David Sommerhalder
NPI 1821417270 · Hematology & Oncology Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Sommerhalder is a Hematology & Oncology Physician provider in San Antonio, TX (NPI 1821417270).
Provider details
- NPI number
- 1821417270
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,038 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 269 | $86 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 208 | $120 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 128 | $120 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 118 | $14 |
| Infusion Into a Vein for Hydration, Each Additional Hour96361 | 109 | $11 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 61 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 44 | 17 |
| Prednisone | 41 | 13 |
| Gabapentin | 31 | — |
| Doxycycline Monohydrate | 24 | — |
| Granisetron Hcl | 24 | — |
| Apixabanbrand: Eliquis | 22 | — |
| Enzalutamidebrand: Xtandi | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,927 across 89 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
- 2014-04-14
- Last updated
- 2021-12-13
- Certified
- 2021-12-13
Frequently asked questions
- What is David Sommerhalder's NPI number?
- David Sommerhalder's National Provider Identifier (NPI) is 1821417270, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Sommerhalder's specialty?
- David Sommerhalder is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is David Sommerhalder located?
- David Sommerhalder's practice location on file with NPPES is 2829 Babcock Rd Ste 300, San Antonio, TX 78229-6011.
- What is David Sommerhalder's phone number?
- The practice phone number listed in the NPPES registry for David Sommerhalder is (210) 580-9500.
- Does David Sommerhalder accept Medicare?
- David Sommerhalder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Sommerhalder's NPI active?
- Yes — David Sommerhalder's NPI (1821417270) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.