Thomas Diamant, MD
NPI 1952310872 · Pulmonary Disease Physician · Costa Mesa, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Diamant, MD is a Pulmonary Disease Physician provider in Costa Mesa, CA (NPI 1952310872).
Provider details
- NPI number
- 1952310872
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G43620 (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
19 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
3,520 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 1,115 | $194 |
| Test to Measure Rate of Airflow94375 | 1,029 | $44 |
| Test to Determine Lung Volumes Using Sensors94726 | 232 | $64 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 232 | $65 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 164 | $236 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 147 | $138 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 379 | 168 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 233 | 56 |
| Prednisone | 204 | 75 |
| Methylprednisolone | 169 | 93 |
| Ipratropium Bromide | 124 | 74 |
| Azithromycin | 122 | 81 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 104 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,012 across 120 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
- 2006-08-07
- Last updated
- 2024-08-06
- Certified
- 2024-08-06
Frequently asked questions
- What is Thomas Diamant's NPI number?
- Thomas Diamant's National Provider Identifier (NPI) is 1952310872, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Diamant's specialty?
- Thomas Diamant is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Diamant located?
- Thomas Diamant's practice location on file with NPPES is 136 Broadway, Costa Mesa, CA 92627-2818.
- What is Thomas Diamant's phone number?
- The practice phone number listed in the NPPES registry for Thomas Diamant is (949) 873-5537.
- Does Thomas Diamant accept Medicare?
- Thomas Diamant is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Diamant's NPI active?
- Yes — Thomas Diamant's NPI (1952310872) is active in the NPPES registry as of the last update on 2024-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.