NPI registry status
Active
2026 NPPES data Allergy & Immunology (Internal Medicine) Physician NPI 1184069692 M.D.
Verify on CMS → Tyler Basen, M.D.
Allergy & Immunology (Internal Medicine) Physician in Mission Viejo, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 520 in Allergy & Immunology (Internal Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
628
Medicare Part D claims · 146 beneficiaries · Allergy & Immunology (Internal Medicine) Physician avg: 798
Generic prescribing
63%
generic claims · 37% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$37.4K
105 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Tyler Basen, M.D. filed 628 Medicare Part D claims in 2023 as a Allergy & Immunology (Internal Medicine) Physician in Mission Viejo, California, prescribing 63% generic.
- 628
- Part D claims, 2023
- 63%
- generic prescribing
- $37.4K
- industry payments (Sunshine Act)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Tyler Basen, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
628 Top 31% higher than 69% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Tyler Basen, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Tyler Basen, M.D.?
Quality data not reportedPrimary specialty
Allergy & Immunology (Internal Medicine) Physician
Medicare Part D claims
628 21% vs specialty avg
Specialty distribution in California
How Allergy & Immunology (Internal Medicine) Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Allergy & Immunology (Internal Medicine) Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Tyler Basen, M.D. appears in the CMS NPPES registry as a Allergy & Immunology (Internal Medicine) Physician provider holding M.D. credentials at 26691 PLAZA STE 170, Mission Viejo, CA, 92691, with a listed phone of (949) 755-6414. NPI 1184069692 was issued on 05/10/2013.
Medicare Part D records for calendar year 2023 show 628 prescription claims written by this provider, covering 146 Medicare beneficiaries and totaling roughly $253K in drug spend, split 37% brand-name and 63% generic by claim count.
Allergy & Immunology (Internal Medicine) Physician is a narrow specialty nationwide, with 520 enrolled providers across 48 states and an average of 798 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1184069692 |
|---|---|
| Specialty | Allergy & Immunology (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/10/2013 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Tyler Basen, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$37.4K
Largest payer
GlaxoSmithKline, LLC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Tyler Basen, M.D.. To verify Tyler Basen, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Tyler Basen, M.D. - brand share 37.0%
Allergy & Immunology (Internal Medicine) Physician average
37% brand-name claims vs 63% generic, on 628 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
628
Total Claims
$253K
Total Drug Cost
146
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 799
- Total Day Supply
- 22,842
- Brand vs Generic
- 37% brand / 63% generic
- Brand Drug Cost
- $241K
- Generic Drug Cost
- $12K
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 1.12
- Gender Split
- 66% female / 34% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Tyler Basen, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
153 claims
- Ipratropium Bromide
Ipratropium Bromide
80 claims
- Trelegy Ellipta
Trelegy Ellipta
75 claims
- Azelastine Hcl 49
Azelastine Hcl
49 claims
- Breo Ellipta 27
Breo Ellipta
27 claims
- Epinephrine 25
Epinephrine
25 claims
- Advair Diskus 19
Advair Diskus
19 claims
- Albuterol Sulfate … 19
Albuterol Sulfate Hfa
19 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 153 |
| Ipratropium Bromide | 80 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 75 |
| Azelastine Hcl | 49 |
| Breo Ellipta Fluticasone/Vilanterol | 27 |
| Epinephrine | 25 |
| Advair Diskus Fluticasone Propion/Salmeterol | 19 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 19 |
| Prednisone | 18 |
| Gammagard Liquid Immun Glob G(Igg)/Gly/Iga Ov50 | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Allergy & Immunology (Internal Medicine) Physician in CA →
All providers in California →
Compare specialties →
Allergy & Immunology (Internal Medicine) Physician Overview
How Tyler Basen, M.D. fits within the Allergy & Immunology (Internal Medicine) Physician landscape nationally.
520
Allergy & Immunology (Internal Medicine) Physician Providers in US
48
States with Allergy & Immunology (Internal Medicine) Physician
798
Avg Claims per Provider
Tyler Basen, M.D.'s 628 claims are below the specialty average of 798.
Nearby Allergy & Immunology (Internal Medicine) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Basen.
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy & Immunology (Internal Medicine) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Tyler Basen, M.D.'s specialty? ▼
Tyler Basen, M.D. specializes in Allergy & Immunology (Internal Medicine) Physician and practices in Mission Viejo, California. Credentials: M.D..
How much does Tyler Basen, M.D. prescribe under Medicare Part D? ▼
In 2023, Tyler Basen, M.D. wrote 628 Medicare Part D claims totaling $253K in drug costs for 146 beneficiaries.
Where is Tyler Basen, M.D. located? ▼
Tyler Basen, M.D. is located at 26691 PLAZA STE 170, Mission Viejo, CA, 92691. Phone: (949) 755-6414.
What is Tyler Basen, M.D.'s NPI number? ▼
Tyler Basen, M.D.'s National Provider Identifier (NPI) is 1184069692, issued on 05/10/2013.
Does Tyler Basen, M.D. prescribe more brand-name or generic drugs? ▼
Tyler Basen, M.D.'s prescribing is 37% brand-name and 63% generic drugs by claim count, with $241K in brand drug costs.
How many Allergy & Immunology (Internal Medicine) Physician providers are there in the US? ▼
There are 520 Allergy & Immunology (Internal Medicine) Physician providers across 48 states in the US. The average Allergy & Immunology (Internal Medicine) Physician provider writes 798 Medicare Part D claims per year.
What drugs does Tyler Basen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Tyler Basen, M.D.'s most frequently prescribed drugs include Montelukast Sodium, Ipratropium Bromide, Trelegy Ellipta. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tyler Basen, M.D. accept Medicare? ▼
Tyler Basen, M.D. appears in CMS Medicare data with 628 Part D claims and 146 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tyler Basen, M.D.'s credentials? ▼
Tyler Basen, M.D.'s NPI is 1184069692 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.