Yumi So
Pharmacist β’ Pasadena, CA
155 S De Lacey Ave Apt 1000
Pasadena, CA 911054521
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on January 5, 2022; this date does not establish years in practice.
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Published CMS data list 83 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Arexvy (Rsvpref3 Antigen/As01e/Pf) β 47 prescription fills, including refills.
- Shingrix (Varicella-Zoster Ge/As01b/Pf) β 23 prescription fills, including refills.
- Boostrix Tdap (Diphth,pertuss(Acell),tet Vac) β 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 19 in 2022 to 83 in 2023.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2022β2023.
Practice Location & Contact Primary Location
155 S De Lacey Ave Apt 1000
Pasadena, CA 911054521
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Pasadena, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Pharmacist: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
83 standardized 30-day fills in 2023
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$20,465 in 2023
The total cost of these prescriptions in 2023, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023.
NPI first issued
2022
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Pasadena and California
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Yumi So are from 2023.
180 active clinicians are listed under Pharmacist with a practice address in Pasadena, CA (32,552 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Pasadena
0% of these 180 clinicians have the CMS telehealth indicator.
0% of these 180 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 19 in 2022 to 83 in 2023.
- 2022: 19
- 2023: 83
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30-day fills
30-day fills went from 19 in 2022 to 83 in 2023.
- 2022: 19
- 2023: 83
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Part D drug cost
Part D drug cost increased 457% from $3,671 in 2022 to $20,465 in 2023.
- 2022: $3,671
- 2023: $20,465
Sources: CMS Medicare Part D Prescribers (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Arexvy | Rsvpref3 Antigen/As01e/Pf | 47 | 47 | $14,673.82 | 47 |
| Shingrix | Varicella-Zoster Ge/As01b/Pf | 23 | 23 | $4,897.44 | 22 |
| Boostrix Tdap | Diphth,pertuss(Acell),tet Vac | 13 | 13 | $894.10 | 13 |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-08-06NUCC Taxonomy Code: 183500000X
An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is not limited to, assessment, interpretation, evaluation, and implementation, initiation, monitoring or modification of medication and or medical orders; the compounding or dispensing of medication and or medical orders; participation in drug and device procurement, storage, and selection; drug administration; drug regimen reviews; drug or drug-related research; provision of patient education and the provision of those acts or services necessary to provide medication therapy management services in all areas of patient care.
Secondary Practice Locations
2355 E Colorado Blvd
Pasadena, CA 911073644
Phone: 6267442619
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 155 S DE LACEY AVE APT 1000, PASADENA, CA 911054521 (Tel: 6268445000)
NPI status registered as active in NPPES database
Registered at 2355 E COLORADO BLVD, PASADENA, CA 911073644 (Tel: 6267442619)
Registered at 2657 MAYFIELD AVE, LA CRESCENTA, CA 912143815 (Tel: 2136043052)
Recorded as YUMI SO
Pharmacist (license number reported to NPPES: CA 85807)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Pharmacists in Pasadena
- Lisa Huang, RPH
- Dr. Jasmine Chen, PharmD, RPH
- Antranig Kaprielian
- Tracy Tran
- Dr. James Chang, PharmD
- Dr. Wanda Lewis, PharmD
Mailing Address
2657 Mayfield Ave
La Crescenta, CA 912143815
Phone: 2136043052