HENRY ISAAC NESIS MD
NPI 1881639383
Anesthesiology in Walnut Creek, CA
About Henry Isaac Nesis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HENRY ISAAC NESIS MD (NPI 1881639383) is an individual anesthesiology provider in Walnut Creek, California, licensed in California (G65892) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Un Of California, Irvine, College Of Medicine (1986).
NPPES Registry Identity
Specialties & Licenses
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 (PECOS)
Henry Isaac Nesis Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Henry Nesis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Danville, CA 94526
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Salim M. Shelby MD A Professional Corporation
- 15 clinicians in this Medicare group
San Ramon, CA 94583
- Reassigned Medicare billing, California enrollment
- 27 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 3
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.
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.
Reported Quality Measures
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.
WALNUT CREEK, CA 94598
WALNUT CREEK, CA 94598
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 Henry Nesis's NPI number?
The NPI number for Henry Nesis is 1881639383. It was assigned to this individual provider in the NPPES registry on June 18, 2006.
Where is Henry Nesis located?
Henry Nesis practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. The listed phone number is (925) 939-3000.
What is Henry Nesis's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Henry Nesis enrolled in Medicare?
Yes. Henry Nesis is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Henry Nesis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Henry Nesis reassigns Medicare benefits to 2 organizations: Executive Gi Services (Danville, CA) and Pontine Incorporated (San Ramon, CA). 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 Henry Nesis'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 Henry Nesis 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.
# Henry Isaac Nesis, MD · NPI 1881639383
Anesthesiology physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since June 18, 2006.
## Identity
- **NPI:** 1881639383 (Entity type: Individual)
- **Enumerated:** June 18, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** G65892 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1601 YGNACIO VALLEY RD, Walnut Creek, CA 94598-3122
- **Phone:** (925) 939-3000 · **Fax:** (925) 947-5286
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Executive Gi Services (NPI 1669730339, Danville, CA); Pontine Incorporated (NPI 1053757609, San Ramon, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Un Of California, Irvine, College Of Medicine, class of 1986
## Record status
- **NPPES last updated:** July 13, 2026
- **Other identifiers:** Medicaid 00G658920 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1881639383) · Data from the CMS NPPES public registry.