JOHN CHARLES GUSTAFSON M.D.
NPI 1003836016
Obstetrics & Gynecology in Ventura, CA

Q: What is John Gustafson's NPI number?

The NPI number for John Gustafson is 1003836016. It was assigned to this individual provider in the NPPES registry on July 20, 2006.

Q: What is John Gustafson's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Q: When was this NPI record last updated?

The NPPES record for John Gustafson was last updated on July 9, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 20, 2006PECOS EnrolledAccepts Medicare Assignment

2795 LOMA VISTA RD, VENTURA, CA 93003(805) 643-8695(805) 643-2087 Get Directions Write a Review

NPPES record last updated: July 9, 2007. Verified against the NPPES registry weekly; last sync: November 08, 2026.

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About John Charles Gustafson M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN CHARLES GUSTAFSON M.D. (NPI 1003836016) is an individual obstetrics & gynecology provider in Ventura, California, licensed in California (G36782) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Rochester School Of Medicine And Dentistry (1977).

NPPES Registry Identity

NPI1003836016

Entity TypeIndividualMale

Primary Taxonomy207V00000X

Provider Legal NameJOHN CHARLES GUSTAFSONCredential: M.D.

Location Address2795 LOMA VISTA RDVentura, CA 93003-1544

Mailing Address2795 Loma Vista RdVentura, CA 93003-1544 · (805) 643-8695 · Fax (805) 643-2087

Phone(805) 643-8695

Fax(805) 643-2087

Sole ProprietorNo

Medical School CMSUniversity Of Rochester School Of Medicine And DentistryGraduated 1977

Enumeration DateJuly 20, 2006

Last NPPES UpdateJuly 9, 2007

✔ NPI 1003836016 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

License✔ Licensed in CA · G36782

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

2795 LOMA VISTA RD, Ventura, CA 93003

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Other Identifiers 13

Medicare ID-Type Unspecified058608CA · Rh Medicare

Medicare ID-Type Unspecified058609CA · Rh Medicare

Other953152550CA · Other Insurance

MedicaidRHM08608FCA

MedicaidZZT40394FCA

MedicaidZZZ82842ZCA

Medicare ID-Type Unspecified050394CA · Medicare

Other951683892CA · Other Insurance

MedicaidRHM18553HCA

Medicare ID-Type Unspecified058553CA · Rh Medicare

MedicaidRHM08609FCA

Other050394CA · Blue Cross

Medicare UPINA46801

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

John Charles Gustafson M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9537106265

PECOS Enrollment IDI20050520000481

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show John Gustafson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Community Memorial Health System

0.1 mi

General Acute Care Hospital

147 N BRENT ST
Ventura, CA 93003

Reassigned Medicare billing, California enrollment
267 clinicians in this Medicare group

NPI 1215903018 (805) 652-5011

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101

This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.

111 services111 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

54 services43 patients

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091

A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.

43 services43 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

13 services13 patients

Biopsy of lining of uterus and/or removal of polyp using an endoscope 58558

This procedure involves using a thin, flexible tool (endoscope) to examine and possibly remove a small tissue sample from the inner layer of your uterus. It may also involve removing a growth. It helps to identify any issues and plan the right treatment.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93003 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$140.72 typical visit price

range $62.32 – $185.36

Typical copayment $35.18 (range $15.58 – $46.34)

Most-billed visit code 99204

Established Patient

$77.11 typical visit price

range $20.68 – $151.85

Typical copayment $19.27 (range $5.17 – $37.96)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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