Alyssa Pyun

  • Los Angeles, CA
  • Vascular surgeon
NPI1215469945PAC ID4284961772
Medicare services, 2024
123
Medicare patients, 2024
124
Publications
1
Hospital affiliations
2
Industry payments
$14,466
Practice address
1500 San Pablo Street, Los Angeles, CA 90033
Practice phone
Call (323) 442-8656
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Keck Hospital of USC

Hospital · Los Angeles, California

See all 6 affiliations

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Alyssa Pyun is a vascular surgeon in Los Angeles, California

Alyssa Pyun practices at Keck Hospital of USC in Los Angeles, California, part of University of Southern California.

Alyssa Pyun's NPI, 1215469945, was assigned on March 31, 2017. Alyssa Pyun graduated from University Of Cincinnati College Of Medicine in 2017. Alyssa Pyun holds California license A162887.

NPI and contact details
Medicare PAC ID
4284961772
NPI enumeration date
March 31, 2017
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(323) 442-8656
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Female
Estimated age
35
Medical school graduation
2017

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

Alyssa Pyun practices at Keck Hospital of USC in Los Angeles, California

Alyssa Pyun's primary practice is Keck Hospital of USC, at 1500 San Pablo Street, Los Angeles, CA 90033 in Los Angeles County. The practice phone is (323) 442-8656.

  • Keck Hospital of USC
    1500 San Pablo Street, Los Angeles, CA 90033 · Los Angeles CountyPhone(323) 442-8656

Source: Dmand AI Affiliation Data

Alyssa Pyun is affiliated with 5 sites of care and 1 medical group

Alyssa Pyun's primary practice is Keck Hospital of USC in Los Angeles, California, part of University of Southern California. Alyssa Pyun is also affiliated with Los Angeles General Medical Center. The medical group on file is USC Care Medical Group. Dmand AI also links Alyssa Pyun to 1 more group practice or clinic, 1 other site and 1 urgent care center, each named with a free account.

See all 6 affiliations for Alyssa Pyun

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Alyssa Pyun's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Alyssa Pyun practices, 5 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Keck Hospital of USCAvailable with a free account
+4 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Alyssa Pyun is one of 532 vascular surgeons in California

Vascular surgery is Alyssa Pyun's primary specialty in the NPI Registry, under taxonomy code 2086S0129X. Alyssa Pyun is board certified in vascular surgery by the American Board of Surgery. Alyssa Pyun is licensed in California.

Specialties and state licenses

  • Vascular surgery, CaliforniaPrimaryLicense A162887 · 2019 to 2027 · taxonomy 2086S0129X

Vascular surgeons near Alyssa Pyun

Counts of vascular surgeons 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

Alyssa Pyun billed Medicare for 123 services in 2024

CMS data shows 123 Medicare services from Alyssa Pyun across 6 procedure codes in 2024, for 124 Medicare patients. Medicare paid $10,529 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024123
Medicare patients124
Paid by Medicare$10,529
Procedure codes6

Alyssa Pyun's Medicare services by type, 2024

  1. Office and hospital visits88
  2. Surgery35

Alyssa Pyun compared with the California median for vascular surgeons, 2024

  • Alyssa Pyun
  • California median
Medicare services
123vs 60980% below
Medicare patients
124vs 27254% below

Medians across 499 vascular surgeons in California with Dmand AI profiles that report each measure.

Alyssa Pyun'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 Alyssa Pyun

Need commercial claims for Alyssa Pyun?

Medicare shows one payer. Book a meeting to get commercial claims data for Alyssa Pyun and other vascular surgeons in California.

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

Alyssa Pyun treated 124 Medicare patients in 2024, average age 71

CMS counts 124 Medicare patients who saw Alyssa Pyun in 2024. The largest group is 65 to 74, with 54 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 55% are also on Medicaid. Their average risk score is 3.47, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Alyssa Pyun's median patient age at 69, with 38% women.

Medicare patients, 2024124
Average age71
Average risk score3.47
Also on Medicaid55%

Alyssa Pyun's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Alyssa Pyun's Medicare patients by sex, 2024

  • Women5141%
  • Men7359%

Chronic conditions among Alyssa Pyun's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis64%
  4. Ischemic heart disease63%
  5. Diabetes57%
  6. Chronic kidney disease56%
  7. Heart failure52%
  8. Atrial fibrillation42%

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

Alyssa Pyun's patients across all payers

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

Patient panel by age, all payers

Median age 69

Patient panel by sex, all payers

  • Women38%
  • Men62%

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

Alyssa Pyun ranks in the 49th percentile for spinal fusion in Medicare

Alyssa Pyun accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Alyssa Pyun as offering telehealth. CMS counts 37 procedures of spinal fusion by Alyssa Pyun, more than 49% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Where Alyssa Pyun ranks in Medicare procedure volume

Spinal fusion
49th percentile37 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Leg revascularization (restoring blood flow): 1 to 10 procedures (CMS shows small counts as a range)

Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Alyssa Pyun has 1 publication on record

Dmand AI links 1 paper to Alyssa Pyun in 2025. Alyssa Pyun's most frequent co-authors are Mahmoud W. Almadani, MD, Erin M. Moore, MD and Patrick E. Muck, MD.

Papers1

Alyssa Pyun's most frequent co-authors

Recent publications by Alyssa Pyun

See all 1 publications and co-authors

See who Alyssa Pyun researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Alyssa Pyun works with, so you can find a warm path to the right vascular surgeons.

How network discovery works

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

Alyssa Pyun received $14,466 in industry payments from 2021 to 2025

CMS Open Payments shows 73 general payments to Alyssa Pyun from 11 drug and device companies from 2021 to 2025. Consulting fees make up the largest share, 39% of the total. Medtronic, Inc. paid the most, $8,278.

General payments to Alyssa Pyun by program year, 2021 to 2025

General payments to Alyssa Pyun by kind, 2021 to 2025

$14.5Kin total
  • Consulting fees$5,67039%
  • Food and beverage$4,93534%
  • Travel and lodging$3,35723%
  • Education$5043%

Companies that paid Alyssa Pyun the most, 2021 to 2025

Share is of all general payments to this clinician.

See all payments to Alyssa Pyun

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

Alyssa Pyun graduated from University Of Cincinnati College Of Medicine

Alyssa Pyun graduated from University Of Cincinnati College Of Medicine in 2017.

  1. Medical schoolUniversity Of Cincinnati College Of Medicine
  2. Board certified in vascular surgeryAmerican Board of Surgery

Source: Dmand AI Professional Profile Data

Alyssa Pyun accepts plans from 6 insurance carriers

Alyssa Pyun is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • CMS Medicare

Plan types Alyssa Pyun accepts, by number of carriers

  1. Medicare6
  2. PPO5
  3. HMO2
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Alyssa Pyun'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 phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand 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)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 Alyssa Pyun

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

What is Alyssa Pyun's NPI number?

Alyssa Pyun's NPI number is 1215469945. It was assigned on March 31, 2017, and it is active in the NPI Registry.

What does Alyssa Pyun specialize in?

Alyssa Pyun is a vascular surgeon in Los Angeles, California. The primary specialty in the NPI Registry is Vascular Surgery Physician (taxonomy code 2086S0129X).

Where does Alyssa Pyun practice?

Alyssa Pyun practices at 1500 San Pablo Street, Los Angeles, CA 90033. Alyssa Pyun's primary practice is Keck Hospital of USC in Los Angeles, California, part of University of Southern California. Dmand AI also links Alyssa Pyun to 1 group practice or clinic, 1 other site and 1 urgent care center.

What is Alyssa Pyun's office phone number?

The practice phone on file for Alyssa Pyun is (323) 442-8656.

What is Alyssa Pyun's medical license number?

Alyssa Pyun holds California license A162887.

Which hospitals is Alyssa Pyun affiliated with?

Alyssa Pyun practices at Keck Hospital of USC in Los Angeles, California. Alyssa Pyun is also affiliated with Los Angeles General Medical Center.

What medical group is Alyssa Pyun part of?

Alyssa Pyun is linked to USC Care Medical Group.

Does Alyssa Pyun accept Medicare?

Yes. CMS data shows Alyssa Pyun billed Medicare for 123 services in 2024, and Alyssa Pyun accepts Medicare assignment.

Does Alyssa Pyun offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Alyssa Pyun as offering telehealth services.

How many Medicare patients does Alyssa Pyun see?

CMS counts 124 Medicare patients who saw Alyssa Pyun in 2024, with an average age of 71.

Show 8 more questionsShow fewer questions

Is Alyssa Pyun board certified?

Yes. Alyssa Pyun is board certified in vascular surgery by the American Board of Surgery.

What services does Alyssa Pyun bill to Medicare?

In 2024, Alyssa Pyun's most billed Medicare services were office visit, new patient (99204), office visit, established patient (99214) and surgery: heart and blood vessels (34713).

Where did Alyssa Pyun go to medical school?

Alyssa Pyun graduated from University Of Cincinnati College Of Medicine in 2017.

Has Alyssa Pyun received payments from drug or device companies?

CMS Open Payments shows $14,466 in general payments to Alyssa Pyun from 11 companies from 2021 to 2025. The largest total came from Medtronic, Inc.

How long has Alyssa Pyun been practicing?

Alyssa Pyun graduated from medical school in 2017, 9 years ago.

Does Alyssa Pyun do research?

Dmand AI links 1 publication to Alyssa Pyun.

Who does Alyssa Pyun publish with?

Alyssa Pyun's most frequent co-authors are Mahmoud W. Almadani, MD (1 shared paper), Erin M. Moore, MD (1 shared paper) and Patrick E. Muck, MD (1 shared paper).

What insurance does Alyssa Pyun accept?

Alyssa Pyun is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

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