MR. STEWART MASON M.D.
NPI 1871519835
Obstetrics & Gynecology in Fresno, CA

Active since July 14, 2006PECOS EnrolledAccepts Medicare Assignment
85.78/100
CMS Quality Rating
1374 E ALLUVIAL AVE, FRESNO, CA 93720(559) 981-2600(559) 981-2610 Get Directions Write a Review

NPPES record last updated: September 18, 2013. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mr. Stewart Mason M.d. NPPES

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

MR. STEWART MASON M.D. (NPI 1871519835) is an individual obstetrics & gynecology provider in Fresno, California, licensed in California (A72105) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Medical College Of Pennsylvania (1998).

NPPES Registry Identity

NPI1871519835
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameMR. STEWART MASONCredential: M.D.
Location Address1374 E ALLUVIAL AVEFresno, CA 93720-2608
Mailing Address1374 E Alluvial AveFresno, CA 93720-2608 · (559) 981-2600 · Fax (559) 981-2610
Fax(559) 981-2610
Sole ProprietorNo
Medical School CMSMedical College Of PennsylvaniaGraduated 1998
Enumeration DateJuly 14, 2006
Last NPPES UpdateSeptember 18, 2013
NPI 1871519835 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 · A72105
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.
1374 E ALLUVIAL AVE, Fresno, CA 93720

Other Identifiers 2

Medicare UPINH74209CA
Medicaid00A721050CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Mr. Stewart Mason 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 ID1254384456
PECOS Enrollment IDI20050307000572
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.

Areas of Expertise CMS Part B claims 9

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.

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.
144 services93 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
86 services71 patients
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.
81 services81 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.
48 services48 patients
Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina 76830
An ultrasound scan of the lower abdominal region is a safe, non-invasive procedure that uses sound waves to create images of internal structures. This helps in checking the health of reproductive organs and detecting any abnormalities. The scan is done via a small probe inserted into the body.
45 services36 patients
Complete ultrasound scan of pelvis 76856
A complete ultrasound scan of the pelvis is a safe, non-invasive imaging procedure. It uses sound waves to create pictures of your lower abdomen area, helping doctors to evaluate and diagnose any potential issues. It's painless and usually takes about 30 minutes.
37 services36 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93720 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
$133.94 typical visit price
range $58.87 – $176.60
Typical copayment $33.48 (range $14.71 – $44.15)
Most-billed visit code 99204
Established Patient
$73.16 typical visit price
range $19.28 – $144.60
Typical copayment $18.29 (range $4.82 – $36.15)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

85.78/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality91.3
Promoting Interoperability100
Improvement Activities40
Cost61.3

Other Providers at the Same Location NPPES 10

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

Obstetrics & Gynecology
1374 E ALLUVIAL AVE
FRESNO, CA 93720
Nurse Practitioner
1374 E ALLUVIAL AVE
FRESNO, CA 93720
Obstetrics & Gynecology
1374 E ALLUVIAL AVE
FRESNO, CA 93720
Nurse Practitioner (Family)
1374 E ALLUVIAL AVE
FRESNO, CA 93720
Nurse Practitioner (Women's Health)
1374 E ALLUVIAL AVE
FRESNO, CA 93720
Obstetrics & Gynecology
1374 E ALLUVIAL AVE
FRESNO, CA 93720
Obstetrics & Gynecology
1374 E ALLUVIAL AVE
FRESNO, CA 93720
Nurse Practitioner (Family)
1374 E ALLUVIAL AVE
FRESNO, CA 93720

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Stewart Mason's NPI number?

The NPI number for Stewart Mason is 1871519835. It was assigned to this individual provider in the NPPES registry on July 14, 2006.

Where is Stewart Mason located?

Stewart Mason practices at 1374 E Alluvial Ave, Fresno, CA 93720. The listed phone number is (559) 981-2600.

What is Stewart Mason's specialty?

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

Is Stewart Mason enrolled in Medicare?

Yes. Stewart Mason is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Stewart Mason was last updated on September 18, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.