Siena Elisa Nadal Ona, M.D.
Spinal Cord Injury Medicine Physician · Long Beach, CA
Siena Elisa Nadal Ona, M.D. is a spinal cord injury medicine physician with a practice address in Long Beach, California, and NPI 1174963458, issued on Jul 1, 2013. Check the license (California A172213, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Siena Elisa Nadal Ona
- Credential
- M.D.
- Primary taxonomy
- Spinal Cord Injury Medicine Physician 2081P0004X
- License numbers
- A172213 CA
036-145373 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2801 Atlantic Ave, Long Beach, CA 90806
- Phone
- (562) 933-2000
- Enumerated
- Jul 1, 2013
- Record last updated
- May 21, 2026
- Medicare enrollment
- Enrolled (PECOS I20210928003199); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest spinal cord injury medicine physician records → All 30 in California → Look up another NPI →
Also registered at 2801 Atlantic Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Naima Abdirahman, NPAcute Care Nurse Practitioner1215640560
- William AbeClinical Social Worker1316550148
- Holly Adams, MSW, LCSW, OSW-CClinical Social Worker1639591134
- Jennifer Agnew, PHARM. DPharmacist1285435685
- Mannat Agnish, MD, MPHStudent in an Organized Health Care Education/Training Program1881321883
- Mary Elaine Aguilar-Choomngern, NPMedical-Surgical Registered Nurse1033765474
Verify Siena Elisa Nadal Ona in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A172213Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average spinal cord injury medicine physician in 2024
11 Medicare Part D claims, against an average of 487 among the 99 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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: $146.24
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 56 providers of this specialty with any payment received $1,104.01 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 2 group practices
- Dieumy Michelle Thai M D IncFullerton, CA
- Scientia Caritas MedicineFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Siena Elisa Nadal Ona among 30 spinal cord injury medicine physician records in California
Siena Elisa Nadal Ona, M.D. is one of 30 spinal cord injury medicine physician records with a practice address in California. 40% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 73% of them.
- NPI issued2013 · 73% of these records are older, 23% newer
- In a Medicare fileYes · 40% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2010 · median 2001 among the 12 with a school on file
- Record last updated2026 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2081P0004X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Spinal Cord Injury Medicine Physician providers in California
There are 30 spinal cord injury medicine physician records in California.
All 30 in California → Every provider in Long Beach → Spinal Cord Injury Medicine Physician nationwide →
The 8 spinal cord injury medicine physician records with the nearest ZIP codes
- Alice Hon, MDLong Beach, CA 908221548586639
- Vernon Lin, MD, PHDLong Beach, CA 908221740385889
- Patricia Nance, M.D.Long Beach, CA 908221700830312
- Sandhi Wynn, NPLong Beach, CA 908221508372772
- Jeremy LouParamount, CA 907231811344229
- Ramin Hazany, M.D.Inglewood, CA 903011225043185
- Thomas Hedge, M.D.Northridge, CA 913251316901861
- Anne Nastasi, M.D.North Hills, CA 913431801837893
Common questions
What is Siena Elisa Nadal Ona, M.D.'s NPI number?
Siena Elisa Nadal Ona, M.D.'s National Provider Identifier (NPI) is 1174963458, issued on Jul 1, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Siena Elisa Nadal Ona, M.D. located?
The NPPES record lists a practice address at 2801 Atlantic Ave, Long Beach, CA, 90806. Phone: (562) 933-2000. Providers update this record themselves, so call before visiting.
How can I verify Siena Elisa Nadal Ona, M.D.'s license?
NPPES lists California license number A172213, 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 Siena Elisa Nadal Ona, M.D. prescribe under Medicare Part D?
In 2024, Siena Elisa Nadal Ona, M.D. had 11 Medicare Part D claims; the average among spinal cord injury medicine physician prescribers was 487. 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.