David Wallace , PA-C
Physician Assistant β’ Northridge, CA
18350 Roscoe Blvd # 702
Northridge, CA 913254109
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 July 30, 2021; this date does not establish years in practice.
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Published CMS data list 856 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Pantoprazole Sodium β 193 prescription fills, including refills.
- Dicyclomine Hcl β 94 prescription fills, including refills.
- Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) β 85 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 20 records in the table Β· Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Northridge, CA (2024, 16 clinicians with data). Median for this group: 217. Middle half: 112 to 807.
More Part D prescriptions than 75% of clinicians listed under Physician Assistant in California (2024, 7,546 clinicians with data). Median for this group: 228. Middle half: 72 to 717.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 67 in 2021 to 856 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2021β2024.
Practice Location & Contact Primary Location
18350 Roscoe Blvd # 702
Northridge, CA 913254109
NPPES lists 1 additional practice-address record in Culver City, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: United Medical Doctors. 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
2021
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
1,298 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
$190,378 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 β by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $1,399.47 across 58 records.
By nature of payment
- Food and Beverage: $1,399.47 across 58 records.
Reporting-company totals (3 largest of 17)
- Madrigal Pharmaceuticals: $249.15 across 12 records.
- Salix Pharmaceuticals, a division of Bausch Health US, LLC: $199.40 across 10 records.
- ABBVIE INC.: $193.67 across 8 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
5 years (graduated 2021)
CMS Doctors and Clinicians data list 2021 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
2021
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, 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, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
David Wallace 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 David Wallace 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 Northridge and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Northridge, CA (2024, 16 clinicians with data). Median for this group: 217. Middle half: 112 to 807.
More Part D prescriptions than 75% 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 90% of clinicians listed under Physician Assistant in Northridge, CA (2024, 16 clinicians with data). Median for this group: $4,089. Middle half: $1,139 to $31,912.
A higher Part D drug cost than 85% 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.
23 active clinicians are listed under Physician Assistant with a practice address in Northridge, CA (14,777 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Northridge
8.7% of these 23 clinicians have the CMS telehealth indicator.
52.2% of these 23 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 increased 1178% from 67 in 2021 to 856 in 2024.
- 2021: 67
- 2022: 597
- 2023: 738
- 2024: 856
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30-day fills
30-day fills increased 1503% from 81 in 2021 to 1,298 in 2024.
- 2021: 81
- 2022: 826
- 2023: 1,109
- 2024: 1,298
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Part D drug cost
Part D drug cost increased 4914% from $3,797 in 2021 to $190,378 in 2024.
- 2021: $3,797
- 2022: $87,051
- 2023: $182,987
- 2024: $190,378
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $49.61 in 2021 to $1,399.47 in 2025.
- 2021: $49.61
- 2022: $709.54
- 2023: $880.58
- 2024: $1,411.21
- 2025: $1,399.47
Sources: 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 Β· 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 β December 31, 2025): 58 records totaling $1,399.47.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
|
REZDIFFRA | General | $45.43 |
| QOL Medical, LLC |
Food and Beverage
In-kind items and services
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Sucraid | General | $42.46 |
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
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REZDIFFRA | General | $41.76 |
| Takeda Pharmaceuticals U.S.A., Inc. |
Food and Beverage
In-kind items and services
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ENTYVIO | General | $39.73 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $34.75 |
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
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REZDIFFRA | General | $34.65 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $33.95 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
CREON | General | $33.64 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $32.66 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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LINZESS | General | $32.54 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $31.70 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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TREMFYA | General | $31.54 |
| Takeda Pharmaceuticals U.S.A., Inc. |
Food and Beverage
In-kind items and services
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ENTYVIO | General | $31.49 |
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
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REZDIFFRA | General | $30.29 |
| QOL Medical, LLC |
Food and Beverage
In-kind items and services
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Sucraid | General | $30.00 |
| Otsuka America Pharmaceutical, Inc. |
Food and Beverage
In-kind items and services
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REXULTI | General | $29.87 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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LINZESS | General | $29.29 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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LINZESS | General | $29.05 |
| Lundbeck LLC |
Food and Beverage
Cash or cash equivalent
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REXULTI | General | $28.95 |
| Almatica Pharma LLC |
Food and Beverage
In-kind items and services
|
LOREEV XR | General | $28.57 |
| Takeda Pharmaceuticals U.S.A., Inc. |
Food and Beverage
In-kind items and services
|
ENTYVIO | General | $27.94 |
| Axsome Therapeutics, Inc. |
Food and Beverage
In-kind items and services
|
Auvelity | General | $27.68 |
| Almatica Pharma LLC |
Food and Beverage
In-kind items and services
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LOREEV XR | General | $26.81 |
| Lundbeck LLC |
Food and Beverage
Cash or cash equivalent
|
REXULTI | General | $26.28 |
| Ipsen Biopharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
IQIRVO | General | $25.78 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
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 |
|---|---|---|---|---|---|
| Pantoprazole Sodium | Pantoprazole Sodium | 193 | 11,332 | $1,814.72 | 93 |
| Dicyclomine Hcl | Dicyclomine Hcl | 94 | 1,311 | $900.67 | 44 |
| Gavilyte-G | Peg3350/Sod Sulf,bicarb,cl/Kcl | 85 | 96 | $1,238.10 | 82 |
| Omeprazole | Omeprazole | 78 | 5,491 | $806.75 | 27 |
| Linzess | Linaclotide | 76 | 3,720 | $67,147.07 | 29 |
| Famotidine | Famotidine | 51 | 3,252 | $544.33 | 20 |
| Sutab | Sod Sulf/Pot Chloride/Mag Sulf | 41 | 134 | $6,715.76 | 41 |
| Lubiprostone | Lubiprostone | 40 | 1,445 | $7,283.56 | β |
| Creon | Lipase/Protease/Amylase | 39 | 1,255 | $55,560.41 | 11 |
| Peg-3350 And Electrolytes | Peg3350/Sod Sulf,bicarb,cl/Kcl | 20 | 27 | $399.24 | 19 |
| Mesalamine | Mesalamine | 18 | 960 | $6,013.02 | β |
| Clarithromycin | Clarithromycin | 17 | 238 | $378.06 | 17 |
| Xifaxan | Rifaximin | 16 | 272 | $39,864.20 | β |
| Amoxicillin | Amoxicillin | 15 | 210 | $48.42 | 15 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 15 | 697 | $434.59 | β |
| Sod Sulf-Potass Sulf-Mag Sulf | Sodium, Potassium,mag Sulfates | 14 | 48 | $825.23 | 14 |
| Hydrocortisone | Hydrocortisone | 11 | 250 | $180.39 | β |
| Ondansetron Odt | Ondansetron | 11 | 144 | $130.83 | β |
| Lactulose | Lactulose | 11 | 15 | $18.82 | β |
| Enulose | Lactulose | 11 | 117 | $73.47 | β |
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: 2025-08-28NUCC 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
I20250925003294
CA
8325543770
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
United Medical Doctors
400 Newport Ctr Dr, Newport Beach, CA 926607695
Phone: 9497600398
Secondary Practice Locations
5555 Inglewood Blvd
Culver City, CA 902306226
Phone: 4245321552
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Internal Medicine - Gastroenterology
Doctor of Osteopathic Medicine (D.O.)
Internal Medicine - Gastroenterology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 18350 ROSCOE BLVD # 702, NORTHRIDGE, CA 913254109 (Tel: 8182805961)
Additional practice office at 5555 Inglewood Blvd, Culver City, CA 902306226
NPI status registered as active in NPPES database
Registered at 18350 ROSCOE BLVD # 702, NORTHRIDGE, CA 913254109 (Tel: 8182805961)
Registered at 793 ELM ST APT 7, SAN CARLOS, CA 940703076 (Tel: 6508629145)
Recorded as DAVID WALLACE, PA-C
Physician Assistant (license number reported to NPPES: CA PA59863)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Northridge
- Sylva Garagulakian, PA-C
- Mark Ramos, PA
- Jessica Thwaite, PA-C
- Natalie Samuelian, PA-C
- Valerie Van Dellen, PA-C
- Hannah Eicher
Mailing Address
18350 Roscoe Blvd # 702
Northridge, CA 913254109
Phone: 8182805961