Sandra Ileana Diaz O'donnell , PA-C
Physician Assistant โข Pasadena, CA
401 S Fair Oaks Ave
Pasadena, CA 911052603
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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Sandra O'Donnell is listed in NPPES under Physician Assistant.
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NPI assigned on April 11, 2006; this date does not establish years in practice.
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Published CMS data list 1,923 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 17003 โ Destruction of precancer skin growth, 2-14 growths: 728 service units.
- 99213 โ Established patient outpatient office visit: 391 service units.
- 17000 โ Destruction of precancer skin growth, 1 growth: 226 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 12 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 580 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Ketoconazole โ 134 prescription fills, including refills.
- Triamcinolone Acetonide โ 81 prescription fills, including refills.
- Mometasone Furoate โ 80 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 13 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 95% of clinicians listed under Physician Assistant in Pasadena, CA (2024, 31 clinicians with data). Median for this group: 281. Middle half: 103 to 558.
More Medicare Part B services than 90% of clinicians listed under Physician Assistant in California (2024, 4,851 clinicians with data). Median for this group: 198. Middle half: 71 to 531.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 708 in 2020 to 1,923 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
401 S Fair Oaks Ave
Pasadena, CA 911052603
NPPES lists 2 distinct additional practice-address records in Arcadia, CA; Pasadena, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Csi Medical Group. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
University Of Southern California Keck School Of Medicine
1993
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
292 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $104,060 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $76,317 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
588 standardized 30-day fills in 2024
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
$17,222 in 2024
The total cost of these prescriptions in 2024, 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 โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $2,312.03 across 60 records.
By nature of payment
- Food and Beverage: $2,312.03 across 60 records.
Reporting-company totals (3 largest of 13)
- Galderma Laboratories, L.P.: $644.45 across 9 records.
- Arcutis Biotherapeutics, Inc.: $386.11 across 9 records.
- ABBVIE INC.: $360.85 across 16 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
33 years (graduated 1993)
CMS Doctors and Clinicians data list 1993 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
NPI first issued
2006
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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, CMS release of October 2, 2026; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
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, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Sandra O'Donnell has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Sandra O'Donnell as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Pasadena and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Physician Assistant in Pasadena, CA (2024, 31 clinicians with data). Median for this group: 281. Middle half: 103 to 558.
More Medicare Part B services than 90% of clinicians listed under Physician Assistant in California (2024, 4,851 clinicians with data). Median for this group: 198. Middle half: 71 to 531.
Medicare-allowed amount
A higher Medicare-allowed amount than 90% of clinicians listed under Physician Assistant in Pasadena, CA (2024, 31 clinicians with data). Median for this group: $22,697. Middle half: $7,628 to $31,102.
A higher Medicare-allowed amount than 90% of clinicians listed under Physician Assistant in California (2024, 4,851 clinicians with data). Median for this group: $18,128. Middle half: $6,643 to $41,350.
Paid by Medicare
A higher Medicare payment amount than 90% of clinicians listed under Physician Assistant in Pasadena, CA (2024, 31 clinicians with data). Median for this group: $16,605. Middle half: $5,757 to $24,153.
A higher Medicare payment amount than 90% of clinicians listed under Physician Assistant in California (2024, 4,851 clinicians with data). Median for this group: $13,180. Middle half: $4,773 to $30,781.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Pasadena, CA (2024, 49 clinicians with data). Median for this group: 162. Middle half: 44 to 523.
More Part D prescriptions than 70% of clinicians listed under Physician Assistant in California (2024, 7,546 clinicians with data). Median for this group: 228. Middle half: 72 to 717.
Part D drug cost
A higher Part D drug cost than 75% of clinicians listed under Physician Assistant in Pasadena, CA (2024, 49 clinicians with data). Median for this group: $2,580. Middle half: $235 to $14,702.
A higher Part D drug cost than 60% of clinicians listed under Physician Assistant in California (2024, 7,546 clinicians with data). Median for this group: $3,944. Middle half: $710 to $60,219.
91 active clinicians are listed under Physician Assistant with a practice address in Pasadena, CA (14,777 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Pasadena
9.9% of these 91 clinicians have the CMS telehealth indicator.
44% of these 91 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 B services
Medicare Part B services increased 172% from 708 in 2020 to 1,923 in 2024.
- 2020: 708
- 2021: 824
- 2022: 601
- 2023: 1,574
- 2024: 1,923
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Medicare-allowed amount
Medicare-allowed amount increased 263% from $28,629 in 2020 to $104,060 in 2024.
- 2020: $28,629
- 2021: $40,925
- 2022: $27,373
- 2023: $81,010
- 2024: $104,060
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Paid by Medicare
Paid by Medicare increased 281% from $20,027 in 2020 to $76,317 in 2024.
- 2020: $20,027
- 2021: $29,702
- 2022: $19,387
- 2023: $58,382
- 2024: $76,317
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 538 in 2020 and 580 in 2024.
- 2020: 538
- 2021: 588
- 2022: 295
- 2023: 413
- 2024: 580
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30-day fills
30-day fills varied from year to year: 558 in 2020 and 588 in 2024.
- 2020: 558
- 2021: 609
- 2022: 310
- 2023: 429
- 2024: 588
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Part D drug cost
Part D drug cost decreased 60% from $43,421 in 2020 to $17,222 in 2024.
- 2020: $43,421
- 2021: $153,500
- 2022: $61,898
- 2023: $21,377
- 2024: $17,222
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $114.61 in 2021 to $2,312.03 in 2025.
- 2021: $114.61
- 2022: $481.93
- 2023: $1,958.55
- 2024: $1,532.87
- 2025: $2,312.03
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 60 records totaling $2,312.03.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Arcutis Biotherapeutics, Inc. |
Food and Beverage
In-kind items and services
|
Zoryve | General | $155.37 |
| SUN PHARMACEUTICAL INDUSTRIES INC. |
Food and Beverage
In-kind items and services
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ILUMYA | General | $155.36 |
| Arcutis Biotherapeutics, Inc. |
Food and Beverage
In-kind items and services
|
Zoryve | General | $150.00 |
| Galderma Laboratories, L.P. |
Food and Beverage
In-kind items and services
|
NEMLUVIO | General | $142.66 |
| Galderma Laboratories, L.P. |
Food and Beverage
In-kind items and services
|
NEMLUVIO | General | $135.24 |
| Galderma Laboratories, L.P. |
Food and Beverage
In-kind items and services
|
NEMLUVIO | General | $128.15 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
SKYRIZI | General | $124.99 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $105.05 |
| Galderma Laboratories, L.P. |
Food and Beverage
In-kind items and services
|
NEMLUVIO | General | $102.62 |
| Galderma Laboratories, L.P. |
Food and Beverage
In-kind items and services
|
NEMLUVIO | General | $75.75 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
|
Rhapsido | General | $67.48 |
| LEO Pharma Inc. |
Food and Beverage
In-kind items and services
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ANZUPGO | General | $52.45 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
TALTZ | General | $32.78 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
TALTZ | General | $30.89 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
TALTZ | General | $30.84 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $30.13 |
| LEO Pharma Inc. |
Food and Beverage
In-kind items and services
|
ANZUPGO | General | $29.87 |
| Incyte Corporation |
Food and Beverage
Cash or cash equivalent
|
OPZELURA | General | $29.74 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
LIBTAYO | General | $28.64 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
SKYRIZI | General | $28.51 |
| Incyte Corporation |
Food and Beverage
Cash or cash equivalent
|
OPZELURA | General | $28.37 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
CIBINQO | General | $28.21 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
SKYRIZI | General | $28.06 |
| KYOWA KIRIN, INC. |
Food and Beverage
In-kind items and services
|
POTELIGEO | General | $27.39 |
| LEO Pharma Inc. |
Food and Beverage
In-kind items and services
|
ADBRY | General | $26.69 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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17003
Destruction of precancer skin growth, 2-14 growths
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728 | 100 | $15.00 | $6.46 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
391 | 198 | $165.00 | $83.57 |
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17000
Destruction of precancer skin growth, 1 growth
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226 | 131 | $130.00 | $51.76 |
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11102
Biopsy of related skin growth, first growth
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125 | 100 | $201.84 | $86.39 |
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17110
Destruction of skin growth, 1-14 growths
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101 | 69 | $245.79 | $109.91 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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92 | 58 | $235.00 | $117.72 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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80 | 55 | $105.00 | $52.59 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
73 | 73 | $200.41 | $102.37 |
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11103
Biopsy of related skin growth, each additional growth
|
70 | 34 | $101.00 | $47.82 |
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17004
Destruction of precancer skin growth, 15 or more growths
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13 | 12 | $325.00 | $159.52 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
13 | 13 | $300.00 | $152.77 |
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12032
Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm
|
11 | 11 | $592.73 | $287.85 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Ketoconazole | Ketoconazole | 134 | 3,703 | $1,727.40 | 51 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 81 | 2,175 | $400.48 | 57 |
| Mometasone Furoate | Mometasone Furoate | 80 | 2,093 | $1,505.69 | 47 |
| Clobetasol Propionate | Clobetasol Propionate | 46 | 1,264 | $3,246.09 | 23 |
| Doxycycline Hyclate | Doxycycline Hyclate | 42 | 1,037 | $722.56 | 30 |
| Mupirocin | Mupirocin | 42 | 946 | $227.37 | 27 |
| Ciclopirox | Ciclopirox | 38 | 1,140 | $1,025.36 | 22 |
| Metronidazole | Metronidazole | 33 | 974 | $1,683.60 | 20 |
| Clindamycin Phosphate | Clindamycin Phosphate | 23 | 690 | $428.12 | โ |
| Fluorouracil | Fluorouracil | 22 | 652 | $1,881.48 | 18 |
| Tacrolimus | Tacrolimus | 17 | 502 | $3,513.41 | 12 |
| Permethrin | Permethrin | 11 | 220 | $797.87 | โ |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 11 | 274 | $62.08 | โ |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2022-08-19NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20040729000869
CA
0143290841
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Csi Medical Group
289 W Huntington Dr, Arcadia, CA 910073495
Phone: 6264468809
Csi Medical Group
4201 Torrance Blvd, Torrance, CA 905034524
Phone: 3105434444
Secondary Practice Locations
10 Congress St Ste 320
Pasadena, CA 911053084
Phone: 6265859474
289 W Huntington Dr Ste 208
Arcadia, CA 910073495
Phone: 6264468809
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Additional practice office at 10 Congress St Ste 320, Pasadena, CA 911053084
Additional practice office at 289 W Huntington Dr Ste 208, Arcadia, CA 910073495
Recorded as SANDRA O'DONNELL, PA-C
NPI status registered as active in NPPES database
Registered at 401 S FAIR OAKS AVE, PASADENA, CA 911052603 (Tel: 6267952244)
Registered at 401 S FAIR OAKS AVE, PASADENA, CA 911052603 (Tel: 6267952244)
Recorded as SANDRA DIAZ, PA-C
Physician Assistant (license number reported to NPPES: CA PA13219)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Pasadena
- Tiffany Smith, PA-C
- Sofia Ryan, PA
- Melissa Real
- Phuong Tang, PA
- Kelsey Hochleitner, PA
- Oscar Bach, PA
Mailing Address
401 S Fair Oaks Ave
Pasadena, CA 911052603
Phone: 6267952244