Kerwin Rommel Murillo Perez
Physician Assistant β’ Spring Valley, CA
8788 Jamacha Rd
Spring Valley, CA 919774035
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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Kerwin Rommel Perez is listed in NPPES under Physician Assistant.
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NPI assigned on September 18, 2023; this date does not establish years in practice.
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Published CMS data list 74 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:
- Atorvastatin Calcium β 21 prescription fills, including refills.
- Losartan Potassium β 16 prescription fills, including refills.
- Amlodipine Besylate β 13 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 5 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Fewer 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.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
Practice Location & Contact Primary Location
8788 Jamacha Rd
Spring Valley, CA 919774035
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
140 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
$436 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: $595.79 across 15 records.
By nature of payment
- Food and Beverage: $595.79 across 15 records.
Reporting-company totals (3 largest of 8)
- Novo Nordisk Inc: $424.32 across 7 records.
- Exact Sciences Corporation: $38.75 across 2 records.
- RedHill Biopharma Inc.: $33.62 across 1 record.
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).
NPI first issued
2023
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, 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)
Kerwin Rommel Perez 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 Kerwin Rommel Perez 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 Spring Valley and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer 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.
Too few clinicians listed under Physician Assistant in Spring Valley have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 80% 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.
Too few clinicians listed under Physician Assistant in Spring Valley have Medicare Part D data for 2024 to compare.
3 active clinicians are listed under Physician Assistant with a practice address in Spring Valley, CA (14,777 in California).
Addresses are self-reported to NPPES and may be out of date.
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
CMS data for Part D prescriptions are available for 2024 only.
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30-day fills
CMS data for 30-day fills are available for 2024 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2024 only.
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $15.56 in 2024 to $595.79 in 2025.
- 2024: $15.56
- 2025: $595.79
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): 15 records totaling $595.79.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $124.98 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $124.76 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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β | General | $90.72 |
| RedHill Biopharma Inc. |
Food and Beverage
Cash or cash equivalent
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Talicia | General | $33.62 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $29.65 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $25.63 |
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
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Veozah | General | $23.73 |
| HOLOGIC INC |
Food and Beverage
In-kind items and services
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APTIMA | General | $23.62 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $22.41 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $22.27 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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INVEGA SUSTENNA | General | $19.47 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $16.34 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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Kerendia | General | $16.23 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
MOUNJARO | General | $16.05 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
β | General | $6.31 |
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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 21 | 1,290 | $193.66 | β |
| Losartan Potassium | Losartan Potassium | 16 | 960 | $92.16 | β |
| Amlodipine Besylate | Amlodipine Besylate | 13 | 810 | $40.76 | β |
| Ibuprofen | Ibuprofen | 12 | 174 | $56.13 | β |
| Metformin Hcl | Metformin Hcl | 12 | 780 | $52.87 | 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: 2026-10-22NUCC 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
I20240513002127
CA
6406297118
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist
Doctor of Dental Surgery
Family Medicine
Doctor of Medicine (M.D.)
Physician Assistant - Medical
Physician Assistant (Certified)
Nurse Practitioner - Family
Family Nurse Practitioner
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
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 8788 JAMACHA RD, SPRING VALLEY, CA 919774035 (Tel: 6195152555)
Registered at 8788 JAMACHA RD, SPRING VALLEY, CA 919774035 (Tel: 3104980849)
Recorded as KERWIN ROMMEL PEREZ
Physician Assistant (license number reported to NPPES: CA 64172)
NPI status registered as active in NPPES database
Registered at 19815 ANNALEE AVE, CARSON, CA 907463146 (Tel: 3104980749)
Registered at 19815 ANNALEE AVE, CARSON, CA 907463146 (Tel: 3104980849)
Recorded as KERWIN PEREZ
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
8788 Jamacha Rd
Spring Valley, CA 919774035
Phone: 3104980849