Gregory Warner, D.O.
NPI 1073704326 · Infectious Disease Physician · Vacaville, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Warner, D.O. is a Infectious Disease Physician provider in Vacaville, CA (NPI 1073704326).
Provider details
- NPI number
- 1073704326
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A9902 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
965 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 510 | $84 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 249 | $184 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 182 | $202 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 24 | $246 |
Typical Medicare-allowed amounts for these services range $84–$246 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 82 | — |
| Cephalexin | 48 | 13 |
| Daptomycin | 45 | 11 |
| Fosfomycin Tromethamine | 41 | — |
| Doxycycline Hyclate | 35 | 13 |
| Dolutegravir Sodiumbrand: Tivicay | 33 | — |
| Cefpodoxime Proxetil | 33 | — |
| Ertapenem Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$181 across 8 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
- 2007-08-01
- Last updated
- 2013-09-17
Frequently asked questions
- What is Gregory Warner's NPI number?
- Gregory Warner's National Provider Identifier (NPI) is 1073704326, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Warner's specialty?
- Gregory Warner is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Warner located?
- Gregory Warner's practice location on file with NPPES is 1010 Nut Tree Rd, Vacaville, CA 95687-4172.
- What is Gregory Warner's phone number?
- The practice phone number listed in the NPPES registry for Gregory Warner is (707) 624-7999.
- Does Gregory Warner accept Medicare?
- Gregory Warner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Warner's NPI active?
- Yes — Gregory Warner's NPI (1073704326) is active in the NPPES registry as of the last update on 2013-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.