Physician Profile
Stewart Mason, M.D.
Unclaimed ProfileAbout Dr. Mason
Stewart Mason, M.D. practices obstetrics & gynecology in Fresno, CA. Stewart is a 1998 graduate of Medical College of Pennsylvania. Medicare claims data shows Stewart provided 521 services to 443 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and cervical or vaginal cancer screening; pelvic and clinical breast examination.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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
- (559) 981-2600
- Email not available
Practice Locations
1374 E ALLUVIAL AVE
Fresno, CA 93720
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
- Endometriosis
- Heavy periods
- Menopause
- PCOS
- Pregnancy
- Yeast infection
Infections and vulvovaginal conditions
- Bacterial vaginosis
- Genital herpes
- Genital warts
- Vulvodynia
Menstrual and hormonal
- Absent periods
- Genitourinary syndrome of menopause
- Painful periods
- Perimenopause
- Premenstrual syndrome
Pelvic pain and benign gynecology
- Chronic pelvic pain
- Ovarian cysts
- Painful intercourse
- Pelvic organ prolapse
- Urinary incontinence in women
- Uterine fibroids
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
- Birth Control Side Effects
Fertility
- Infertility
- Recurrent Miscarriages
Infections
- Chlamydia
- Pelvic Inflammatory Disease (PID)
Pregnancy Complications
- High-risk pregnancy
- Twins or triplets
Vaginal & Vulvar Health
- Abnormal vaginal discharge
Procedures & services
Most searched procedures
- C-section
- Hysterectomy
- IUD insertion
- Pap smear
- Ultrasound
Contraception and office treatment
- Contraceptive implant insertion and removal
- Diaphragm fitting
- Pessary fitting and management
Pregnancy and delivery
- External cephalic version
- Forceps- or vacuum-assisted delivery
- Prenatal care
- Vaginal childbirth
Preventive and diagnostic
- Colposcopy
- Endometrial biopsy
- Human papillomavirus testing
Birth Control
Contraception
Diagnostic Procedures
- Amniocentesis
Fertility
- Egg freezing
- Intrauterine Insemination (IUI)
Hormone & Menopause
- Hormone Replacement Therapy (HRT) Consultation
Laparoscopic and adnexal surgery
- Gynecologic laparoscopy
- Ovarian cyst removal
- Ovary removal
Pelvic floor
- Pelvic organ prolapse surgery
- Sling surgery for stress incontinence
Postpartum Care
- Postpartum Checkup
Pregnancy & Prenatal
- Fetal Heart Rate Monitoring
- Prenatal genetic screening
Preventive Care
Preventive Screening
- STI Screening Panel
Routine Exams
- Pelvic exam
Surgeries
- Endometriosis Excision Surgery
- Labia Reduction
- Tubal Ligation ("Tubes Tied")
Uterine and cervical procedures
- Cervical cone biopsy
- Dilation and curettage
- Endometrial ablation
- Hysteroscopy
- LEEP
- Myomectomy
Procedures Most Often Billed to Medicare
521 services · 443 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of lining of uterus and/or removal of polyp using an endoscope | Procedure | 58558 |
17 | More often than most peers in OB-GYN |
| Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina | Imaging | 76830 |
45 | More often than most peers in OB-GYN |
| Complete ultrasound scan of pelvis | Imaging | 76856 |
37 | More often than most peers in OB-GYN |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
144 | More than most peers in OB-GYN |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
86 | More often than most peers in OB-GYN |
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | Billing code | G0101 |
81 | More often than most peers in OB-GYN |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
48 | More than most peers in OB-GYN |
| Pelvic exam | Office visit | 99459 |
26 | As often as other peers in OB-GYN |
| Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Billing code | Q0091 |
22 | As often as other peers in OB-GYN |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
15 | As often as other peers in OB-GYN |
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 OB-GYNs at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 30 related providers in 4 groups
Other OB-GYNs in Fresno 7
Same specialty, same city.
Trained at Medical College of Pennsylvania 8
Other providers in the same specialty who trained at the same institution.
Class of 1998 at Medical College of Pennsylvania 7
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 is Stewart Mason's specialty?
Stewart Mason is an OB-GYN in Fresno, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Obstetrics & Gynecology”.
NPI registry
Where can I find Stewart Mason?
Stewart Mason is listed at 1374 E Alluvial Ave, Fresno, CA 93720. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Stewart Mason?
The number on file is (559) 981-2600. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Stewart Mason?
Stewart Mason's National Provider Identifier is 1871519835. 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
What is Stewart Mason's education?
Stewart Mason attended Medical College of Pennsylvania, graduating in 1998. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Stewart Mason have?
Stewart Mason has 28 years experience. Calculated from a graduation year of 1998, reported in the CMS National Downloadable File.
CMS public data
What is Stewart Mason known for?
According to Medicare billing data, Stewart Mason performs procedures including biopsy of lining of uterus and/or removal of polyp using an endoscope; reads or performs imaging such as ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina and complete ultrasound scan of pelvis, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Stewart Mason's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Stewart Mason. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.