Dr. Mary M. Hammack, MD
- Medicare services, 2024
- 12,855
- Medicare patients, 2024
- 641
- Part D claims, 2024
- 8,463
- Hospital affiliations
- 6
- Industry payments
- $11,761
- Practice address
- 6124 W Parker Rd, Plano, TX 75093
- Practice phone
- Call (469) 467-0100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
West Plano Plastic Surgery Center
Plano, Texas
Find Dr. Hammack's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mary M. Hammack is an internist in Plano, Texas
Dr. Hammack practices at West Plano Plastic Surgery Center in Plano, Texas.
Dr. Hammack's NPI, 1871501874, was assigned on August 4, 2006. Dr. Hammack graduated from Joe R. & Teresa Lozano Long School of Medicine in 1988. Dr. Hammack's Texas license number on file is H6269.
- NPI
- 1871501874NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0648229500
- NPI enumeration date
- August 4, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (469) 467-0100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mary M. Hammack practices at West Plano Plastic Surgery Center in Plano, Texas
Dr. Hammack's primary practice is West Plano Plastic Surgery Center, at 6124 W Parker Rd, Plano, TX 75093 in Collin County. The practice phone is (469) 467-0100.
- West Plano Plastic Surgery Center6124 W Parker Rd, Plano, TX 75093 · Collin CountyPhone(469) 467-0100
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mary M. Hammack is affiliated with 9 sites of care and 1 medical group
Dr. Hammack's primary practice is West Plano Plastic Surgery Center in Plano, Texas. Dr. Hammack is also affiliated with Medical City Plano Hospital. The medical group on file is Internal Medicine Associates of Plano. Dmand AI also links Dr. Hammack to 5 more hospitals, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mary M. Hammack's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hammack practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| West Plano Plastic Surgery Center | Available with a free account |
| +8 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mary M. Hammack is one of 8,437 internists in Texas
Internal medicine is Dr. Hammack's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hammack has a license on file in Texas.
Specialties and state licenses
- Internal medicine, TexasPrimary
Clinical focus
Dmand AI lists acid reflux, acute mini-stroke (TIA), acute sinusitis, acute skin infection, ADHD, adjustment disease, alzheimer's disease and aneurysm among the conditions Dr. Hammack treats.
Internists near Dr. Hammack
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mary M. Hammack billed Medicare for 12,855 services in 2024
CMS data shows 12,855 Medicare services from Dr. Hammack across 41 procedure codes in 2024, for 641 Medicare patients. Medicare paid $438,957 for them. Every service was in an office.
Dr. Hammack's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9,6242024: 7,56221%
- Lab and pathology
- 2023: 4,2972024: 3,70314%
- Other services
- 2023: 1,4172024: 1,18816%
- Tests and treatments
- 2023: 4422024: 30930%
- Imaging
- 2023: 1072024: 9313%
- Surgery
- 2023: 1942024: 0100%
Dr. Hammack compared with the Texas median for internists, 2024
- Dr. Hammack
- Texas median
- Medicare services
- 12,855vs 53923.8 times
- Medicare patients
- 641vs 1903.4 times
- Part D claims
- 7,677vs 28926.6 times
Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.
Dr. Hammack's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hammack and other internists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mary M. Hammack treated 641 Medicare patients in 2024, average age 77
CMS counts 641 Medicare patients who saw Dr. Hammack in 2024. The largest group is 75 to 84, with 283 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 3% are also on Medicaid. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hammack's median patient age at 59, with 67% women.
Dr. Hammack's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hammack's Medicare patients by sex, 2024
- Women44970%
- Men19230%
Chronic conditions among Dr. Hammack's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis56%
- Diabetes30%
- Osteoporosis30%
- Anxiety26%
- Ischemic heart disease25%
- Mood disorders24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hammack's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women67%
- Men32%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mary M. Hammack wrote 8,463 Medicare Part D claims in 2024
In 2024, Dr. Hammack wrote 8,463 Medicare Part D claims for 559 patients. 87% of them were for generic drugs. CMS names the drug for 7,677 of them, across 137 drugs with 11 or more claims each, at $580,750 in total drug cost. In 2023, CMS named 7,690 claims across 135 drugs.
Dr. Hammack's Part D claims by kind of drug, 2024
- Generic7,352 claims87%
- Brand-name1,094 claims13%
- Other17 claims0%
Dr. Hammack's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hammack's Part D claims, 2024
- Opioids2%202 of 8,463 claims
- Antibiotics3%229 of 8,463 claims
- Antipsychotics, patients 65 and over0%33 of 8,463 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7,6902024: 7,677No change
Drugs named by CMS: 137 in 2024, 135 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Mary M. Hammack offers telehealth to Medicare patients
Dr. Hammack accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Hammack as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mary M. Hammack received $11,761 in industry payments from 2016 to 2025
CMS Open Payments shows 812 general payments to Dr. Hammack from 60 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Novo Nordisk Inc paid the most, $1,618.
General payments to Dr. Hammack by program year, 2016 to 2025
General payments to Dr. Hammack by kind, 2016 to 2025
- Food and beverage$11,64699%
- Education$1161%
Companies that paid Dr. Hammack the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mary M. Hammack has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Hammack, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Hammack
- 2013
- CMS Stage 1 EHR
- Undated
- Bridges to Excellence
Source: Dmand AI Professional Profile Data
Dr. Mary M. Hammack graduated from Joe R. & Teresa Lozano Long School of Medicine
Dr. Hammack graduated from Joe R. & Teresa Lozano Long School of Medicine in 1988. Dr. Hammack is a member of ACP.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Mary M. Hammack accepts plans from 19 insurance carriers
Dr. Hammack is in network with 19 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 13. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- HCSC
- Humana
- Alliant Health Plans
- +11 more carriersWith a free account
Plan types Dr. Hammack accepts, by number of carriers
- PPO13
- HMO11
- Medicare10
- POS5
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Mary M. Hammack's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mary M. Hammack
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mary M. Hammack's NPI number?
Dr. Mary M. Hammack's NPI number is 1871501874. It was assigned on August 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary M. Hammack?
Dr. Mary M. Hammack is an internist in Plano, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mary M. Hammack practice?
Dr. Hammack practices at 6124 W Parker Rd, Plano, TX 75093. Dr. Hammack's primary practice is West Plano Plastic Surgery Center in Plano, Texas. Dmand AI also links Dr. Hammack to 5 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. Mary M. Hammack's office phone number?
The practice phone on file for Dr. Hammack is (469) 467-0100.
What is Dr. Mary M. Hammack's medical license number?
Dr. Hammack's Texas license number on file is H6269.
Which hospitals is Dr. Mary M. Hammack affiliated with?
Dr. Hammack is affiliated with Medical City Plano Hospital. Dmand AI links Dr. Hammack to 5 more hospitals.
What medical group is Dr. Mary M. Hammack part of?
Dr. Hammack is linked to Internal Medicine Associates of Plano.
Does Dr. Mary M. Hammack accept Medicare?
Yes. CMS data shows Dr. Hammack billed Medicare for 12,855 services in 2024, and Dr. Hammack accepts Medicare assignment.
Does Dr. Mary M. Hammack offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Hammack as offering telehealth services.
How many Medicare patients does Dr. Mary M. Hammack see?
CMS counts 641 Medicare patients who saw Dr. Hammack in 2024, with an average age of 77.
Show 6 more questionsShow fewer questions
What services does Dr. Mary M. Hammack bill to Medicare?
In 2024, Dr. Hammack's most billed Medicare services were care management and other visits (99458), care management and other visits (99439) and care management and other visits (99457).
Where did Dr. Mary M. Hammack go to medical school?
Dr. Hammack graduated from Joe R. & Teresa Lozano Long School of Medicine in 1988.
What drugs does Dr. Mary M. Hammack prescribe most?
In 2024 Medicare Part D data, Dr. Hammack's most prescribed drugs by claims were Levothyroxine Sodium, Atorvastatin Calcium and Escitalopram Oxalate.
Has Dr. Mary M. Hammack received payments from drug or device companies?
CMS Open Payments shows $11,761 in general payments to Dr. Hammack from 60 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Mary M. Hammack been practicing?
Dr. Hammack graduated from medical school in 1988, 38 years ago.
What insurance does Dr. Mary M. Hammack accept?
Dr. Hammack is in network with 19 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 13. Check the plan with the practice before a visit.
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