Our Services

Specialty Care

GMG has developed a Specialty Clinic program in-house to better serve our patients.  We believe that by adding several key specialties to our practice, we can improve patient care through improved specialty access, coordination of care along with the Primary Care Physician, use of a common Electronic Health Record avoiding duplication of tests, and by providing specialty care that is aligned to our values and philosophy.   We have an excellent group of specialists that have enhanced our practice on several specialties. All specialists see established GMG patients only.

Endocrinology Specialists – Dr. Luis Anaya Hoyos and Dr. Maria Escobar-Vasco

Endocrinology is a specialty of medicine which deals with the diagnosis and treatment of diseases related to hormones. Dr. Luis Anaya Hoyos is a Board Certified Endocrinology Specialist. He sees patients Mondays and Tuesdays at the Main Clinic and Wednesday through Friday at the Woodlawn Clinic.

Dr.Escobar is Board Certified in Internal Medicine and Endocrinology. Dr. Escobar has a great interest in lipid disorders, obesity management, diabetes management, and osteoporosis. Dr. Escobar sees patients Monday through Friday at the Main Clinic.

Dr. Anaya Hoyos treats the following:

Adult Endocrinology (ages 21 and up):
• Diabetes Mellitus and evaluation of hypoglycemic disorders.

Thyroid disorders such as:
• Hyperthyroidism
• Hypothyroidism
• Thyroid cancer
• Thyroid nodules including a performance of ultrasound-guided FNA

Pituitary gland disorders such as:
• Pituitary tumors
• Diabetes insipidus
• Cushings disease
• Conditions affecting growth hormone
• Thyroid hormone
• Prolactin
• Sex hormones balance

Disorders of Bone, and Calcium metabolism:
• Osteoporosis
• Paget’s disease
• Hypercalcemia
• Hypocalcemia
• Phosphate abnormalities
• Parathyroid gland tumors
• Male hypogonadism

Adrenal gland disorders:
• Adrenal tumors
• Pheochromocytoma
• Cushings
• Hyperaldosteronism
• Adrenal insufficiency

Familial endocrine conditions:
• MEN syndromes (Multiple Endocrine Neoplasia)
• Familial pheochromocytoma/Paraganglioma syndrome

Hematology & Oncology Specialists – Dr. Esther Urbaez-Duran and Dr. Marcela Canola-Mazo

Dr. Duran and Dr. Mazo are our in-house Hematology/Oncology Specialists.  Dr. Duran sees patients daily at the Main Clinic and Dr. Mazo sees patients Mondays at Main Clinic and Tuesday through Thursday at the Woodlawn Clinic.

Dr. Duran and Dr. Mazo treats the following:
• Anemia
• B12 deficiency
• Abnormal Mammograms
• Prostate Cancer
• Antiphospholipid Syndrome (APS)
• Breast Cancer
• Carcinoma in Situ
• Coagulation Disorders (incl. Hemophilia)
• Deep Vein Thrombosis (DVT)
• Hodgkin’s Disease
• Hypercoagulable State
• Leukocytosis
• Liver Cancer
• Lung Cancer
• Myelodysplastic Syndromes
• Myeloproliferative Disorders
• Neutropenia
• Polycythemia Rubra Vera
• Renal (Kidney) Cancer
• Secondary Malignancies
• Thalassemia
• Thrombocytosis


Treatments performed:
• In-House Bone Marrow Biopsy
• Iron Infusions

Infectious Diseases Specialist – Dr. Alexandra Castro Pena

Dr. Alexandra Castro-Pena is our in-house Infectious Disease Specialist. She sees patients Monday through Tuesday at the Woodlawn Clinic and Wednesday through Friday at the Main Clinic.

Dr. Castro-Pena treats the following:
• Hepatitis C
• Bacterial Infections and Fungal Infections
• Latent Tuberculosis

Joint Injection Clinic

The Joint Injection Clinic is available at the Main Clinic for patients suffering from chronic joint pain. Dr. Louis Gutierrez is our in-house joint physician.

Podiatry Specialist – Dr. Daniel Cruz

The Northwest and Main Clinics features podiatry. Our in-house Podiatry Specialist, Dr. Cruz, sees patients Monday–Wednesday at the Main Clinic, Thursdays at the Northwest Clinic, and Fridays are surgery days.

Dr. Cruz sees many common issues involving:
• Heel pain and Bunions
• Hammertoes
• Foot or ankle arthritis
• Instability, acute injuries as well as fractures
• Chronic Issues like would care and diabetic foot care as well as surgical correction for these problems if needed.

In-clinic procedures include:
• Ingrown nail removal
• Injections
• Wound care and removal of skin lesions of the foot and ankle as well as other minor surgical procedure done in office.

Other surgeries can be performed in an outpatient surgical setting by Dr. Cruz; such as bunionectomy and hammertoes correction, foot and ankle surgeries, fracture repair and arthroscopy of foot and ankle.

Rheumatology Specialists – Dr. Ana Ballester-Fiallo and Dr. Aaron Garza

Our in-house Rheumatology Specialists are Dr. Ana Ballester-Fiallo and Dr. Aaron Garza. Dr. Garza sees patients Monday through Friday at our Main Clinic and Dr. Ballester-Fiallo sees patients at the Downtown Clinic Monday, Wednesday, Thursday mornings, and Friday, at the Main clinic Thursday afternoons, and at the Northwest Clinic Tuesdays.

Dr. Ballester-Fiallo sees many common medical issues involving:
• Systemic Lupus Erythematosus
• Lupus Nephritis
• Inflammatory muscle disease
• Polymyositis
• Dermatomyositis
• Antiphospholipid Syndrome
• Lupus Anticoagulant
• Gout
• Carpal tunnel Syndrome
• Osteoporosis
• Treatment of Arthritis
• Rheumatoid Arthritis
• Psoriatic Arthritis
• Ankylosing Spondylitis
• Vasculitis
• Wegener’s granulomatosis
• Microscopic Polyangiitis
• Temporal Arteritis

In-clinic procedures include:
• Joint drainage
• Temporal Arteritis

Dr. Garza sees patients daily and treats the following:
Diagnosis and Management of Rheumatologic Conditions:

  • Rheumatoid Arthritis
  • Systemic Lupus Erythematosus
  • Scleroderma
  • Sjogren Syndrome
  • Inflammatory Muscle disease
  • MCTD and overlap syndromes
  • Antiphospholipid Syndrome
  • Polymyalgia Rheumatica
  • Vasculitis
  • Ankylosing Spondylitis
  • Psoriatic Arthritis
  • Relapsing Polychondritis
  • Reactive Arthritis
  • Gout
  • Pseudo gout
  • Osteoarthritis
  • Osteoporosis
  • Confirmation of diagnosis of fibromyalgia

In office procedures:

  • Ultrasound Guided and Blind intra-articular/soft tissue injections
  • Injections of the:
    • Knee
    • Hip
    • Shoulder
    • Elbow
    • Wrists
    • Ankle
    • Finger Joints
  • Aspiration of the above joints
  • Trigger point injections on trapezius muscle
  • Carpal tunnel Injection
  • DeQuervain’s Injections
  • Trigger finger injections

Wound Care and Dermatology Specialist – Dr. Gabriel Botero

Gonzaba Medical Group offers a Wound Care and Dermatology Clinic that specializes in the consultation and treatment of wounds and ulcers and other medical issues. Our in-house Wound Care and Dermatology Specialist is Dr. Gabriel Botero.

Dr. Botero see patients daily at the Main clinic and treats the following:

  • Diabetic foot ulcer
  • Post traumatic ulcer
  • Pretibial ulcer
  • Pressure ulcer
  • Burns
  • Venous stasis ulcer
  • PVD with symptoms
  • Incisional wound
  • Gangrene
  • Actinic keratosis
  • Seborrheic keratosis
  • Skin cancer
  • Biopsy
  • Alopecia
  • Lipoma
  • Sebaceous cyst

Dermatology such as:

  • psoriasis
  • contact dermatitis and stasis dermatitis
  • moles
  • folliculitis
  • fibroma
  • eczema

Well-Woman Clinic

The Well-Woman Clinic is provided one Saturday of the month.  GMG provides screenings, such as mammograms, bone density exams and pap tests.