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Edit this profileAt a glance
- 18300 US Highway 18, Apple Valley, CA 92307
About Marshall Koon
Listed in the NPI registry as a physician assistant — medical, Marshall R. Koon, PA-C practices in Apple Valley, CA. According to Medicare claims data, Marshall cared for 34 Medicare patients across 35 services. The services billed most often include emergency department visit with moderate level of medical decision making and emergency department visit with high level of medical decision making. NPI 1982939302 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (760) 242-2311
- Email not available
Practice Locations
18300 US HIGHWAY 18
Apple Valley, CA 92307
Conditions and Services Within This Provider's Scope
Within Physician Assistant - Medical generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Common cold
- Diabetes
- Flu
- High blood pressure
- Sinus infection
- UTI
Allergies
Blood
Bone and joint
Digestive
- Acid reflux
- IBS
- Stomach Bug and Food Poisoning
Digestive health
- Constipation
- Fatty liver disease
- Hemorrhoids
Ear, Nose & Throat
- Ear infection
Endocrine
Eye Care
Foot and ankle
General Health
Hair and scalp
Headache and brain
Heart & Circulation
Hormones
- Perimenopause
- Testosterone deficiency
Infections
- Cellulitis
- COVID-19
- Herpes simplex of the skin
- Ringworm
- Strep throat
Injury
Men's Health
Mental Health
Metabolic
Nerve conditions
Neurology
- Dizziness and vertigo
- Migraines
Pain
- Gout
- Low back pain
- Osteoarthritis
- Whiplash
Respiratory
Sexual Health
Skin
Skin cancer
- Precancerous sun spot
Skin conditions
- Rosacea
Sleep
Women's Health
Procedures & services
Most searched procedures
- Annual physical exam
- Routine blood work
- Sick visit
- Sports physical
- Suture removal
- Vaccination
Allergies
- Allergy Testing and Shots
Counseling
Dermatology
- Cryotherapy for skin lesions
- Skin biopsy
- Skin Tag Removal
Diagnostic Tests
- COVID-19 Rapid Test
- Mono Rapid Test
- Rapid Flu Swab
- Rapid strep testing
- TB Skin Test
- Urine Drug Screen
- Urine Pregnancy Test
Ear, Nose & Throat
- Earwax removal
- Removal of Foreign Object from Ear or Nose
Evaluations
- Pre-Op Clearance Exam
Exams
- DOT Physical Exam
- Medicare annual wellness visit
- Pre-Employment Physical
- School and camp physical
General Care
- Prescription Refill Visit
- Wound Care and Dressing Change
Heart & Circulation
- EKG
Heart health
- Heart monitor
Hormones
- Hormone replacement therapy consult
Injections
- Bursa injection
- Joint injection or aspiration
- Vitamin B12 Injections
Injury Care
- Burn Treatment
- Splinting and temporary casting
Lab tests
- Cholesterol screening
- Hemoglobin A1c Test
- Thyroid Blood Test
- Urinalysis
Mental Health
- Depression screening
Metabolic
- Weight Loss Medication Consultation
Minor surgery
Minor Surgery
- Incision and drainage of an abscess
- Ingrown toenail removal
- Minor laceration repair
- Superficial foreign-body removal
Pain Management
Prevention
- Travel health clinic and vaccines
Respiratory
- Asthma Action Plan Consultation
- Nebulizer Breathing Treatment
Screening
- Blood Pressure Check and Monitoring
- STI and STD Screening
Skin procedures
- Mole Check
- Mole removal
- Wart Removal
Treatments
- IV hydration for cancer patients
Virtual care
- Virtual doctor visit
Women's Health
Women's health
Procedures Most Often Billed to Medicare
35 services · 34 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
23 | Less often than most peers in Physician Assistant — Medical |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
12 | Less often than most peers in Physician Assistant — Medical |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Common questions
What does Marshall R. Koon specialize in?
Marshall R. Koon is a physician assistant in Apple Valley, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Physician Assistant — Medical”.
NPI registry
Where is Marshall R. Koon located?
Marshall R. Koon is listed at 18300 US Highway 18, Apple Valley, CA 92307. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Marshall R. Koon's phone number?
The number on file is (760) 242-2311. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Marshall R. Koon's NPI number?
Marshall R. Koon's National Provider Identifier is 1982939302. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Marshall R. Koon been practicing?
Marshall R. Koon has 17+ years experience. Registered with an NPI since 2009. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Marshall R. Koon do most often?
According to Medicare billing data, Marshall R. Koon the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Marshall R. Koon confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Marshall R. Koon. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.