Physician Profile
Cornelius J. Jansen, MD
Unclaimed ProfileAbout Dr. Jansen
Cornelius J. Jansen, MD practices otolaryngology (ent) in Walnut Creek, CA. According to Medicare claims data, Cornelius cared for 68 Medicare patients across 70 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (925) 295-4000
- Email not available
Practice Locations
1425 S MAIN ST
Walnut Creek, CA 94596
Conditions Commonly Evaluated or Treated
Within Otolaryngology 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
Balance
Ear and hearing
Head, neck, and salivary
Nose and sinus
- Broken Nose
- Chronic Nasal Congestion
- Deviated Septum
- Loss of Smell
- Nasal Allergies
- Nasal Polyps
- Non-Allergic Runny Nose
- Nosebleeds
Sleep and airway
Throat and voice
- Enlarged Adenoids
- Hoarseness
- Lump in Throat Sensation
- Recurrent Strep Throat
- Silent Reflux
- Swallowing Difficulty
- Vocal Cord Nodules
- Vocal Cord Paralysis
Cancer
Head & Neck
Procedures & services
Most searched procedures
Office diagnosis
Ear & Hearing
Ear procedures
- Bone-Anchored Hearing Aid Surgery
- Cochlear Implant Surgery
- Eardrum Repair Surgery
- Earwax Removal
- Mastoid Bone Surgery
- Stapes Bone Surgery for Hearing Loss
Head & Neck
Head and neck surgery
- Neck Lymph Node Dissection
- Parathyroid Gland Removal
- Salivary Gland Tumor Removal
- Thyroid Removal Surgery
- Voice Box Removal
Nose and sinus procedures
- Balloon Sinuplasty
- Broken Nose Resetting
- Deviated Septum Surgery
- Nasal Polyp Removal
- Nose Cautery for Nosebleeds
- Nose Job
Sleep and airway
Throat, voice, and swallowing
Procedures Most Often Billed to Medicare
70 services · 68 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of impacted ear wax | Procedure | 69210 |
19 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
33 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
18 |
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.
Other otolaryngology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
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.
More connections — 8 related providers in 2 groups
Also performs Removal of impacted ear wax 7
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Jansen specialize in?
Dr. Jansen is an otolaryngology (ent) in Walnut Creek, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Otolaryngology (ENT)”.
NPI registry
Where is Dr. Jansen located?
Dr. Jansen is listed at 1425 S MAIN ST, Walnut Creek, CA 94596. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Jansen's phone number?
The number on file is (925) 295-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Jansen's NPI number?
Dr. Jansen's National Provider Identifier is 1285712380. 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 Dr. Jansen been practicing?
Dr. Jansen has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Dr. Jansen do most often?
According to Medicare billing data, Dr. Jansen performs procedures including removal of impacted ear wax, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Jansen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Jansen. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.