Jennifer Van Warmerdam, M.D.
NPI 1922232404 · Orthopaedic Surgery Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Van Warmerdam, M.D. is a Orthopaedic Surgery Physician provider in San Francisco, CA (NPI 1922232404).
Provider details
- NPI number
- 1922232404
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A96120 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 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
1,170 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 341 | $160 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 220 | $90 |
| X-Ray of Knee, 4 Or More Views73564 | 135 | $65 |
| X-Ray of Hip, 2-3 Views73502 | 84 | $64 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 80 | $271 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$48 across 3 records (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
- 2009-05-12
- Last updated
- 2023-09-08
- Certified
- 2023-09-08
Frequently asked questions
- What is Jennifer Van Warmerdam's NPI number?
- Jennifer Van Warmerdam's National Provider Identifier (NPI) is 1922232404, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Van Warmerdam's specialty?
- Jennifer Van Warmerdam is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Van Warmerdam located?
- Jennifer Van Warmerdam's practice location on file with NPPES is 1 Shrader St, San Francisco, CA 94117-1016.
- What is Jennifer Van Warmerdam's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Van Warmerdam is (415) 221-0665.
- Does Jennifer Van Warmerdam accept Medicare?
- Jennifer Van Warmerdam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Van Warmerdam's NPI active?
- Yes — Jennifer Van Warmerdam's NPI (1922232404) is active in the NPPES registry as of the last update on 2023-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.