Name: Dr. Clarissa Ann Mashchak

Specialty: Gynecology, Reproductive Endocrinology, Obstetrics and Gynecology (OB/GYN)

ualification / Board Certification: MD — Loma Linda University School of Medicine; Board Certified by the American Board of Obstetrics and Gynecology (ABOG)

Affiliation(s): Erlanger Baroness Hospital — Chattanooga, TN (Castle Connolly Top Hospital); CommonSpirit — Memorial Hospital Chattanooga, TN (Castle Connolly Top Hospital); Erlanger Bledsoe Hospital — Pikeville, TN Locations (City/State): Chattanooga, TN; Ooltewah, TN

Languages Spoken: English, Spanish

Accepting New Patients: Yes

NPI Number: 1245202183

About the Doctor

Dr. Clarissa Ann Mashchak is a highly accomplished, board-certified Gynecologist, Reproductive Endocrinologist, and Obstetrician/Gynecologist whose extensive training across three distinct medical disciplines reflects an exceptional depth of expertise in women’s health and reproductive medicine. She earned her Doctor of Medicine degree from Loma Linda University School of Medicine, a prestigious institution recognized for its commitment to excellence in medical education and compassionate patient care. She subsequently completed a uniquely rigorous series of residency programs — Reproductive Endocrinology at LA County-USC Medical Center, Obstetrics and Gynecology at White Memorial Medical Center, and Internal Medicine at LA County-USC Medical Center — a combination of training that equips her with a comprehensive, integrated understanding of women’s reproductive health across its full hormonal, surgical, and systemic dimensions.

Certified by the American Board of Obstetrics and Gynecology, Dr. Mashchak brings particular clinical depth to the management of menopause and menopausal disorders, reproductive endocrinology, ovarian conditions, vulvar disorders, pelvic pain, osteoporosis, and gynecologic cancer screening. Her triple-residency background — spanning reproductive endocrinology, obstetrics and gynecology, and internal medicine — allows her to address the complex hormonal, metabolic, and systemic health concerns that often accompany gynecological conditions in women across all life stages. This integrative perspective is a significant clinical asset for patients managing conditions such as hypothyroidism, vitamin D deficiency, prediabetes, and osteoporosis alongside their gynecologic care needs.

Dr. Mashchak has earned a perfect 5-star overall patient experience rating, with 100% of reviewed patients reporting friendly staff, meaningful time with the doctor, easy appointment booking, and highly attentive follow-up care. This outstanding patient feedback underscores the warmth, professionalism, and thoroughness she brings to every clinical encounter. She is bilingual in English and Spanish, making her practice accessible to Spanish-speaking patients throughout the Chattanooga and Ooltewah communities. She is affiliated with two Castle Connolly Top Hospitals and is currently accepting new patients at both of her Tennessee practice locations.

Key Highlights:

• Board-certified by the American Board of Obstetrics and Gynecology (ABOG)
• Graduate of Loma Linda University School of Medicine
• Triple residency training — Reproductive Endocrinology, OB/GYN, and Internal Medicine
• Perfect 5-star patient experience rating — 100% satisfaction in attentiveness, office experience, and booking
• Specialized expertise in menopause, reproductive endocrinology, and vulvar disorders
• Affiliated with two Castle Connolly Top Hospitals in Chattanooga, TN
• Two practice locations — Chattanooga and Ooltewah, TN
• Bilingual — fluent in English and Spanish
• Currently accepting new patients
• NPI Number: 1245202183

Education & Training

Medical School: Loma Linda University School of Medicine — Doctor of Medicine (MD)

Residency: LA County-USC Medical Center — Reproductive Endocrinology Residency White Memorial Medical Center — Obstetrics and Gynecology Residency (White Memorial Medical Center Program) LA County-USC Medical Center — Internal Medicine Residency

Fellowship / Additional Training: Fellowship details beyond residency training are not currently publicly listed. Given her Reproductive Endocrinology residency, additional subspecialty fellowship training in REI may have been completed. Please contact her office at (423) 778-2580 for complete training details.

Board Certification: American Board of Obstetrics and Gynecology (ABOG) — Obstetrics and Gynecology

Medical Conditions Treated

As a Gynecologist, Reproductive Endocrinologist, and OB/GYN, Dr. Mashchak diagnoses, manages, and treats a comprehensive range of women’s health and reproductive conditions. Conditions she commonly addresses include the following.

• Women’s health examination findings and gynecologic concerns
• Menopause (natural and surgical menopause management)
• Breast Cancer Screening and preventive oncology referrals
• Toxic exposure evaluation in the context of women’s health
• Menopausal disorders (hot flashes, night sweats, hormonal imbalance)
• Ovarian disorders (cysts, polycystic ovarian syndrome, ovarian insufficiency)
• Vulvar disorders (lichen sclerosus, vulvodynia, vulvar lesions)
• Hypothyroidism and thyroid dysfunction in women
• Poisoning and toxic exposure with reproductive health implications
• Pelvic pain (acute and chronic pelvic pain syndromes)
• Cancer screening — gynecologic cancer evaluation and prevention
• Vitamin D deficiency and nutritional disorders in women
• Osteoporosis and bone density loss
• Prediabetes and metabolic health in women
• Female genital disorders (vaginal, cervical, and uterine conditions)
• Infertility evaluation and reproductive endocrinology
• Hormonal imbalances and endocrine disorders
• Endometriosis and uterine fibroids
• Abnormal uterine bleeding and menstrual disorders
• Sexually transmitted infections and cervical health

Medical Procedures Performed

Dr. Mashchak performs a range of gynecologic and reproductive medicine procedures as part of her practice. These include the following.

• Vulva/Perineum Biopsy (tissue sampling of vulvar and perineal lesions for pathological diagnosis)
• Women’s health examinations (annual gynecologic wellness evaluations)
• Pap smear and cervical cancer screening
• Colposcopy and cervical biopsy
• Breast cancer screening coordination and clinical breast examination
• Menopause management and hormone therapy evaluation
• Osteoporosis screening and bone density assessment coordination
• Endometrial evaluation and uterine health assessment
• Pelvic examination and pelvic floor evaluation
• Ovarian cyst evaluation and monitoring
• Reproductive endocrinology consultation and hormonal workup
• Infertility evaluation and ovulation assessment
• Sexually transmitted infection testing and treatment
• Thyroid function evaluation in the context of reproductive health
• Vitamin D and metabolic health screening
• Cancer screening referral and coordination

Services Offered

Dr. Clarissa Ann Mashchak provides a comprehensive, highly specialized, and deeply personalized range of gynecologic and reproductive medicine services for women across all stages of life. Her unique combination of training in reproductive endocrinology, obstetrics and gynecology, and internal medicine enables her to offer a level of integrated, whole-woman care that is rare in clinical practice — addressing not only reproductive health concerns but also the hormonal, metabolic, and systemic factors that profoundly influence women’s wellbeing.

Comprehensive Women’s Health Examinations: Dr. Mashchak provides thorough annual gynecologic wellness examinations that encompass pelvic examination, Pap smear, clinical breast examination, reproductive health history review, STI screening, and personalized preventive counseling. These visits form the foundation of her preventive care practice and are designed to detect health concerns at the earliest opportunity.

Menopause and Hormone Management: A central pillar of Dr. Mashchak’s specialized practice is the management of menopause and menopausal disorders. She provides comprehensive menopausal evaluation, including assessment of hormonal status, symptom impact, cardiovascular risk, and bone health, and develops individualized hormone replacement and non-hormonal therapy plans tailored to each patient’s health history, preferences, and risk profile. Her reproductive endocrinology training gives her a uniquely sophisticated understanding of the hormonal transitions of menopause and how to manage them most effectively.

Reproductive Endocrinology and Fertility Services: Drawing on her residency training in Reproductive Endocrinology at LA County-USC Medical Center, Dr. Mashchak provides evaluation and management of reproductive hormonal conditions including polycystic ovary syndrome, ovarian insufficiency, hormonal imbalances, and related fertility concerns. She conducts thorough hormonal workups and develops individualized management strategies for patients navigating reproductive health challenges.

Osteoporosis and Bone Health: Dr. Mashchak evaluates and manages osteoporosis in women — particularly those in the peri- and post-menopausal transition, during which bone density loss accelerates significantly. She coordinates bone density screenings and develops personalized management plans incorporating calcium, vitamin D, lifestyle modifications, and pharmacological intervention when indicated.

Vulvar and Pelvic Disorder Care: Dr. Mashchak has clinical expertise in evaluating and managing complex vulvar conditions including lichen sclerosus, vulvodynia, and vulvar lesions requiring biopsy. She performs vulva/perineum biopsies for diagnostic evaluation and provides comprehensive treatment plans for patients with chronic pelvic pain, pelvic floor disorders, and female genital conditions.

Cancer Screening and Gynecologic Oncology Support: Dr. Mashchak provides thorough gynecologic cancer screening services, including Pap smear, HPV testing, colposcopy, cervical biopsy, and breast cancer screening coordination. For patients with abnormal results, she provides follow-up evaluation, counseling, and referral to gynecologic oncologists when advanced care is needed.

Metabolic and Systemic Women’s Health: Reflecting her internal medicine training, Dr. Mashchak addresses metabolic and systemic conditions that frequently impact women’s reproductive and overall health — including hypothyroidism, vitamin D deficiency, prediabetes, and toxic exposure. She integrates management of these conditions into her gynecologic care, providing a uniquely holistic approach to women’s health.

Bilingual Care: Dr. Mashchak and her clinical team provide consultations and care in both English and Spanish, ensuring that Spanish-speaking patients throughout the Chattanooga area receive accessible, culturally sensitive women’s healthcare.

Services at a Glance:

• Annual gynecologic wellness examinations
• Pap smear and cervical cancer screening
• Colposcopy and cervical biopsy
• Breast cancer and gynecologic cancer screening
• Menopause and hormone replacement therapy management
• Menopausal disorder evaluation and treatment
• Reproductive endocrinology evaluation and hormonal workup
• Ovarian disorder evaluation and management
• Vulvar disorder evaluation and vulva/perineum biopsy
• Pelvic pain evaluation and treatment
• Osteoporosis screening and bone health management
• Vitamin D deficiency and nutritional health management
• Hypothyroidism and thyroid health in women
• Prediabetes and metabolic health evaluation
• Infertility evaluation and reproductive health consultation
• STI screening and sexual health services
• Toxic exposure evaluation in reproductive health context
• Bilingual care in English and Spanish
• Telehealth consultations (contact office for availability)

Accepted Insurance Plans

• Medicaid
• Medicare
• UnitedHealthcare
• BlueCross BlueShield of Tennessee
• CVS Health (formerly Aetna)
• Humana
• Alliant Health Plans
• Mutual of Omaha
• Express Scripts
• State of Tennessee (TennCare)
• All Other Third Party Plans (contact office to verify)

Please call (423) 778-2580 before your appointment to confirm that your specific insurance plan and network are accepted. This list is regularly updated but is not a guarantee of coverage.

Practice Locations

Location 1 — Primary Practice Address: 979 E 3rd St, Suite C725, Chattanooga, TN 37403

Phone: (423) 778-2580

Location 2 — Secondary Practice Address: 6401 Mountain View Rd, Suite 101, Ooltewah, TN 37363

Phone: Call main office — (423) 778-2580

Hospital Affiliations

• Erlanger Baroness Hospital — Chattanooga, TN (Castle Connolly Top Hospital; Ranked: Cancer Surgery and 5 additional procedures; admitting privileges)
• CommonSpirit — Memorial Hospital Chattanooga — Chattanooga, TN (Castle Connolly Top Hospital; Ranked: Cancer Surgery and 3 additional procedures; admitting privileges)
• Erlanger Bledsoe Hospital — Pikeville, TN (Admitting privileges)