Physician Profile
John Charles Gustafson, M.D.
Unclaimed ProfileAbout Dr. Gustafson
John Charles Gustafson, M.D. practices obstetrics/gynecology in Ventura, CA. John is a 1977 graduate of University of Rochester School of Medicine and Dentistry. John is also listed as specializing in obstetrics & gynecology. According to Medicare claims data, John cared for 221 Medicare patients across 232 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (805) 643-8695
- Email not available
Practice Locations
2795 LOMA VISTA RD
Ventura, CA 93003
Conditions Commonly Evaluated or Treated
Within Obstetrics and Gynecology 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
Procedures & services
Most searched procedures
Procedures Most Often Billed to Medicare
232 services · 221 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of lining of uterus and/or removal of polyp using an endoscope | Procedure | 58558 |
11 |
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | Billing code | G0101 |
111 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
54 |
| Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Billing code | Q0091 |
43 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
13 |
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 obstetrics/gynecology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
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.
Other obstetrics/gynecology specialists in Ventura 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of Rochester School of Medicine and Dentistry 8
Other providers in the same specialty who trained at the same institution.
Class of 1977 at University of Rochester School of Medicine and Dentistry 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of lining of uterus and/or removal of polyp using an endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Gustafson specialize in?
Dr. Gustafson is an obstetrics/gynecology in Ventura, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OBSTETRICS/GYNECOLOGY”.
NPI registry
Where is Dr. Gustafson located?
Dr. Gustafson is listed at 2795 LOMA VISTA RD, Ventura, CA 93003. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Gustafson's phone number?
The number on file is (805) 643-8695. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Gustafson's NPI number?
Dr. Gustafson's National Provider Identifier is 1003836016. 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
Where did Dr. Gustafson go to medical school?
Dr. Gustafson attended University of Rochester School of Medicine and Dentistry, graduating in 1977. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Gustafson been practicing?
Dr. Gustafson has 49 years experience. Calculated from a graduation year of 1977, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Gustafson do most often?
According to Medicare billing data, Dr. Gustafson performs procedures including biopsy of lining of uterus and/or removal of polyp using an endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Gustafson confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gustafson. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.