DAVID A CHAPPELL MD, MEDICAL CORPORATION
NPI 1821267162
Internal Medicine - Endocrinology, Diabetes & Metabolism in Petaluma, CA
About David A Chappell Md, Medical Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DAVID A CHAPPELL MD, MEDICAL CORPORATION (NPI 1821267162) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Petaluma, California and active in the NPI registry since February 2008. The organization holds a CLIA Waiver certificate valid through June 18, 2028 and lists David Chappell, Doctor, 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)
David A Chappell Md, Medical Corporation 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 David A Chappell MD, Medical Corporation, 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.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 05D0947611
David Chappell MD Medical Corporation · Petaluma, CAFrequently 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 David A Chappell MD, Medical Corporation's NPI number?
The NPI number for David A Chappell MD, Medical Corporation is 1821267162. It was assigned to this organization in the NPPES registry on February 20, 2008.
Where is David A Chappell MD, Medical Corporation located?
David A Chappell MD, Medical Corporation is located at 141 Lynch Creek Way Suite A, Petaluma, CA 94954. The listed phone number is (707) 762-0001.
What is David A Chappell MD, Medical Corporation's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is David A Chappell MD, Medical Corporation enrolled in Medicare?
Yes. David A Chappell MD, Medical Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through David A Chappell MD, Medical Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Endocrinology) reassigns their Medicare billing to David A Chappell MD, Medical Corporation. 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.
Does David A Chappell MD, Medical Corporation hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 05D0947611) is associated with this NPI, valid through June 18, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for David A Chappell MD, Medical Corporation was last updated on February 20, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# David A Chappell Md, Medical Corporation · NPI 1821267162
Endocrinology, Diabetes & Metabolism organization in Petaluma, California. Organization record, active in the CMS NPPES registry since February 20, 2008.
## Identity
- **NPI:** 1821267162 (Entity type: Organization)
- **Enumerated:** February 20, 2008
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **Organization subpart:** No
- **Authorized official:** David Chappell, DOCTOR
## Practice location
- **Address:** 141 LYNCH CREEK WAY, SUITE A, Petaluma, CA 94954-2341
- **Phone:** (707) 762-0001 · **Fax:** (707) 765-0666
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Endocrinology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 20, 2008
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1821267162) · Data from the CMS NPPES public registry.