ANANYA CHATTOPADHYAY MD
NPI 1487726147
Hospitalist in South San Francisco, CA
About Ananya Chattopadhyay Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANANYA CHATTOPADHYAY MD (NPI 1487726147) is an individual hospitalist provider in South San Francisco, California, licensed in California (A89793) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of Other (2000).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
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
Ananya Chattopadhyay 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 Reassignment
Medicare enrollment records show Ananya Chattopadhyay reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94116
- Reassigned Medicare billing, California enrollment
- 20,078 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 94080 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.
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
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 Ananya Chattopadhyay's NPI number?
The NPI number for Ananya Chattopadhyay is 1487726147. It was assigned to this individual provider in the NPPES registry on November 15, 2006. The provider is also known as Ananya Bandyopadhyay, Banerjee.
Where is Ananya Chattopadhyay located?
Ananya Chattopadhyay practices at 1200 El Camino Real, South San Francisco, CA 94080. The listed phone number is (650) 742-2000.
What is Ananya Chattopadhyay's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Ananya Chattopadhyay enrolled in Medicare?
Yes. Ananya Chattopadhyay 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 Ananya Chattopadhyay's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ananya Chattopadhyay reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, 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 Ananya Chattopadhyay'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 Ananya Chattopadhyay was last updated on January 10, 2022. 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.
# Ananya Chattopadhyay, MD · NPI 1487726147
Hospitalist physician in South San Francisco, California. Individual provider, active in the CMS NPPES registry since November 15, 2006.
## Identity
- **NPI:** 1487726147 (Entity type: Individual)
- **Enumerated:** November 15, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A89793 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1200 EL CAMINO REAL, South San Francisco, CA 94080-3208
- **Phone:** (650) 742-2000
## 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:** Permanente Medical Group Inc (NPI 1841373800, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** January 10, 2022
- **Other identifiers:** Medicaid 00A897930 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1487726147) · Data from the CMS NPPES public registry.