Christopher Vercammen-Grandjean, MD
NPI 1942543699 · Internal Medicine Physician · Orange, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Vercammen-Grandjean, MD is a Internal Medicine Physician provider in Orange, CA (NPI 1942543699).
Provider details
- NPI number
- 1942543699
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A135720 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
447 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 314 | $99 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 52 | $140 |
| Administration of Influenza Virus VaccineG0008 | 26 | $35 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 16 | $98 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 14 | $121 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 154 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 411 | 137 |
| Levothyroxine Sodium | 304 | 82 |
| Amlodipine Besylate | 291 | 88 |
| Losartan Potassium | 233 | 77 |
| Lisinopril | 207 | 60 |
| Rosuvastatin Calcium | 198 | 59 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-01
- Last updated
- 2026-03-16
- Certified
- 2026-03-16
Frequently asked questions
- What is Christopher Vercammen-Grandjean's NPI number?
- Christopher Vercammen-Grandjean's National Provider Identifier (NPI) is 1942543699, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Vercammen-Grandjean's specialty?
- Christopher Vercammen-Grandjean is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Vercammen-Grandjean located?
- Christopher Vercammen-Grandjean's practice location on file with NPPES is 563 S Kensington Rd, Orange, CA 92869-5147.
- What is Christopher Vercammen-Grandjean's phone number?
- The practice phone number listed in the NPPES registry for Christopher Vercammen-Grandjean is (619) 865-9156.
- Does Christopher Vercammen-Grandjean accept Medicare?
- Christopher Vercammen-Grandjean is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Vercammen-Grandjean's NPI active?
- Yes — Christopher Vercammen-Grandjean's NPI (1942543699) is active in the NPPES registry as of the last update on 2026-03-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.