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

Q: 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.

Q: What is Stewart Mason'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 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 13 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 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: October 25, 2026.

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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

Phone(559) 981-2600

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

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Other Identifiers 2

Medicare UPINH74209CA

Medicaid00A721050CA

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

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.

Medicare Billing Reassignment

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

Community Foundation Medical Group

2.7 mi

Internal Medicine

7370 N PALM AVE STE 101
Fresno, CA 93711

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

NPI 1003329491 (559) 228-5400

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 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

Quality

91.3

Promoting Interoperability

100

Improvement Activities

Cost

61.3

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.

DR. ROBERT EUGENE CURRY M.D.

Obstetrics & Gynecology