Tyler Basen, M.D.
Allergy & Immunology (Internal Medicine) Physician · Mission Viejo, CA
Tyler Basen, M.D. is an allergy & immunology (internal medicine) physician with a practice address in Mission Viejo, California, and NPI 1184069692, issued on May 10, 2013. Check the license (California A141359, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tyler Basen
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology (Internal Medicine) Physician 207RA0201X
- License number
- A141359 CA
Self-reported in NPPES; status is on the state search - Practice location
- 26691 Plaza Ste 170, Mission Viejo, CA 92691
- Phone
- (949) 755-6414
- Enumerated
- May 10, 2013
- Record last updated
- Oct 29, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (339) 207-0457
- Medicaid ID
- CB299568 CA
- Medicare enrollment
- Enrolled (PECOS I20180702002813); accepts Medicare assignment
- Medical or professional school
- Drexel University College Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology (internal medicine) physician records → All 81 in California → Look up another NPI →
Also registered at 26691 Plaza Ste 170
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cheryl OneilOther Technician1619419173
Verify Tyler Basen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A141359Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average allergy & immunology (internal medicine) physician in 2024
811 Medicare Part D claims for 183 beneficiaries, against an average of 789 among the 429 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Montelukast Sodium98 claims
- Ipratropium Bromide87 claims
- Azelastine Hcl73 claims
- Trelegy Ellipta65 claims
- Albuterol Sulfate Hfa59 claims
- Breo Ellipta58 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: $37,360.25
105 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 321 providers of this specialty with any payment received $7,456.30 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.
Tyler Basen among 81 allergy & immunology (internal medicine) physician records in California
Tyler Basen, M.D. is one of 81 allergy & immunology (internal medicine) physician records with a practice address in California. 67% 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 62% of them.
- NPI issued2013 · 62% of these records are older, 31% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2013 · median 2010 among the 46 with a school on file
- Record last updated2020 · 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 207RA0201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology (Internal Medicine) Physician providers in California
There are 81 allergy & immunology (internal medicine) physician records in California.
All 81 in California → Every provider in Mission Viejo → Allergy & Immunology (Internal Medicine) Physician nationwide →
The 8 allergy & immunology (internal medicine) physician records with the nearest ZIP codes
- Bruce Nelson, M.D.Mission Viejo, CA 926911649269614
- Jeremy Kaslow, M.D.Santa Ana, CA 927051144305574
- Trisha Sharma, M.D.Irvine, CA 926041811315781
- Joseph Nguyen, MDOrange, CA 928681225217425
- Monica TsaiOrange, CA 928681598176497
- Christelle Miot, MDLoma Linda, CA 923541487150736
- Liza Presser Belkin, M.D.Santa Barbara, CA 931111982709036
- Christopher Foster, MDSan Diego, CA 921061588710644
Common questions
What is Tyler Basen, M.D.'s NPI number?
Tyler Basen, M.D.'s National Provider Identifier (NPI) is 1184069692, issued on May 10, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Tyler Basen, M.D. located?
The NPPES record lists a practice address at 26691 Plaza Ste 170, Mission Viejo, CA, 92691. Phone: (949) 755-6414. Providers update this record themselves, so call before visiting.
How can I verify Tyler Basen, M.D.'s license?
NPPES lists California license number A141359, 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 Tyler Basen, M.D. prescribe under Medicare Part D?
In 2024, Tyler Basen, M.D. had 811 Medicare Part D claims for 183 beneficiaries; the average among allergy & immunology (internal medicine) physician prescribers was 789. 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.