JULIAN HARDY MCLAIN MD
NPI 1063916591
Internal Medicine - Hematology & Oncology in San Mateo, CA
About Julian Hardy Mclain Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JULIAN HARDY MCLAIN MD (NPI 1063916591) is an individual hematology & oncology provider in San Mateo, California, licensed in California (A164372) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, maintains a secondary practice location in Los Angeles, and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Julian Hardy Mclain 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 Julian Mclain reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 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 4
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94401 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.
SAN MATEO, CA 94401
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 Julian Mclain's NPI number?
The NPI number for Julian Mclain is 1063916591. It was assigned to this individual provider in the NPPES registry on March 20, 2018.
Where is Julian Mclain located?
Julian Mclain practices at 50 S San Mateo Dr, San Mateo, CA 94401. The listed phone number is (650) 696-5420.
What is Julian Mclain's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Julian Mclain enrolled in Medicare?
Yes. Julian Mclain 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 Julian Mclain's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Julian Mclain reassigns Medicare benefits to Sutter Bay Medical Foundation (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 Julian Mclain'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 Julian Mclain was last updated on August 5, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Julian Hardy Mclain, MD · NPI 1063916591
Hematology & Oncology physician in San Mateo, California. Individual provider, active in the CMS NPPES registry since March 20, 2018.
## Identity
- **NPI:** 1063916591 (Entity type: Individual)
- **Enumerated:** March 20, 2018
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** A164372 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 50 S SAN MATEO DR, San Mateo, CA 94401-3857
- **Phone:** (650) 696-5420
## 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:** Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** August 5, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1063916591) · Data from the CMS NPPES public registry.