Charles Weidmann, M.D.
NPI 1851372288 · Rheumatology Physician · Van Nuys, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Weidmann, M.D. is a Rheumatology Physician provider in Van Nuys, CA (NPI 1851372288).
Provider details
- NPI number
- 1851372288
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G048620 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
18,901 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Measurement of Antibody for Assessment of Autoimmune Disorder, Any Method86235 | 1,821 | $18 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,531 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,316 | $135 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,001 | $8 |
| Red Blood Cell Sedimentation Rate, to Detect Inflammation, Non-Automated85651 | 998 | $4 |
| Measurement C-Reactive Protein for Detection of Infection Or Inflammation86140 | 998 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 160 | 26 |
| Denosumabbrand: Prolia | 132 | 83 |
| Abatacept/Maltosebrand: Orencia | 121 | 13 |
| Gabapentin | 106 | 24 |
| Methotrexate Sodiumbrand: Methotrexate | 103 | 26 |
| Tocilizumabbrand: Actemra | 86 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$108 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-11
- Last updated
- 2015-01-22
Frequently asked questions
- What is Charles Weidmann's NPI number?
- Charles Weidmann's National Provider Identifier (NPI) is 1851372288, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Weidmann's specialty?
- Charles Weidmann is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Weidmann located?
- Charles Weidmann's practice location on file with NPPES is 15243 Vanowen St, Van Nuys, CA 91405-3649.
- What is Charles Weidmann's phone number?
- The practice phone number listed in the NPPES registry for Charles Weidmann is (818) 781-0232.
- Does Charles Weidmann accept Medicare?
- Charles Weidmann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Weidmann's NPI active?
- Yes — Charles Weidmann's NPI (1851372288) is active in the NPPES registry as of the last update on 2015-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.