Siamak N. Nabili, M.D.
Hospitalist Physician · Irvine, CA
Siamak N. Nabili, M.D. is a hospitalist physician with a practice address in Irvine, California, and NPI 1407892490, issued on Jun 20, 2006. Check the license (California A83984, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Siamak N. Nabili
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A83984 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11 Technology Dr, Irvine, CA 92618
- Phone
- (855) 206-6764
- Enumerated
- Jun 20, 2006
- Record last updated
- Aug 5, 2025
- Fax
- (949) 923-3575
- Medicare enrollment
- Enrolled (PECOS I20040909000521); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 11 Technology Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ali Ahoui, MDHospitalist Physician1093964769
- Nidal Al Hannat, M.D.Internal Medicine Physician1235335563
- Richard AppelInternal Medicine Physician1336225044
- Juan Cabrera, M.D.Internal Medicine Physician1447254792
- Houman Danesh, M.D.Internal Medicine Physician1205027802
Verify Siamak N. Nabili in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A83984Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average hospitalist physician in 2024
275 Medicare Part D claims for 120 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Amlodipine Besylate22 claims
- Pantoprazole Sodium16 claims
- Prednisone13 claims
- Atorvastatin Calcium11 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.
Industry payments in 2024: $19.83
1 payment: food and beverage; the largest payer was Amgen Inc. The 7,324 providers of this specialty with any payment received $494.84 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
- Nili N. Alai, MD, Inc.Laguna Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Siamak N. Nabili among 3,099 hospitalist physician records in California
Siamak N. Nabili, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2001 · median 2010 among the 2,505 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Irvine → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Ali Ahoui, MDIrvine, CA 926181093964769
- Robert Cho, M.D.Irvine, CA 926181760578512
- Scott Derkum, MDIrvine, CA 926181588660849
- John Dieckhoff, M.D.Irvine, CA 926181700068152
- Veejay Geria, M.D.Irvine, CA 926181821193467
- Derrick Hong, M.DIrvine, CA 926181124040696
- Nam Kim, MDIrvine, CA 926181861572513
- Ewa Kontny, M.D.Irvine, CA 926181598916587
Common questions
What is Siamak N. Nabili, M.D.'s NPI number?
Siamak N. Nabili, M.D.'s National Provider Identifier (NPI) is 1407892490, issued on Jun 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Siamak N. Nabili, M.D. located?
The NPPES record lists a practice address at 11 Technology Dr, Irvine, CA, 92618. Phone: (855) 206-6764. Providers update this record themselves, so call before visiting.
How can I verify Siamak N. Nabili, M.D.'s license?
NPPES lists California license number A83984, 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 Siamak N. Nabili, M.D. prescribe under Medicare Part D?
In 2024, Siamak N. Nabili, M.D. had 275 Medicare Part D claims for 120 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
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.