Gregory Warner, M.D.
NPI 1699810689 · Critical Care Medicine (Internal Medicine) Physician · Visalia, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Warner, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Visalia, CA (NPI 1699810689).
Provider details
- NPI number
- 1699810689
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G55305 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,154 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 448 | $206 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 164 | $93 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 130 | $130 |
| Test to Determine Lung Volumes Using Sensors94726 | 81 | $12 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 77 | $116 |
| Sleep Study in Sleep Lab With Continuous Airway Pressure (6 Years Or Older)95811 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 292 | 77 |
| Montelukast Sodium | 98 | 35 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 97 | 44 |
| Azithromycin | 55 | 12 |
| Nintedanib Esylatebrand: Ofev | 54 | — |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 45 | 13 |
| Prednisone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,034 across 33 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
Additional practice locations (1)
- 1303 E Herndon AveFresno, CA 93720-3309Phone: (559) 450-5672
Registry dates
- Enumerated
- 2007-02-20
- Last updated
- 2024-10-23
- Certified
- 2024-10-23
Frequently asked questions
- What is Gregory Warner's NPI number?
- Gregory Warner's National Provider Identifier (NPI) is 1699810689, 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 Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Warner located?
- Gregory Warner's practice location on file with NPPES is 5400 W Hillsdale Ave, Visalia, CA 93291-8222.
- What is Gregory Warner's phone number?
- The practice phone number listed in the NPPES registry for Gregory Warner is (559) 738-7511.
- 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 (1699810689) is active in the NPPES registry as of the last update on 2024-10-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.