Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Jonathan Robert Cox , PA

Physician Assistant • Apple Valley, CA

Active NPI 1720341555 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

18523 Corwin Rd Ste G
Apple Valley, CA 92307

Call 7602423376 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

18523 Corwin Rd Ste G

Apple Valley, CA 92307

Telephone 7602423376
Other Listings in Public Data

NPPES lists 1 additional practice-address record in Murray, UT. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

CMS Doctors and Clinicians lists 1 group name: Advanced Dermatology Of Colorado Pc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Graduation Year

2011

Medicare patients

463 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.

Medicare-allowed amount

About $159,738 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.

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 – by Provider and Service, 2024.

Paid by Medicare

About $112,156 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

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 – by Provider and Service, 2024.

30-day fills

795 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

$157,297 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

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 – by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $47,550.33 across 291 records.

By nature of payment (3 largest of 4)

  • Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program: $38,505.00 across 23 records.
  • Food and Beverage: $6,242.26 across 237 records.
  • Travel and Lodging: $2,638.08 across 29 records.

Reporting-company totals (3 largest of 22)

  • UCB, Inc.: $23,808.58 across 75 records.
  • Janssen Pharmaceuticals, Inc: $19,977.73 across 45 records.
  • Sanofi and Genzyme US Companies: $815.70 across 17 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.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

15 years (graduated 2011)

CMS Doctors and Clinicians data list 2011 as the year this clinician finished professional 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.

NPI first issued

2012

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.

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, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

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.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Jonathan Cox 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.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Jonathan Cox 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.

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.

Guide: What ordering and referring status means

Compared with the same specialty in Apple Valley 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 Apple Valley, CA (2024, 15 clinicians with data). Median for this group: 200. Middle half: 133 to 318.

More Medicare Part B services than 90% of clinicians listed under Physician Assistant in California (2024, 4,833 clinicians with data). Median for this group: 198. Middle half: 71 to 535.

Medicare-allowed amount

A higher Medicare-allowed amount than 95% of clinicians listed under Physician Assistant in Apple Valley, CA (2024, 15 clinicians with data). Median for this group: $20,329. Middle half: $14,954 to $29,107.

A higher Medicare-allowed amount than 90% of clinicians listed under Physician Assistant in California (2024, 4,833 clinicians with data). Median for this group: $18,173. Middle half: $6,666 to $41,587.

Paid by Medicare

A higher Medicare payment amount than 95% of clinicians listed under Physician Assistant in Apple Valley, CA (2024, 15 clinicians with data). Median for this group: $15,175. Middle half: $10,612 to $22,257.

A higher Medicare payment amount than 90% of clinicians listed under Physician Assistant in California (2024, 4,833 clinicians with data). Median for this group: $13,209. Middle half: $4,792 to $30,879.

Medicare Part D prescriptions

More Part D prescriptions than 85% of clinicians listed under Physician Assistant in Apple Valley, CA (2024, 22 clinicians with data). Median for this group: 209. Middle half: 52 to 606.

More Part D prescriptions than 70% of clinicians listed under Physician Assistant in California (2024, 7,516 clinicians with data). Median for this group: 229. Middle half: 72 to 718.

Part D drug cost

A higher Part D drug cost than 85% of clinicians listed under Physician Assistant in Apple Valley, CA (2024, 22 clinicians with data). Median for this group: $1,363. Middle half: $551 to $5,381.

A higher Part D drug cost than 80% of clinicians listed under Physician Assistant in California (2024, 7,516 clinicians with data). Median for this group: $3,945. Middle half: $709 to $60,209.

30 active clinicians are listed under Physician Assistant with a practice address in Apple Valley, CA (14,458 in California).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Apple Valley

6.7% of these 30 clinicians have the CMS telehealth indicator.

36.7% of these 30 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · 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

Open Payments · Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – December 31, 2025): 291 records totaling $47,550.33.

Manufacturer Payment Nature Product Type Amount ($)
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $4,300.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $3,200.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $3,200.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $3,192.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $2,975.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $2,975.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $2,200.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $2,025.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $2,025.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $2,025.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $950.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $950.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $950.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $950.00
UCB, Inc.
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
Bimzelx General $950.00
Janssen Pharmaceuticals, Inc
Travel and Lodging
In-kind items and services
TREMFYA General $921.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $900.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $900.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $850.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $675.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $675.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $675.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $563.00
Janssen Pharmaceuticals, Inc
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
TREMFYA General $400.00
UCB, Inc.
Travel and Lodging
In-kind items and services
Bimzelx General $333.16

(top 25 shown)

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B · Data Year 2024
Reporting Year:

CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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
17003 Destruction of precancer skin growth, 2-14 growths
705 116 $25.00 $5.81
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
431 309 $318.00 $77.41
17004 Destruction of precancer skin growth, 15 or more growths
207 148 $617.00 $143.90
17000 Destruction of precancer skin growth, 1 growth
178 150 $245.00 $43.48
11102 Biopsy of related skin growth, first growth
161 136 $380.00 $72.91
17110 Destruction of skin growth, 1-14 growths
125 106 $420.00 $93.89
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
104 79 $446.00 $108.84
11103 Biopsy of related skin growth, each additional growth
94 46 $189.00 $42.48
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
74 74 $393.00 $95.19
17111 Destruction of skin growth, 15 or more growths
66 50 $488.00 $115.37
J7308 Aminolevulinic acid hcl for topical administration, 20%, single unit dosage form (354 mg)
29 26 $938.52 $389.68
96574 Application of light with debridement to destroy precancer skin growth
28 26 $1074.00 $242.44
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
23 21 $201.00 $48.45
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm
22 22 $891.00 $110.33
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg
17 12 $4.00 $1.01
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
16 16 $582.00 $142.41
11900 Injection into skin growth, 1-7 growths
13 11 $207.00 $36.31
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm
11 11 $1113.00 $262.59
13121 Complicated repair of wound of scalp, arms, or legs, 2.6-7.5 cm
11 11 $1558.00 $365.34

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.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Triamcinolone Acetonide Triamcinolone Acetonide 133 4,308 $1,586.97 89
Ketoconazole Ketoconazole 112 3,817 $1,857.49 71
Doxycycline Hyclate Doxycycline Hyclate 67 817 $863.36 58
Clobetasol Propionate Clobetasol Propionate 65 1,828 $2,365.67 42
Mupirocin Mupirocin 41 782 $397.17 34
Hydrocortisone Hydrocortisone 34 896 $286.88 25
Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim 25 199 $139.89 21
Valacyclovir Valacyclovir Hcl 25 822 $1,160.48 17
Clindamycin Phosphate Clindamycin Phosphate 23 870 $1,093.06 15
Ssd Silver Sulfadiazine 22 530 $178.00 —
Minoxidil Minoxidil 21 1,373 $120.89 —
Prednisone Prednisone 19 376 $109.79 14
Cephalexin Cephalexin 19 147 $209.83 17
Spironolactone Spironolactone 16 840 $247.01 —
Opzelura Ruxolitinib Phosphate 14 540 $26,945.32 —
Ciclopirox Ciclopirox 13 364 $273.15 —
Cosentyx Unoready Pen Secukinumab 13 364 $118,280.64 —
Tacrolimus Tacrolimus 12 310 $1,181.43 —

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

Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

License # reported to NPPES CA 53066

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.

Dermatology

NUCC Taxonomy Code: 207N00000X

License # reported to NPPES NV PA1460

A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.

Physician Assistant

NUCC Taxonomy Code: 363A00000X

License # reported to NPPES NV PA1460

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Medical Board of California.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - PHYSICIAN ASSISTANT

Medicare Enrollment ID

I20221214000059

Enrollment State Jurisdiction

CO

PECOS Control ID

5193974996

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

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

Advanced Dermatology Of Colorado Pc

1960 N Ogden St, Denver, CO 802183602

Phone: 3038300400

Advanced Dermatology Of Colorado Pc

1100 Poudre River Dr, Fort Collins, CO 805243557

Phone: 9704843050

Advanced Dermatology Of Colorado Pc

3540 S Poplar St, Denver, CO 802371364

Phone: 3038509715

Secondary Practice Locations

5169 Cottonwood St, Suite 520

Murray, UT 84107

Phone: 8015073555

5169 Cottonwood St, Suite 520

Murray, UT 84107

Phone: 8015073555

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

1 listed
John Nicolaisen , PA

Physician Assistant - Medical

NPI 1548666738

Physician Assistant

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

13 Historical Events
📍
Updated Practice Location August 30, 2019

Registered at 18523 CORWIN RD STE G, APPLE VALLEY, CA 92307 (Tel: 7602423376)

📍
Updated Business Mailing Address August 30, 2019

Registered at 18523 CORWIN RD STE G, APPLE VALLEY, CA 923072300 (Tel: 7602423376)

âś…
NPI Profile Active October 31, 2017

NPI status registered as active in NPPES database

📍
Updated Business Mailing Address October 31, 2017

Registered at 2409 ARTESIA BLVD FL 2, REDONDO BEACH, CA 902783207

📍
Updated Practice Location October 31, 2017

Registered at 5169 COTTONWOOD ST, SUITE 520, MURRAY, UT 841076767 (Tel: 8015073555)

👤
Provider Name / Credentials Updated October 31, 2017

Recorded as JONATHAN COX, PA

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) October 31, 2017

Dermatology (license number reported to NPPES: NV PA1460)

âś…
NPI Profile Active June 18, 2012

NPI status registered as active in NPPES database

📍
Practice Location (Initial Record) June 18, 2012

Registered at 5169 COTTONWOOD ST, SUITE 520, MURRAY, UT 841076767 (Tel: 8015073555)

📍
Business Mailing Address (Initial Record) June 18, 2012

Registered at 9906 S 2700 E, SANDY, UT 840924231 (Tel: 8018605221)

👤
Provider Name / Credentials (Initial Record) June 18, 2012

Recorded as JONATHAN COX, PA

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) June 18, 2012

Physician Assistant (license number reported to NPPES: UT 8349128-1206)

🟢
Initial NPI Registration & Enumeration June 18, 2012

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1720341555
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: June 18, 2012
Last Update: August 30, 2019
Sole Proprietor: No

Other Physician Assistants in Apple Valley

All Physician Assistants in Apple Valley

Mailing Address

18523 Corwin Rd Ste G

Apple Valley, CA 923072300

Phone: 7602423376

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.