DR. ANDREA M TOM M.D.
NPI 1013980390
Internal Medicine - Endocrinology, Diabetes & Metabolism in San Carlos, CA
About Dr. Andrea M Tom M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANDREA M TOM M.D. (NPI 1013980390) is an individual endocrinology, diabetes & metabolism provider in San Carlos, California, licensed in California (A77143) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in Palo Alto, and is a graduate of Warren Alpert Medical School Of Brown University (2000).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 2
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. Andrea M Tom 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.
Medicare Billing Reassignment
Medicare enrollment records show Andrea Tom reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palo Alto, CA 94306
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1043354020 (California), NPI 1629301346 (California)
- 2,460 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 94070 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.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
SAN CARLOS, CA 94070
SAN CARLOS, CA 94070
SAN CARLOS, CA 94070
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 Andrea Tom's NPI number?
The NPI number for Andrea Tom is 1013980390. It was assigned to this individual provider in the NPPES registry on February 8, 2006.
Where is Andrea Tom located?
Andrea Tom practices at 301 Industrial Rd, San Carlos, CA 94070. The listed phone number is (650) 596-4030.
What is Andrea Tom's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Andrea Tom enrolled in Medicare?
Yes. Andrea Tom 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 Andrea Tom's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrea Tom reassigns Medicare benefits to County Of Santa Clara (Palo Alto, 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 Andrea Tom'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 Andrea Tom was last updated on May 28, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Dr. Andrea M Tom, M.D. · NPI 1013980390
Endocrinology, Diabetes & Metabolism physician in San Carlos, California. Individual provider, active in the CMS NPPES registry since February 8, 2006.
## Identity
- **NPI:** 1013980390 (Entity type: Individual)
- **Enumerated:** February 8, 2006
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** A77143 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 301 INDUSTRIAL RD, San Carlos, CA 94070-2603
- **Phone:** (650) 596-4030
## 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:** County Of Santa Clara (NPI 1144330614, Palo Alto, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Warren Alpert Medical School Of Brown University, class of 2000
## Record status
- **NPPES last updated:** May 28, 2020
- **Other identifiers:** Medicaid 00A771430 (CA); Medicaid 370419000 (MN)
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Source: [NPI Profile](https://npiprofile.com/npi/1013980390) · Data from the CMS NPPES public registry.