Dr. Terrie Susie Ahn, MD

  • Los Angeles, CA
  • Allergist and immunologist
NPI1093166795PAC ID1759760457
Medicare services, 2024
1,004
Medicare patients, 2024
125
Part D claims, 2024
425
Publications
1
MIPS score, 2024
88
Practice address
5767 W Century Blvd, Los Angeles, CA 90045
Practice phone
Call (310) 794-1276
Professional email
Get professional email
Personal email
Get personal email
Mobile number
Get mobile number
Social profiles

Primary practice

UCLA Medical Plaza

Los Angeles, California

See all 5 affiliations

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Dr. Terrie Susie Ahn is an allergist and immunologist in Los Angeles, California

Dr. Ahn practices at UCLA Medical Plaza in Los Angeles, California.

Dr. Ahn's NPI, 1093166795, was assigned on June 24, 2016. Dr. Ahn graduated from Wayne State University School Of Medicine in 2016. Dr. Ahn holds California license A162214.

NPI and contact details
Medicare PAC ID
1759760457
NPI enumeration date
June 24, 2016
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(310) 794-1276
Professional email
Get email
Personal email
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Mobile number
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Sex
Female
Estimated age
36
Medical school graduation
2016

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Terrie Susie Ahn practices at UCLA Medical Plaza in Los Angeles, California

Dr. Ahn's primary practice is UCLA Medical Plaza, at 5767 W Century Blvd, Los Angeles, CA 90045 in Los Angeles County. The practice phone is (310) 794-1276.

  • UCLA Medical Plaza
    5767 W Century Blvd, Los Angeles, CA 90045 · Los Angeles CountyPhone(310) 794-1276

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Terrie Susie Ahn is affiliated with 4 sites of care and 1 medical group

Dr. Ahn's primary practice is UCLA Medical Plaza in Los Angeles, California. Dr. Ahn is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is UCLA Medical Group. Dmand AI also links Dr. Ahn to 1 more hospital and 1 group practice or clinic, each named with a free account.

See all 5 affiliations for Dr. Ahn

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Terrie Susie Ahn's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ahn practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
UCLA Medical PlazaAvailable with a free account
+3 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Terrie Susie Ahn is one of 386 allergists and immunologists in California

Allergy and immunology is Dr. Ahn's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Ahn is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dmand AI has Dr. Ahn's licenses on file in 2 states: California and Michigan.

Specialties and state licenses

  • Allergy and immunology, CaliforniaPrimaryLicense A162214 · 2019 to 2027 · taxonomy 207K00000X
  • Michigan license2016 to 2019

Clinical focus

Dmand AI lists asthma, chronic nasal allergies, hives and immune deficiency disease among the conditions Dr. Ahn treats.

Allergists and immunologists near Dr. Ahn

Counts of allergists and immunologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Terrie Susie Ahn billed Medicare for 1,004 services in 2024

CMS data shows 1,004 Medicare services from Dr. Ahn across 10 procedure codes in 2024, for 125 Medicare patients. Medicare paid $24,054 for them. Every service was in an office.

Medicare services, 20241,004
Medicare patients125
Paid by Medicare$24,054
Procedure codes10

Dr. Ahn's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Tests and treatments
2023: 7422024: 7927%
Office and hospital visits
2023: 1662024: 1787%
Other services
2023: 02024: 34

Dr. Ahn compared with the California median for allergists and immunologists, 2024

  • Dr. Ahn
  • California median
Medicare services
1,004vs 1,84045% below
Medicare patients
125vs 14514% below
Part D claims
285vs 25910% above

Medians across 368 allergists and immunologists in California with Dmand AI profiles that report each measure.

Dr. Ahn's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Ahn

Need commercial claims for Dr. Ahn?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ahn and other allergists and immunologists in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Terrie Susie Ahn treated 125 Medicare patients in 2024, average age 69

CMS counts 125 Medicare patients who saw Dr. Ahn in 2024. The largest group is 65 to 74, with 55 patients. 75% of them have high cholesterol, and 64% have arthritis. 26% are also on Medicaid. Their average risk score is 1.77, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Ahn's median patient age at 40, with 63% women.

Medicare patients, 2024125
Average age69
Average risk score1.77
Also on Medicaid26%

Dr. Ahn's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Ahn's Medicare patients by sex, 2024

  • Women8064%
  • Men4536%

Chronic conditions among Dr. Ahn's Medicare patients, 2024

  1. High cholesterol75%
  2. Arthritis64%
  3. High blood pressure64%
  4. Mood disorders37%
  5. Asthma36%
  6. Anxiety34%
  7. Depression34%
  8. Ischemic heart disease32%

Share of Medicare patients with each condition. A patient can have several.

Dr. Ahn's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 40

Patient panel by sex, all payers

  • Women63%
  • Men35%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Terrie Susie Ahn wrote 425 Medicare Part D claims in 2024

In 2024, Dr. Ahn wrote 425 Medicare Part D claims for 112 patients. 60% of them were for generic drugs. CMS names the drug for 285 of them, across 11 drugs with 11 or more claims each, at $343,579 in total drug cost. In 2023, CMS named 258 claims across 12 drugs.

Part D claims, 2024425
Drugs named by CMS11
Total drug cost$343,579
Part D patients112

Dr. Ahn's Part D claims by kind of drug, 2024

  • Generic257 claims60%
  • Brand-name168 claims40%

Dr. Ahn's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Ahn's Part D claims, 2024

  • Antibiotics3%12 of 425 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 2582024: 28510%

Drugs named by CMS: 11 in 2024, 12 in 2023.

See all prescribing by Dr. Ahn

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Terrie Susie Ahn scored 88 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Ahn for performance year 2024, reported as part of a group. Dr. Ahn accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ahn as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Ahn's MIPS scores, performance year 2024

  • 88of 100Final score
  • 79.4of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 74of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Terrie Susie Ahn has 1 publication on record

Dmand AI links 1 paper to Dr. Ahn. Dr. Ahn's most frequent co-authors are Begum Akay, MD and Ali Kemal Ozcan, MD.

Papers1

Dr. Ahn's most frequent co-authors

Recent publications by Dr. Ahn

See all 1 publications and co-authors

See who Dr. Ahn researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ahn works with, so you can find a warm path to the right allergists and immunologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Terrie Susie Ahn received $2,678 in industry payments from 2019 to 2025

CMS Open Payments shows 43 general payments to Dr. Ahn from 16 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $633.

General payments to Dr. Ahn by program year, 2019 to 2025

Companies that paid Dr. Ahn the most, 2019 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Ahn

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Terrie Susie Ahn graduated from Wayne State University School Of Medicine

Dr. Ahn graduated from Wayne State University School Of Medicine in 2016.

  1. Medical schoolWayne State University School Of Medicine
  2. Board certified in allergy & immunologyAmerican Board of Allergy and Immunology
  3. Board certified in pediatricsAmerican Board of Pediatrics

Source: Dmand AI Professional Profile Data

Dr. Terrie Susie Ahn accepts plans from 13 insurance carriers

Dr. Ahn is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • Alliant Health Plans
  • +5 more carriersWith a free account

Plan types Dr. Ahn accepts, by number of carriers

  1. PPO9
  2. Medicare8
  3. HMO6
  4. EPO4
  5. POS4

Source: Dmand AI Insurance Network Data

Sources for Dr. Terrie Susie Ahn's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Terrie Susie Ahn

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Terrie Susie Ahn's NPI number?

Dr. Terrie Susie Ahn's NPI number is 1093166795. It was assigned on June 24, 2016, and it is active in the NPI Registry.

What kind of doctor is Dr. Terrie Susie Ahn?

Dr. Terrie Susie Ahn is an allergist and immunologist in Los Angeles, California. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).

Where does Dr. Terrie Susie Ahn practice?

Dr. Ahn practices at 5767 W Century Blvd, Los Angeles, CA 90045. Dr. Ahn's primary practice is UCLA Medical Plaza in Los Angeles, California. Dmand AI also links Dr. Ahn to 1 hospital and 1 group practice or clinic.

What is Dr. Terrie Susie Ahn's office phone number?

The practice phone on file for Dr. Ahn is (310) 794-1276.

What is Dr. Terrie Susie Ahn's medical license number?

Dr. Ahn holds California license A162214, one of the licenses on file in 2 states.

Which states has Dr. Terrie Susie Ahn been licensed in?

Dmand AI has state licenses on file for Dr. Ahn in California (2019 to 2027) and Michigan (2016 to 2019).

Which hospitals is Dr. Terrie Susie Ahn affiliated with?

Dr. Ahn is affiliated with Ronald Reagan UCLA Medical Center. Dmand AI links Dr. Ahn to 1 more hospital.

What medical group is Dr. Terrie Susie Ahn part of?

Dr. Ahn is linked to UCLA Medical Group.

Does Dr. Terrie Susie Ahn accept Medicare?

Yes. CMS data shows Dr. Ahn billed Medicare for 1,004 services in 2024, and Dr. Ahn accepts Medicare assignment.

Does Dr. Terrie Susie Ahn offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Ahn as offering telehealth services.

Show 11 more questionsShow fewer questions

What is Dr. Terrie Susie Ahn's MIPS score?

Dr. Ahn's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.

How many Medicare patients does Dr. Terrie Susie Ahn see?

CMS counts 125 Medicare patients who saw Dr. Ahn in 2024, with an average age of 69.

Is Dr. Terrie Susie Ahn board certified?

Yes. Dr. Ahn is board certified in allergy & immunology by the American Board of Allergy and Immunology.

What services does Dr. Terrie Susie Ahn bill to Medicare?

In 2024, Dr. Ahn's most billed Medicare services were allergy test or treatment (95004), infusion or chemotherapy administration (96372) and office visit, established patient (99214).

Where did Dr. Terrie Susie Ahn go to medical school?

Dr. Ahn graduated from Wayne State University School Of Medicine in 2016.

What drugs does Dr. Terrie Susie Ahn prescribe most?

In 2024 Medicare Part D data, Dr. Ahn's most prescribed drugs by claims were Azelastine HCl, Montelukast Sodium and Dupixent Pen.

Has Dr. Terrie Susie Ahn received payments from drug or device companies?

CMS Open Payments shows $2,678 in general payments to Dr. Ahn from 16 companies from 2019 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.

How long has Dr. Terrie Susie Ahn been practicing?

Dr. Ahn graduated from medical school in 2016, 10 years ago.

Does Dr. Terrie Susie Ahn do research?

Dmand AI links 1 publication to Dr. Ahn.

Who does Dr. Terrie Susie Ahn publish with?

Dr. Ahn's most frequent co-authors are Begum Akay, MD (1 shared paper) and Ali Kemal Ozcan, MD (1 shared paper).

What insurance does Dr. Terrie Susie Ahn accept?

Dr. Ahn is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.

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