Dr. Phillip S. Key
- Gender: Male
- Experience: 33 years
- Graduated from: Harvard Medical School
- Graduation year: 1988
- Sole propriator: No
- NPI: 1780784355
Dr. Phillip S. Key MD
Otolaryngologist
He is located at 801 North 29th Street in Billings, MT 59101. Can help patients with the following: Chronic Rhinitis, Deafness, Hay Fever, Inner Ear Disorders, Middle Ear Infection, Vertigo. His National Provider Identifier (NPI) number is 1780784355. Appointment can be made via the phone number (406) 238-2500. He is affiliated with 3 practices and 1 hospitals.
Conditions treated
Dr. Phillip S. Key, being an otolaryngologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Phillip S. Key.
- Allergic Reaction
- Assistive Listening Devices
- Auditory Processing Disorder
- Aural Rehabilitation
- Bad Breath
- Cancer
- Cauliflower Ear
- Chronic Cough
- Chronic Rhinitis
- Cleft Palate and Cleft Lip
- Deafness
- Deviated Septum
- Dizziness
- Ear Infection
- Ear Wax
- Eustachian Tube Problems
- Eye Allergy
- Hay Fever
- Headache
- Hearing Conservation
- Impacted Earwax
- Inner Ear Disorders
- Laryngitis
- Middle Ear Infection
- Nasal Polyps
- Newborn or Infant Hearing Screening
- Noise Sensitivity
- Noise-Induced Hearing Loss (NIHL)
- Nosebleed
- Oral Cancer
- Otoacoustic Emission Test (OAE)
- Peripheral Nerve Tumors
- Sinus Tract
- Sinusitis
- Sleep Apnea
- Sleep Disorders
- Sore Throat
- Swallowing Disorders
- Swimmer's Ear
- Taste Disorders
- Tinnitus
- Tongue Problems
- Usher Syndrome
- Vertigo
- Vestibular Testing
Procedures Performed by Dr. Phillip S. Key
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Phillip S. Key as in-network for the following 2026 plans.
Health plans
Blue Cross and Blue Shield of Montana
Network data as of Jun 7, 2026, as reported by the insurer.
Show all 19 plans from Blue Cross and Blue Shield of Montana
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Blue Focus Bronze POS℠ 205 (3 plan variants) | POS · Expanded Bronze | Blue Focus POS | Accepting new patients |
| Blue Focus Bronze POS℠ 705 (3 plan variants) | POS · Bronze | Blue Focus POS | Accepting new patients |
| Blue Focus Bronze POS℠ Standard (3 plan variants) | POS · Expanded Bronze | Blue Focus POS | Accepting new patients |
| Blue Focus Gold POS℠ 207 (3 plan variants) | POS · Gold | Blue Focus POS | Accepting new patients |
| Blue Focus Gold POS℠ 902 (3 plan variants) | POS · Gold | Blue Focus POS | Accepting new patients |
| Blue Focus Gold POS℠ Standard (3 plan variants) | POS · Gold | Blue Focus POS | Accepting new patients |
| Blue Focus Silver POS℠ 206 (3 plan variants) | POS · Silver | Blue Focus POS | Accepting new patients |
| Blue Focus Silver POS℠ 903 (3 plan variants) | POS · Silver | Blue Focus POS | Accepting new patients |
| Blue Focus Silver POS℠ Standard (3 plan variants) | POS · Silver | Blue Focus POS | Accepting new patients |
| Blue Preferred Bronze PPO℠ 201 (4 plan variants) | PPO · Expanded Bronze | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Bronze PPO℠ 202 (4 plan variants) | PPO · Expanded Bronze | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Bronze PPO℠ Standard (4 plan variants) | PPO · Expanded Bronze | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Gold PPO℠ 204 (4 plan variants) | PPO · Gold | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Gold PPO℠ 901 (4 plan variants) | PPO · Gold | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Gold PPO℠ Standard (4 plan variants) | PPO · Gold | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Security PPO℠ 200 (4 plan variants) | PPO · Catastrophic | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Silver PPO℠ 203 (4 plan variants) | PPO · Silver | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Silver PPO℠ 308 (4 plan variants) | PPO · Silver | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Silver PPO℠ Standard (4 plan variants) | PPO · Silver | Blue Preferred PPO | Accepting new patients |
Mountain Health CO-OP
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 22 plans from Mountain Health CO-OP
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| PEAK PPO BRONZE | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Peak PPO Bronze HDHP | PPO · Expanded Bronze | Preferred | Accepting new patients |
| PEAK PPO BRONZE HDHP | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Peak PPO Bronze Standard | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Peak PPO Catastrophic | PPO · Catastrophic | Preferred | Accepting new patients |
| Peak PPO Gold | PPO · Gold | Preferred | Accepting new patients |
| PEAK PPO GOLD | PPO · Gold | Preferred | Accepting new patients |
| PEAK PPO GOLD HDHP | PPO · Gold | Preferred | Accepting new patients |
| Peak PPO Gold Standard | PPO · Gold | Preferred | Accepting new patients |
| Peak PPO Silver | PPO · Silver | Preferred | Accepting new patients |
| PEAK PPO SILVER | PPO · Silver | Preferred | Accepting new patients |
| PEAK PPO SILVER HDHP | PPO · Silver | Preferred | Accepting new patients |
| Peak PPO Silver Standard | PPO · Silver | Preferred | Accepting new patients |
| Plus Bronze (2 plan variants) | PPO · Expanded Bronze | Tier Two | Accepting new patients |
| Plus Bronze HDHP | PPO · Expanded Bronze | Tier Two | Accepting new patients |
| Plus Bronze Standard | PPO · Expanded Bronze | Tier Two | Accepting new patients |
| Plus Gold (2 plan variants) | PPO · Gold | Tier Two | Accepting new patients |
| Plus Gold HDHP | PPO · Gold | Tier Two | Accepting new patients |
| Plus Gold Standard | PPO · Gold | Tier Two | Accepting new patients |
| Plus Silver | PPO · Silver | Tier Two | Accepting new patients |
| Plus Silver HDHP | PPO · Silver | Tier Two | Accepting new patients |
| Plus Silver Standard | PPO · Silver | Tier Two | Accepting new patients |
PacificSource Health Plans
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 8 plans from PacificSource Health Plans
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Core Bronze HSA 10600 | EPO · Bronze | Tier One | Accepting new patients |
| Core Bronze HSA 8300 | EPO · Expanded Bronze | Tier One | Accepting new patients |
| Core Gold 1500 | EPO · Gold | Tier One | Accepting new patients |
| Core Silver 3500 | EPO · Silver | Tier One | Accepting new patients |
| Core Silver 5000 | EPO · Silver | Tier One | Accepting new patients |
| Core Standard Expanded Bronze HSA | EPO · Expanded Bronze | Tier One | Accepting new patients |
| Core Standard Gold | EPO · Gold | Tier One | Accepting new patients |
| Core Standard Silver | EPO · Silver | Tier One | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Phillip S. Key is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Phillip S. Key is enrolled to bill Medicare as a Practitioner - Otolaryngology .
Bills through: Billings Clinic Specialty Supplies And Services, Llc
Based on Medicare's public enrollment records as of Sep 29, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Intersect Ent | $136 |
| Atos Medical | $12 |
Other
| Food and Beverage | $149 |
Studies
HARVARD MEDICAL SCHOOL
Graduated in 1988
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Questions & Answers
Does Dr. Phillip S. Key accept patients with Mountain Health CO-OP?
Yes, Dr. Phillip S. Key is listed in-network for Mountain Health CO-OP through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Has Dr. Phillip S. Key affiliation with hospitals?
Dr. Phillip S. Key is affiliated with BILLINGS CLINIC.
Where can you meet with Dr. Phillip S. Key?
Dr. Phillip S. Key's office is located at 801 North 29th Street in Billings, MT 59101.
What conditions does Dr. Phillip S. Key treat?
Dr. Phillip S. Key provides treatment for Chronic Rhinitis, Deafness, Hay Fever, Inner Ear Disorders, Middle Ear Infection, Vertigo. For the full list see this list.
Does Dr. Phillip S. Key have affiliation with practices?
Dr. Phillip S. Key is affiliated with Billings Clinic Hospital. For the full list of practices see this list.