Thomas Joseph Diamant, MD
Pulmonary Disease Physician · Costa Mesa, CA
Thomas Joseph Diamant, MD is a pulmonary disease physician with a practice address in Costa Mesa, California, and NPI 1952310872, issued on Aug 7, 2006. Check the license (California G43620, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Joseph Diamant
- Credential
- MD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- G43620 CA
Self-reported in NPPES; status is on the state search - Practice location
- 136 Broadway, Costa Mesa, CA 92627
- Phone
- (949) 873-5537
- Enumerated
- Aug 7, 2006
- Record last updated
- Aug 6, 2024
- Medicare enrollment
- Enrolled (PECOS I20120410000195); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 136 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lakshay Jain, MDPulmonary Disease Physician1831756444
- Lakshmi Shukla, MDPulmonary Disease Physician1407043243
- Alexander Sweidan, MDPulmonary Disease Physician1689070161
Verify Thomas Joseph Diamant in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G43620Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% more Medicare Part D claims than the average pulmonary disease physician in 2024
2,211 Medicare Part D claims for 399 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Albuterol Sulfate Hfa379 claims
- Breo Ellipta233 claims
- Prednisone204 claims
- Methylprednisolone169 claims
- Ipratropium Bromide124 claims
- Azithromycin122 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,011.94
120 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mesa Pulmonary Group IncCosta Mesa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pulmonary Disease Physician providers in California
There are 1,443 pulmonary disease physician records in California.
Other pulmonary disease physician records in California
- Manoochehr Abadian Sharifabad, M.D.Fountain Valley, CA1164655817
- Mahmoud Abdallah, DOGarden Grove, CA1871014027
- Mohamad Abdelfattah, MDFullerton, CA1134539711
- Loui Abdelghani, M.DStockton, CA1912161787
- Zainab Abdulsada, MBCHBSacramento, CA1144858333
- John Abe, MDTorrance, CA1578542569
- Moustapha Abidali, DOGlendora, CA1669810123
- Mohammed Abo Khamis, M.D.Modesto, CA1508098419
- Arin Aboulian, MDGlendale, CA1104038256
- Khader Abounasr, MDRancho Cucamonga, CA1780884015
Common questions
What is Thomas Joseph Diamant, MD's NPI number?
Thomas Joseph Diamant, MD's National Provider Identifier (NPI) is 1952310872, issued on Aug 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Joseph Diamant, MD located?
The NPPES record lists a practice address at 136 Broadway, Costa Mesa, CA, 92627. Phone: (949) 873-5537. Providers update this record themselves, so call before visiting.
How can I verify Thomas Joseph Diamant, MD's license?
NPPES lists California license number G43620, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Joseph Diamant, MD prescribe under Medicare Part D?
In 2024, Thomas Joseph Diamant, MD had 2,211 Medicare Part D claims for 399 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Thomas Joseph Diamant, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.