Christopher David Vercammen-Grandjean, MD
Internal Medicine Physician · Orange, CA
Christopher David Vercammen-Grandjean, MD is an internal medicine physician with a practice address in Orange, California, and NPI 1942543699, issued on Apr 1, 2013. Check the license (California A135720, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christopher David Vercammen-Grandjean
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A135720 CA
Self-reported in NPPES; status is on the state search - Practice location
- 563 S Kensington RD, Orange, CA 92869
- Phone
- (619) 865-9156
- Enumerated
- Apr 1, 2013
- Record last updated
- Jul 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20190207000665); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Christopher David Vercammen-Grandjean in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A135720Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average internal medicine physician in 2024
8,130 Medicare Part D claims for 647 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 185 claims were for opioids.
Most prescribed
- Atorvastatin Calcium411 claims
- Levothyroxine Sodium304 claims
- Amlodipine Besylate291 claims
- Losartan Potassium233 claims
- Lisinopril207 claims
- Rosuvastatin Calcium198 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- J M Geiss DO ApcSanta Ana, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christopher David Vercammen-Grandjean among 17,696 internal medicine physician records in California
Christopher David Vercammen-Grandjean, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 11,065 with a school on file
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
187 internal medicine physician records list a practice address in Orange
They are 187 of the 13,245 NPPES records with a practice address in Orange, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Orange → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Aladean Abdrabbo, M.D.Orange, CA 928691578905675
- Saif Al Yaseen, M.D.Orange, CA 928691356684096
- Jay Amin, MDOrange, CA 928691568564193
- Laura Cho, M.D.Orange, CA 928691982790820
- Kathleen Glaspy, M.D.Orange, CA 928691134311186
- John Godes, MDOrange, CA 928691730330572
- Yio-Fan Hsu, M.D.Orange, CA 928691588989529
- Graciela Imbastari, MDOrange, CA 928691801809983
Common questions
What is Christopher David Vercammen-Grandjean, MD's NPI number?
Christopher David Vercammen-Grandjean, MD's National Provider Identifier (NPI) is 1942543699, issued on Apr 1, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Christopher David Vercammen-Grandjean, MD located?
The NPPES record lists a practice address at 563 S Kensington RD, Orange, CA, 92869. Phone: (619) 865-9156. Providers update this record themselves, so call before visiting.
How can I verify Christopher David Vercammen-Grandjean, MD's license?
NPPES lists California license number A135720, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Christopher David Vercammen-Grandjean, MD prescribe under Medicare Part D?
In 2024, Christopher David Vercammen-Grandjean, MD had 8,130 Medicare Part D claims for 647 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.