Mary M Hammack, MD
Mary M Hammack is an Internal Medicine specialist based in Plano, TX with over 38 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
With over 38 years in internal medicine, Mary M Hammack, MD is a long-established internist in Plano. Trained at University of Texas Medical School at San Antonio (class of 1988), she has been practicing for over 38 years. CMS Medicare data shows her patients commonly have hypertension, high cholesterol, and arthritis.
At a glance
- Prescribes opioids less than 34% of reporting doctors in Texas
- Uses generic medications more than 53% of reporting doctors in Texas
- Virtual visits available — no app or travel required
Older · 6361dNPPES updated 2008-12-23 · verify NPI on CMS · Verify license at Texas Medical Board
Contact & Location
Practice Location
6124 W Parker Rd Mob Iii Suite 234, Plano, TX 75093-8124
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
Opioid Rx
↓ Lower = better1.96%
Texas avg: 5.2 · US avg: 5.1
✓ Higher than most doctors nationally(-3.1 pts)
1.96% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better88%
Texas avg: 83.8 · US avg: 82.8
✓ Higher than most doctors nationally(+5.2 pts)
Typical range among reporting doctors in TexasHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
844
Unique beneficiaries
High volumePrescription Recipients
573
Patients prescribed
Prescriptions Written
8,514
Total claims
Total Medicare drug cost: $798k
Percentile rankings compared against 4,889 reporting peers in Texas.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Arthritis.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↑ More patients than average (+1%) — a focus area for this doctor
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-6%) — less common here
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+9%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-8%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-9%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$360 received from industry
18 transactions reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Mary M Hammack's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1988
Ut Health San Antonio Joe R. and Teresa Lozano Long School of Medicine
38 years in practice
Senior practitioner
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Taxonomy: 207R00000X
Education & Training
University of Texas Medical School at San Antonio (Class of 1988)
Mailing address
6124 W. Parker Rd Suite 234 Mob Iii, Plano, TX 75093-8124
Differs from practice location
Virtual Internal Medicine Care With Mary M Hammack
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mary M Hammack for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to Plano required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Mary M Hammack
NPI records show Dr. Hammack as active with telehealth listed in Plano, TX. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (972) 981-7500.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Mary M Hammack
Practice Location
6124 W Parker Rd Mob Iii Suite 234, Plano, TX 75093-8124
Mailing Address
6124 W. Parker Rd Suite 234 Mob Iii, Plano, TX 75093-8124
This is a provider directory. Contact the office directly to schedule appointments.
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