Gregory Tirdel, MD
NPI 1821080144 · Internal Medicine Physician · Truckee, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Tirdel, MD is a Internal Medicine Physician provider in Truckee, CA (NPI 1821080144).
Provider details
- NPI number
- 1821080144
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G69661 (CA)
Specialties & taxonomies
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
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
168 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) |
|---|---|---|
| Sleep Study in Sleep Lab With Continuous Airway Pressure (6 Years Or Older)95811 | 79 | $129 |
| Home Sleep Test (hst) With Type III Portable Monitor, Unattended; Minimum of 4 Channels: 2 Respiratory Movement/Airflow, 1 Ecg/Heart Rate and 1 Oxygen SaturationG0399 | 46 | $47 |
| Sleep Study in Sleep Lab (6 Years Or Older)95810 | 43 | $123 |
Typical Medicare-allowed amounts for these services range $47–$129 (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 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Umeclidinium Brm/Vilanterol Trbrand: Anoro Ellipta | 240 | 46 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 168 | 60 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 150 | 34 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 78 | 15 |
| Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol | 78 | 23 |
| Montelukast Sodium | 76 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$217 across 2 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
- 2005-08-22
- Last updated
- 2012-02-17
Frequently asked questions
- What is Gregory Tirdel's NPI number?
- Gregory Tirdel's National Provider Identifier (NPI) is 1821080144, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Tirdel's specialty?
- Gregory Tirdel is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Tirdel located?
- Gregory Tirdel's practice location on file with NPPES is 10956 Donner Pass Rd, Truckee, CA 96161-4861.
- What is Gregory Tirdel's phone number?
- The practice phone number listed in the NPPES registry for Gregory Tirdel is (530) 582-6400.
- Does Gregory Tirdel accept Medicare?
- Gregory Tirdel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Tirdel's NPI active?
- Yes — Gregory Tirdel's NPI (1821080144) is active in the NPPES registry as of the last update on 2012-02-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.