350, Ann Arbor, MI); Advantage Health Saint Mary's Medical Group (NPI 1003515008, Byron Center, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Beaumont Hospital Medial College - Nlg, class of 2016
## Record status
- **NPPES last updated:** August 12, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1801245543) · Data from the CMS NPPES public registry.