THOMAS DIAMANT M D INC
NPI 1013752823
Internal Medicine - Pulmonary Disease in Costa Mesa, CA
About Thomas Diamant M D Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THOMAS DIAMANT M D INC (NPI 1013752823) is a healthcare organization registered as a pulmonary disease in Costa Mesa, California and active in the NPI registry since June 2024. The organization lists Thomas J Diamant, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Thomas Diamant M D Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Thomas Diamant M D Inc, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Thomas Diamant M D Inc's NPI number?
The NPI number for Thomas Diamant M D Inc is 1013752823. It was assigned to this organization in the NPPES registry on June 25, 2024.
Where is Thomas Diamant M D Inc located?
Thomas Diamant M D Inc is located at 136 Broadway, Costa Mesa, CA 92627. The listed phone number is (949) 873-5537.
What is Thomas Diamant M D Inc's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Thomas Diamant M D Inc enrolled in Medicare?
Yes. Thomas Diamant M D Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Thomas Diamant M D Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Pulmonary Disease) reassigns their Medicare billing to Thomas Diamant M D Inc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Thomas Diamant M D Inc was last updated on August 7, 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.
# Thomas Diamant M D Inc · NPI 1013752823
Pulmonary Disease organization in Costa Mesa, California. Organization record, active in the CMS NPPES registry since June 25, 2024.
## Identity
- **NPI:** 1013752823 (Entity type: Organization)
- **Enumerated:** June 25, 2024
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **Organization subpart:** No
- **Authorized official:** Thomas Diamant, OWNER
## Practice location
- **Address:** 136 BROADWAY, Costa Mesa, CA 92627-2818
- **Phone:** (949) 873-5537
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Pulmonary Disease) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 7, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1013752823) · Data from the CMS NPPES public registry.