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DR. SIBA PRASAD RAYCHAUDHURI M.D.
NPI 1821033275
Internal Medicine - Rheumatology in Palo Alto, CA

Active since June 19, 2006PECOS EnrolledAccepts Medicare Assignment
510 ASHTON AVE, PALO ALTO, CA 94306(650) 424-9147 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Siba Prasad Raychaudhuri M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. SIBA PRASAD RAYCHAUDHURI M.D. (NPI 1821033275) is an individual rheumatology provider in Palo Alto, California, licensed in California (A52869) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1983).

NPPES Registry Identity

NPI1821033275
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NameDR. SIBA PRASAD RAYCHAUDHURICredential: M.D.
Location Address510 ASHTON AVEPalo Alto, CA 94306-3607
Mailing Address510 Ashton AvePalo Alto, CA 94306-3607 · (650) 424-9147
Phone(650) 424-9147
Sole ProprietorNo
Medical School CMSOtherGraduated 1983
Enumeration DateJune 19, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1821033275 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in CA · A52869
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
510 ASHTON AVE, Palo Alto, CA 94306
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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

Dr. Siba Prasad Raychaudhuri M.d. 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.

PECOS PAC ID1456490036
PECOS Enrollment IDI20091120000703
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Siba Raychaudhuri reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Regents Of The Univ Of Ca
80 mi
Medical Microbiology
3146 TUPPER HALL
Davis, CA 95616
  • Reassigned Medicare billing, California enrollment
  • 2,570 clinicians in this Medicare group
NPI 1053304071 (530) 752-9402

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
23 services21 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
21 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94306 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Siba Raychaudhuri's NPI number?

The NPI number for Siba Raychaudhuri is 1821033275. It was assigned to this individual provider in the NPPES registry on June 19, 2006.

Where is Siba Raychaudhuri located?

Siba Raychaudhuri practices at 510 Ashton Ave, Palo Alto, CA 94306. The listed phone number is (650) 424-9147.

What is Siba Raychaudhuri's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Siba Raychaudhuri enrolled in Medicare?

Yes. Siba Raychaudhuri 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 Siba Raychaudhuri's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Siba Raychaudhuri reassigns Medicare benefits to Regents Of The Univ Of Ca (Davis, 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 Siba Raychaudhuri'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 Siba Raychaudhuri was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.