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- 2795 Loma Vista Rd, Ventura, CA 93003
About Dr. Gustafson
John C. 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. The services billed most often include cervical or vaginal cancer screening; pelvic and clinical breast examination, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory. The provider's National Provider Identifier (NPI) is 1003836016.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
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
- (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
Pelvic pain and benign gynecology
- Uterine fibroids
- Chronic pelvic pain
- Ovarian cysts
- Painful intercourse
- Pelvic organ prolapse
- Urinary incontinence in women
Most searched conditions
Infections and vulvovaginal conditions
Menstrual and hormonal
- Absent periods
- Genitourinary syndrome of menopause
- Painful periods
- Perimenopause
- Premenstrual syndrome
Pregnancy
- Ectopic pregnancy
- Gestational diabetes
- Hyperemesis gravidarum
- Miscarriage
- Placenta previa
- Postpartum depression
- Preeclampsia
- Preterm labor
Cancer and precancer
- Abnormal cervical cells and cervical dysplasia
- Cervical cancer
- Endometrial cancer
- Endometrial hyperplasia
- Ovarian cancer
Contraception
Fertility
Infections
Pregnancy Complications
Vaginal & Vulvar Health
Procedures & services
Most searched procedures
Contraception and office treatment
Pregnancy and delivery
Preventive and diagnostic
Birth Control
Contraception
Diagnostic Procedures
Fertility
Hormone & Menopause
Laparoscopic and adnexal surgery
Pelvic floor
Postpartum Care
Pregnancy & Prenatal
Preventive Care
Preventive Screening
Routine Exams
Surgeries
Uterine and cervical procedures
Procedures Most Often Billed to Medicare
232 services · 221 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of lining of uterus and/or removal of polyp using an endoscope | Procedure | 58558 |
11 | Less often than most peers in Obstetrics/Gynecology |
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | Billing code | G0101 |
111 | More than most peers in Obstetrics/Gynecology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
54 | More often than most peers in Obstetrics/Gynecology |
| Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Billing code | Q0091 |
43 | More often than most peers in Obstetrics/Gynecology |
| 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 | Less often than most peers in Obstetrics/Gynecology |
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 John C. Gustafson specialize in?
John C. Gustafson is an obstetrics/gynecology in Ventura, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is John C. Gustafson located?
John C. 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 John C. Gustafson's phone number?
The number on file is (805) 643-8695. Contact the office directly to confirm availability and scheduling.
NPI registry
What is John C. Gustafson's NPI number?
John C. 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 John C. Gustafson train?
John C. 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 John C. Gustafson been practicing?
John C. Gustafson has 49 years experience. Calculated from a graduation year of 1977, reported in the CMS National Downloadable File.
CMS public data
What does John C. Gustafson do most often?
According to Medicare billing data, John C. 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 John C. Gustafson confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John C. Gustafson. If this is you, claiming it is free.
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